Commit Graph

60786 Commits

Author SHA1 Message Date
Miklos Szeredi
2b319d1f6f fuse: don't dereference req->args on finished request
Move the check for async request after check for the request being already
finished and done with.

Reported-by: syzbot+ae0bb7aae3de6b4594e2@syzkaller.appspotmail.com
Fixes: d49937749f ("fuse: stop copying args to fuse_req")
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2019-10-21 09:11:40 +02:00
Chuhong Yuan
783bf7b8b6 cifs: Fix missed free operations
cifs_setattr_nounix has two paths which miss free operations
for xid and fullpath.
Use goto cifs_setattr_exit like other paths to fix them.

CC: Stable <stable@vger.kernel.org>
Fixes: aa081859b1 ("cifs: flush before set-info if we have writeable handles")
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
2019-10-20 19:19:49 -05:00
Roberto Bergantinos Corpas
03d9a9fe3f CIFS: avoid using MID 0xFFFF
According to MS-CIFS specification MID 0xFFFF should not be used by the
CIFS client, but we actually do. Besides, this has proven to cause races
leading to oops between SendReceive2/cifs_demultiplex_thread. On SMB1,
MID is a 2 byte value easy to reach in CurrentMid which may conflict with
an oplock break notification request coming from server

Signed-off-by: Roberto Bergantinos Corpas <rbergant@redhat.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
CC: Stable <stable@vger.kernel.org>
2019-10-20 19:19:49 -05:00
Steve French
553292a634 cifs: clarify comment about timestamp granularity for old servers
It could be confusing why we set granularity to 1 seconds rather
than 2 seconds (1 second is the max the VFS allows) for these
mounts to very old servers ...

Signed-off-by: Steve French <stfrench@microsoft.com>
2019-10-20 19:19:49 -05:00
Paulo Alcantara (SUSE)
d532cc7efd cifs: Handle -EINPROGRESS only when noblockcnt is set
We only want to avoid blocking in connect when mounting SMB root
filesystems, otherwise bail out from generic_ip_connect() so cifs.ko
can perform any reconnect failover appropriately.

This fixes DFS failover/reconnection tests in upstream buildbot.

Fixes: 8eecd1c2e5 ("cifs: Add support for root file systems")
Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-10-20 19:19:49 -05:00
Linus Torvalds
998d75510e Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton:
 "Rather a lot of fixes, almost all affecting mm/"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (26 commits)
  scripts/gdb: fix debugging modules on s390
  kernel/events/uprobes.c: only do FOLL_SPLIT_PMD for uprobe register
  mm/thp: allow dropping THP from page cache
  mm/vmscan.c: support removing arbitrary sized pages from mapping
  mm/thp: fix node page state in split_huge_page_to_list()
  proc/meminfo: fix output alignment
  mm/init-mm.c: include <linux/mman.h> for vm_committed_as_batch
  mm/filemap.c: include <linux/ramfs.h> for generic_file_vm_ops definition
  mm: include <linux/huge_mm.h> for is_vma_temporary_stack
  zram: fix race between backing_dev_show and backing_dev_store
  mm/memcontrol: update lruvec counters in mem_cgroup_move_account
  ocfs2: fix panic due to ocfs2_wq is null
  hugetlbfs: don't access uninitialized memmaps in pfn_range_valid_gigantic()
  mm: memblock: do not enforce current limit for memblock_phys* family
  mm: memcg: get number of pages on the LRU list in memcgroup base on lru_zone_size
  mm/gup: fix a misnamed "write" argument, and a related bug
  mm/gup_benchmark: add a missing "w" to getopt string
  ocfs2: fix error handling in ocfs2_setattr()
  mm: memcg/slab: fix panic in __free_slab() caused by premature memcg pointer release
  mm/memunmap: don't access uninitialized memmap in memunmap_pages()
  ...
2019-10-19 06:53:59 -04:00
Kirill A. Shutemov
2be5fbf9a9 proc/meminfo: fix output alignment
Patch series "Fixes for THP in page cache", v2.

This patch (of 5):

Add extra space for FileHugePages and FilePmdMapped, so the output is
aligned with other rows.

Link: http://lkml.kernel.org/r/20191017164223.2762148-2-songliubraving@fb.com
Fixes: 60fbf0ab5d ("mm,thp: stats for file backed THP")
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Tested-by: Song Liu <songliubraving@fb.com>
Acked-by: Yang Shi <yang.shi@linux.alibaba.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-19 06:32:32 -04:00
Yi Li
b918c43021 ocfs2: fix panic due to ocfs2_wq is null
mount.ocfs2 failed when reading ocfs2 filesystem superblock encounters
an error.  ocfs2_initialize_super() returns before allocating ocfs2_wq.
ocfs2_dismount_volume() triggers the following panic.

  Oct 15 16:09:27 cnwarekv-205120 kernel: On-disk corruption discovered.Please run fsck.ocfs2 once the filesystem is unmounted.
  Oct 15 16:09:27 cnwarekv-205120 kernel: (mount.ocfs2,22804,44): ocfs2_read_locked_inode:537 ERROR: status = -30
  Oct 15 16:09:27 cnwarekv-205120 kernel: (mount.ocfs2,22804,44): ocfs2_init_global_system_inodes:458 ERROR: status = -30
  Oct 15 16:09:27 cnwarekv-205120 kernel: (mount.ocfs2,22804,44): ocfs2_init_global_system_inodes:491 ERROR: status = -30
  Oct 15 16:09:27 cnwarekv-205120 kernel: (mount.ocfs2,22804,44): ocfs2_initialize_super:2313 ERROR: status = -30
  Oct 15 16:09:27 cnwarekv-205120 kernel: (mount.ocfs2,22804,44): ocfs2_fill_super:1033 ERROR: status = -30
  ------------[ cut here ]------------
  Oops: 0002 [#1] SMP NOPTI
  CPU: 1 PID: 11753 Comm: mount.ocfs2 Tainted: G  E
        4.14.148-200.ckv.x86_64 #1
  Hardware name: Sugon H320-G30/35N16-US, BIOS 0SSDX017 12/21/2018
  task: ffff967af0520000 task.stack: ffffa5f05484000
  RIP: 0010:mutex_lock+0x19/0x20
  Call Trace:
    flush_workqueue+0x81/0x460
    ocfs2_shutdown_local_alloc+0x47/0x440 [ocfs2]
    ocfs2_dismount_volume+0x84/0x400 [ocfs2]
    ocfs2_fill_super+0xa4/0x1270 [ocfs2]
    ? ocfs2_initialize_super.isa.211+0xf20/0xf20 [ocfs2]
    mount_bdev+0x17f/0x1c0
    mount_fs+0x3a/0x160

Link: http://lkml.kernel.org/r/1571139611-24107-1-git-send-email-yili@winhong.com
Signed-off-by: Yi Li <yilikernel@gmail.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-19 06:32:32 -04:00
Chengguang Xu
ce750f43f5 ocfs2: fix error handling in ocfs2_setattr()
Should set transfer_to[USRQUOTA/GRPQUOTA] to NULL on error case before
jumping to do dqput().

Link: http://lkml.kernel.org/r/20191010082349.1134-1-cgxu519@mykernel.net
Signed-off-by: Chengguang Xu <cgxu519@mykernel.net>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-19 06:32:32 -04:00
David Hildenbrand
aad5f69bc1 fs/proc/page.c: don't access uninitialized memmaps in fs/proc/page.c
There are three places where we access uninitialized memmaps, namely:
- /proc/kpagecount
- /proc/kpageflags
- /proc/kpagecgroup

We have initialized memmaps either when the section is online or when the
page was initialized to the ZONE_DEVICE.  Uninitialized memmaps contain
garbage and in the worst case trigger kernel BUGs, especially with
CONFIG_PAGE_POISONING.

For example, not onlining a DIMM during boot and calling /proc/kpagecount
with CONFIG_PAGE_POISONING:

  :/# cat /proc/kpagecount > tmp.test
  BUG: unable to handle page fault for address: fffffffffffffffe
  #PF: supervisor read access in kernel mode
  #PF: error_code(0x0000) - not-present page
  PGD 114616067 P4D 114616067 PUD 114618067 PMD 0
  Oops: 0000 [#1] SMP NOPTI
  CPU: 0 PID: 469 Comm: cat Not tainted 5.4.0-rc1-next-20191004+ #11
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.4
  RIP: 0010:kpagecount_read+0xce/0x1e0
  Code: e8 09 83 e0 3f 48 0f a3 02 73 2d 4c 89 e7 48 c1 e7 06 48 03 3d ab 51 01 01 74 1d 48 8b 57 08 480
  RSP: 0018:ffffa14e409b7e78 EFLAGS: 00010202
  RAX: fffffffffffffffe RBX: 0000000000020000 RCX: 0000000000000000
  RDX: 0000000000000001 RSI: 00007f76b5595000 RDI: fffff35645000000
  RBP: 00007f76b5595000 R08: 0000000000000001 R09: 0000000000000000
  R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000140000
  R13: 0000000000020000 R14: 00007f76b5595000 R15: ffffa14e409b7f08
  FS:  00007f76b577d580(0000) GS:ffff8f41bd400000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: fffffffffffffffe CR3: 0000000078960000 CR4: 00000000000006f0
  Call Trace:
   proc_reg_read+0x3c/0x60
   vfs_read+0xc5/0x180
   ksys_read+0x68/0xe0
   do_syscall_64+0x5c/0xa0
   entry_SYSCALL_64_after_hwframe+0x49/0xbe

For now, let's drop support for ZONE_DEVICE from the three pseudo files
in order to fix this.  To distinguish offline memory (with garbage
memmap) from ZONE_DEVICE memory with properly initialized memmaps, we
would have to check get_dev_pagemap() and pfn_zone_device_reserved()
right now.  The usage of both (especially, special casing devmem) is
frowned upon and needs to be reworked.

The fundamental issue we have is:

	if (pfn_to_online_page(pfn)) {
		/* memmap initialized */
	} else if (pfn_valid(pfn)) {
		/*
		 * ???
		 * a) offline memory. memmap garbage.
		 * b) devmem: memmap initialized to ZONE_DEVICE.
		 * c) devmem: reserved for driver. memmap garbage.
		 * (d) devmem: memmap currently initializing - garbage)
		 */
	}

We'll leave the pfn_zone_device_reserved() check in stable_page_flags()
in place as that function is also used from memory failure.  We now no
longer dump information about pages that are not in use anymore -
offline.

Link: http://lkml.kernel.org/r/20191009142435.3975-2-david@redhat.com
Fixes: f1dd2cd13c ("mm, memory_hotplug: do not associate hotadded memory to zones until online")	[visible after d0dc12e86b]
Signed-off-by: David Hildenbrand <david@redhat.com>
Reported-by: Qian Cai <cai@lca.pw>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Toshiki Fukasawa <t-fukasawa@vx.jp.nec.com>
Cc: Pankaj gupta <pagupta@redhat.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Anthony Yznaga <anthony.yznaga@oracle.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: <stable@vger.kernel.org>	[4.13+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-19 06:32:31 -04:00
Linus Torvalds
d418d07005 for-linus-2019-10-18
-----BEGIN PGP SIGNATURE-----
 
 iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAl2qbF0QHGF4Ym9lQGtl
 cm5lbC5kawAKCRD301j7KXHgptsuEADEKL8pta74uy50pl0t8l9fZ++U+wdIeEIW
 9uumpOEPnI2GpkG1sOyKWK6tl8InQLw6pAquP9MoT2BHXqFHk7NIgtvk67lwQeoc
 dRwklVfvOLAdnKzyfODqE9Fh9BgczZIuOLzgdtNqrPKqgJfFRCwN94Kj/r2tYuy7
 v+riK3A49u12dOLtjU6ciNgZ0m1iUX9s0+PFYVUXtJHU/1OYToQaKP+sgWiue0Ca
 VJP/L4MLYD0a7tfd92WAK7xWLsYWTDw1Gg20hXH/tV+IIDQ5+OXhu2s6PuqI7c0y
 cZqWHQHBDkZMQvT8+V+YqZtEa+xwVCom51prJEPasmdq3fGx+2sDC1HQiySao1ML
 wfFxZvFvY9fm6M7p2xsSNEcOmamrx1aLLyNSbjIvAqLUDYJWWS56BHsKyTU5Z+Jp
 RA9dpq8iR6ISaIAcFf0IB0pJSv1HEeHyo/ixlALqezBFJaMdhWy/M+dEbWKtix9M
 s19ozcpe+omN9+O0anlLtzKNgj2Xnjiwuu8mhVcqn6uG/p6GUOup+lNvTW/fig3I
 JBH8kObjYXL181V9rYVqFutnuqcf2HYqMvV2vzAmg4LYnPVUmU7HMj8zEpxc4N+f
 Evd77j0wXmY9S+4JERxaqQZuvKBEIkvM1rkk3N4NbNghfa7QL4aW+I9cWtuelPC2
 E+DK7if0Gg==
 =rvkw
 -----END PGP SIGNATURE-----

Merge tag 'for-linus-2019-10-18' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:

 - NVMe pull request from Keith that address deadlocks, double resets,
   memory leaks, and other regression.

 - Fixup elv_support_iosched() for bio based devices (Damien)

 - Fixup for the ahci PCS quirk (Dan)

 - Socket O_NONBLOCK handling fix for io_uring (me)

 - Timeout sequence io_uring fixes (yangerkun)

 - MD warning fix for parameter default_layout (Song)

 - blkcg activation fixes (Tejun)

 - blk-rq-qos node deletion fix (Tejun)

* tag 'for-linus-2019-10-18' of git://git.kernel.dk/linux-block:
  nvme-pci: Set the prp2 correctly when using more than 4k page
  io_uring: fix logic error in io_timeout
  io_uring: fix up O_NONBLOCK handling for sockets
  md/raid0: fix warning message for parameter default_layout
  libata/ahci: Fix PCS quirk application
  blk-rq-qos: fix first node deletion of rq_qos_del()
  blkcg: Fix multiple bugs in blkcg_activate_policy()
  io_uring: consider the overflow of sequence for timeout req
  nvme-tcp: fix possible leakage during error flow
  nvmet-loop: fix possible leakage during error flow
  block: Fix elv_support_iosched()
  nvme-tcp: Initialize sk->sk_ll_usec only with NET_RX_BUSY_POLL
  nvme: Wait for reset state when required
  nvme: Prevent resets during paused controller state
  nvme: Restart request timers in resetting state
  nvme: Remove ADMIN_ONLY state
  nvme-pci: Free tagset if no IO queues
  nvme: retain split access workaround for capability reads
  nvme: fix possible deadlock when nvme_update_formats fails
2019-10-18 22:29:36 -04:00
Linus Torvalds
b9959c7a34 filldir[64]: remove WARN_ON_ONCE() for bad directory entries
This was always meant to be a temporary thing, just for testing and to
see if it actually ever triggered.

The only thing that reported it was syzbot doing disk image fuzzing, and
then that warning is expected.  So let's just remove it before -rc4,
because the extra sanity testing should probably go to -stable, but we
don't want the warning to do so.

Reported-by: syzbot+3031f712c7ad5dd4d926@syzkaller.appspotmail.com
Fixes: 8a23eb804c ("Make filldir[64]() verify the directory entry filename is valid")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-18 18:41:16 -04:00
Linus Torvalds
6b95cf9b8b A future-proofing decoding fix from Jeff intended for stable and
a patch for a mostly benign race from Dongsheng.
 -----BEGIN PGP SIGNATURE-----
 
 iQFHBAABCAAxFiEEydHwtzie9C7TfviiSn/eOAIR84sFAl2qAEkTHGlkcnlvbW92
 QGdtYWlsLmNvbQAKCRBKf944AhHzi4mZB/9HMfEfZ8JC9keyVaJpAyvV8ufTR4qs
 4b8NNc0MDM01z1Z23G0o89b5M0WEDcGslh25plCifxyNIMa+L/lYKl8CTr7CLVQS
 qCEtNgJ7ibfM26v7rfHOlk6Nnd07/OmjcioaHu/R3bqEQmXpcWQg+aX9C6mPh/2f
 yzZTKZdKhTZfUyQQctuhNo9G+wD8K86DYT1XRbubPNQ3VtXKPuNH9rLhvLCZzbVA
 6FHW05A4mwSv80MsLgN6qLSKxv/+LjV/voHepH4HygqUKw2+1lwi9BC/4k7sprQs
 1jFONZ0p1sv/LdWwJYUyCpwj6d3NliXM0uvYxfyzKveWWCxb3l3gaWUS
 =7scd
 -----END PGP SIGNATURE-----

Merge tag 'ceph-for-5.4-rc4' of git://github.com/ceph/ceph-client

Pull ceph fixes from Ilya Dryomov:
 "A future-proofing decoding fix from Jeff intended for stable and a
  patch for a mostly benign race from Dongsheng"

* tag 'ceph-for-5.4-rc4' of git://github.com/ceph/ceph-client:
  rbd: cancel lock_dwork if the wait is interrupted
  ceph: just skip unrecognized info in ceph_reply_info_extra
2019-10-18 18:30:09 -04:00
yangerkun
8b07a65ad3 io_uring: fix logic error in io_timeout
If ctx->cached_sq_head < nxt_sq_head, we should add UINT_MAX to tmp, not
tmp_nxt.

Fixes: 5da0fb1ab3 ("io_uring: consider the overflow of sequence for timeout req")
Signed-off-by: yangerkun <yangerkun@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-10-17 15:49:15 -06:00
Jens Axboe
491381ce07 io_uring: fix up O_NONBLOCK handling for sockets
We've got two issues with the non-regular file handling for non-blocking
IO:

1) We don't want to re-do a short read in full for a non-regular file,
   as we can't just read the data again.
2) For non-regular files that don't support non-blocking IO attempts,
   we need to punt to async context even if the file is opened as
   non-blocking. Otherwise the caller always gets -EAGAIN.

Add two new request flags to handle these cases. One is just a cache
of the inode S_ISREG() status, the other tells io_uring that we always
need to punt this request to async context, even if REQ_F_NOWAIT is set.

Cc: stable@vger.kernel.org
Reported-by: Hrvoje Zeba <zeba.hrvoje@gmail.com>
Tested-by: Hrvoje Zeba <zeba.hrvoje@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-10-17 15:49:11 -06:00
Linus Torvalds
6e8ba0098e Changes since last update:
- Fix a timestamp signedness problem in the new bulkstat ioctl.
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEUzaAxoMeQq6m2jMV+H93GTRKtOsFAl2l7R8ACgkQ+H93GTRK
 tOtFnw/9GyBxDqODfne2puAb3nISogzVDVRxzo2Ip4fH+djQ8XF0nZgaVmdK45xm
 lD0VNCMT7tb7YA9rIKb+G8WdZDfq5XUs2QOR8RCqg2rCy5Kxww8B0e83ziJ/hz8C
 ebmfuBpNoV3Ul8I4vPN2Qb2nN2wHo8LqMi3GgK3nmv92xuL7Fignh3AxForHSFRz
 VUQF+canS5IQo2KkbKsP92X1r+nwTG/8GL3WNicm4BgeFHcZbMKJn32OSpZHUSGb
 RPEpWD1TAROhjOejFpEqEXmU8x8o0BtErgo3dBgGQTntrq9gOPgOuoot3cyweHZK
 JEtxglnIIbJs0B0sru9ZuN7RkoXZYJjDaTOU8uLst8dwVaoX2kw8siWjQimadKI4
 aI323yHpTTjuzZa2PQRU682fNyVNwcDfQnOss28xQG1wG9Pjxo39AZqhpgR1GtX4
 kgYBVr6oJ/5HrZ5KFghBnjE1+jx4F4axAhgKqmbsg712mZcr1EM4TlFfd/yX6+Sd
 ihHlgSeIiZk+2fthnUwRvPuGSYIimtUAXY5wgRzXnqmCFxy3rPafLo41pPkCcYV4
 wCHdh6YR1H0/wJ9K2iUMxKKrSdu4PcdaprlD7aX7j3u727gybqOqIhaK6GdlxQg8
 zyUZIGQEyR6uTpbtC4xNttZ3OcR5w5u7JjIn6TR3xIws4TkVMwU=
 =WVUx
 -----END PGP SIGNATURE-----

Merge tag 'xfs-5.4-fixes-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs fix from Darrick Wong:
 "The single fix converts the seconds field in the recently added XFS
  bulkstat structure to a signed 64-bit quantity.

  The structure layout doesn't change and so far there are no users of
  the ioctl to break because we only publish xfs ioctl interfaces
  through the XFS userspace development libraries, and we're still
  working on a 5.3 release"

* tag 'xfs-5.4-fixes-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: change the seconds fields in xfs_bulkstat to signed
2019-10-17 14:19:52 -07:00
Filipe Manana
ba0b084ac3 Btrfs: check for the full sync flag while holding the inode lock during fsync
We were checking for the full fsync flag in the inode before locking the
inode, which is racy, since at that that time it might not be set but
after we acquire the inode lock some other task set it. One case where
this can happen is on a system low on memory and some concurrent task
failed to allocate an extent map and therefore set the full sync flag on
the inode, to force the next fsync to work in full mode.

A consequence of missing the full fsync flag set is hitting the problems
fixed by commit 0c713cbab6 ("Btrfs: fix race between ranged fsync and
writeback of adjacent ranges"), BUG_ON() when dropping extents from a log
tree, hitting assertion failures at tree-log.c:copy_items() or all sorts
of weird inconsistencies after replaying a log due to file extents items
representing ranges that overlap.

So just move the check such that it's done after locking the inode and
before starting writeback again.

Fixes: 0c713cbab6 ("Btrfs: fix race between ranged fsync and writeback of adjacent ranges")
CC: stable@vger.kernel.org # 5.2+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-10-17 20:36:02 +02:00
Filipe Manana
c7967fc149 Btrfs: fix qgroup double free after failure to reserve metadata for delalloc
If we fail to reserve metadata for delalloc operations we end up releasing
the previously reserved qgroup amount twice, once explicitly under the
'out_qgroup' label by calling btrfs_qgroup_free_meta_prealloc() and once
again, under label 'out_fail', by calling btrfs_inode_rsv_release() with a
value of 'true' for its 'qgroup_free' argument, which results in
btrfs_qgroup_free_meta_prealloc() being called again, so we end up having
a double free.

Also if we fail to reserve the necessary qgroup amount, we jump to the
label 'out_fail', which calls btrfs_inode_rsv_release() and that in turns
calls btrfs_qgroup_free_meta_prealloc(), even though we weren't able to
reserve any qgroup amount. So we freed some amount we never reserved.

So fix this by removing the call to btrfs_inode_rsv_release() in the
failure path, since it's not necessary at all as we haven't changed the
inode's block reserve in any way at this point.

Fixes: c8eaeac7b7 ("btrfs: reserve delalloc metadata differently")
CC: stable@vger.kernel.org # 5.2+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-10-17 20:13:44 +02:00
Qu Wenruo
fd2b007eae btrfs: tracepoints: Fix wrong parameter order for qgroup events
[BUG]
For btrfs:qgroup_meta_reserve event, the trace event can output garbage:

  qgroup_meta_reserve: 9c7f6acc-b342-4037-bc47-7f6e4d2232d7: refroot=5(FS_TREE) type=DATA diff=2

The diff should always be alinged to sector size (4k), so there is
definitely something wrong.

[CAUSE]
For the wrong @diff, it's caused by wrong parameter order.
The correct parameters are:

  struct btrfs_root, s64 diff, int type.

However the parameters used are:

  struct btrfs_root, int type, s64 diff.

Fixes: 4ee0d8832c ("btrfs: qgroup: Update trace events for metadata reservation")
CC: stable@vger.kernel.org # 4.19+
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-10-17 14:09:31 +02:00
Qu Wenruo
8702ba9396 btrfs: qgroup: Always free PREALLOC META reserve in btrfs_delalloc_release_extents()
[Background]
Btrfs qgroup uses two types of reserved space for METADATA space,
PERTRANS and PREALLOC.

PERTRANS is metadata space reserved for each transaction started by
btrfs_start_transaction().
While PREALLOC is for delalloc, where we reserve space before joining a
transaction, and finally it will be converted to PERTRANS after the
writeback is done.

[Inconsistency]
However there is inconsistency in how we handle PREALLOC metadata space.

The most obvious one is:
In btrfs_buffered_write():
	btrfs_delalloc_release_extents(BTRFS_I(inode), reserve_bytes, true);

We always free qgroup PREALLOC meta space.

While in btrfs_truncate_block():
	btrfs_delalloc_release_extents(BTRFS_I(inode), blocksize, (ret != 0));

We only free qgroup PREALLOC meta space when something went wrong.

[The Correct Behavior]
The correct behavior should be the one in btrfs_buffered_write(), we
should always free PREALLOC metadata space.

The reason is, the btrfs_delalloc_* mechanism works by:
- Reserve metadata first, even it's not necessary
  In btrfs_delalloc_reserve_metadata()

- Free the unused metadata space
  Normally in:
  btrfs_delalloc_release_extents()
  |- btrfs_inode_rsv_release()
     Here we do calculation on whether we should release or not.

E.g. for 64K buffered write, the metadata rsv works like:

/* The first page */
reserve_meta:	num_bytes=calc_inode_reservations()
free_meta:	num_bytes=0
total:		num_bytes=calc_inode_reservations()
/* The first page caused one outstanding extent, thus needs metadata
   rsv */

/* The 2nd page */
reserve_meta:	num_bytes=calc_inode_reservations()
free_meta:	num_bytes=calc_inode_reservations()
total:		not changed
/* The 2nd page doesn't cause new outstanding extent, needs no new meta
   rsv, so we free what we have reserved */

/* The 3rd~16th pages */
reserve_meta:	num_bytes=calc_inode_reservations()
free_meta:	num_bytes=calc_inode_reservations()
total:		not changed (still space for one outstanding extent)

This means, if btrfs_delalloc_release_extents() determines to free some
space, then those space should be freed NOW.
So for qgroup, we should call btrfs_qgroup_free_meta_prealloc() other
than btrfs_qgroup_convert_reserved_meta().

The good news is:
- The callers are not that hot
  The hottest caller is in btrfs_buffered_write(), which is already
  fixed by commit 336a8bb8e3 ("btrfs: Fix wrong
  btrfs_delalloc_release_extents parameter"). Thus it's not that
  easy to cause false EDQUOT.

- The trans commit in advance for qgroup would hide the bug
  Since commit f5fef45936 ("btrfs: qgroup: Make qgroup async transaction
  commit more aggressive"), when btrfs qgroup metadata free space is slow,
  it will try to commit transaction and free the wrongly converted
  PERTRANS space, so it's not that easy to hit such bug.

[FIX]
So to fix the problem, remove the @qgroup_free parameter for
btrfs_delalloc_release_extents(), and always pass true to
btrfs_inode_rsv_release().

Reported-by: Filipe Manana <fdmanana@suse.com>
Fixes: 43b18595d6 ("btrfs: qgroup: Use separate meta reservation type for delalloc")
CC: stable@vger.kernel.org # 4.19+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-10-15 18:50:07 +02:00
Darrick J. Wong
5e0cd1ef64 xfs: change the seconds fields in xfs_bulkstat to signed
64-bit time is a signed quantity in the kernel, so the bulkstat
structure should reflect that.  Note that the structure size stays
the same and that we have not yet published userspace headers for this
new ioctl so there are no users to break.

Fixes: 7035f9724f ("xfs: introduce new v5 bulkstat structure")
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2019-10-15 08:46:07 -07:00
Jeff Layton
1d3f87233e ceph: just skip unrecognized info in ceph_reply_info_extra
In the future, we're going to want to extend the ceph_reply_info_extra
for create replies. Currently though, the kernel code doesn't accept an
extra blob that is larger than the expected data.

Change the code to skip over any unrecognized fields at the end of the
extra blob, rather than returning -EIO.

Cc: stable@vger.kernel.org
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-10-15 17:43:10 +02:00
yangerkun
5da0fb1ab3 io_uring: consider the overflow of sequence for timeout req
Now we recalculate the sequence of timeout with 'req->sequence =
ctx->cached_sq_head + count - 1', judge the right place to insert
for timeout_list by compare the number of request we still expected for
completion. But we have not consider about the situation of overflow:

1. ctx->cached_sq_head + count - 1 may overflow. And a bigger count for
the new timeout req can have a small req->sequence.

2. cached_sq_head of now may overflow compare with before req. And it
will lead the timeout req with small req->sequence.

This overflow will lead to the misorder of timeout_list, which can lead
to the wrong order of the completion of timeout_list. Fix it by reuse
req->submit.sequence to store the count, and change the logic of
inserting sort in io_timeout.

Signed-off-by: yangerkun <yangerkun@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-10-15 08:55:50 -06:00
Miklos Szeredi
3f22c74671 virtio-fs: don't show mount options
Virtio-fs does not accept any mount options, so it's confusing and wrong to
show any in /proc/mounts.

Reported-by: Stefan Hajnoczi <stefanha@redhat.com> 
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2019-10-15 16:11:41 +02:00
David Sterba
80ed4548d0 btrfs: don't needlessly create extent-refs kernel thread
The patch 32b593bfcb ("Btrfs: remove no longer used function to run
delayed refs asynchronously") removed the async delayed refs but the
thread has been created, without any use. Remove it to avoid resource
consumption.

Fixes: 32b593bfcb ("Btrfs: remove no longer used function to run delayed refs asynchronously")
CC: stable@vger.kernel.org # 5.2+
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-10-15 15:43:29 +02:00
Randy Dunlap
b46ec1da5e fs/fs-writeback.c: fix kernel-doc warning
Fix kernel-doc warning in fs/fs-writeback.c:

  fs/fs-writeback.c:913: warning: Excess function parameter 'nr_pages' description in 'cgroup_writeback_by_id'

Link: http://lkml.kernel.org/r/756645ac-0ce8-d47e-d30a-04d9e4923a4f@infradead.org
Fixes: d62241c7a4 ("writeback, memcg: Implement cgroup_writeback_by_id()")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-14 15:04:01 -07:00
Randy Dunlap
8e88bfba77 fs/libfs.c: fix kernel-doc warning
Fix kernel-doc warning in fs/libfs.c:

  fs/libfs.c:496: warning: Excess function parameter 'available' description in 'simple_write_end'

Link: http://lkml.kernel.org/r/5fc9d70b-e377-0ec9-066a-970d49579041@infradead.org
Fixes: ad2a722f19 ("libfs: Open code simple_commit_write into only user")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Boaz Harrosh <boazh@netapp.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-14 15:04:01 -07:00
Randy Dunlap
c70d868f27 fs/direct-io.c: fix kernel-doc warning
Fix kernel-doc warning in fs/direct-io.c:

  fs/direct-io.c:258: warning: Excess function parameter 'offset' description in 'dio_complete'

Also, don't mark this function as having kernel-doc notation since it is
not exported.

Link: http://lkml.kernel.org/r/97908511-4328-4a56-17fe-f43a1d7aa470@infradead.org
Fixes: 6d544bb4d9 ("dio: centralize completion in dio_complete()")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Zach Brown <zab@zabbo.net>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-14 15:04:01 -07:00
Vivek Goyal
112e72373d virtio-fs: Change module name to virtiofs.ko
We have been calling it virtio_fs and even file name is virtio_fs.c. Module
name is virtio_fs.ko but when registering file system user is supposed to
specify filesystem type as "virtiofs".

Masayoshi Mizuma reported that he specified filesytem type as "virtio_fs"
and got this warning on console.

  ------------[ cut here ]------------
  request_module fs-virtio_fs succeeded, but still no fs?
  WARNING: CPU: 1 PID: 1234 at fs/filesystems.c:274 get_fs_type+0x12c/0x138
  Modules linked in: ... virtio_fs fuse virtio_net net_failover ...
  CPU: 1 PID: 1234 Comm: mount Not tainted 5.4.0-rc1 #1

So looks like kernel could find the module virtio_fs.ko but could not find
filesystem type after that.

It probably is better to rename module name to virtiofs.ko so that above
warning goes away in case user ends up specifying wrong fs name.

Reported-by: Masayoshi Mizuma <msys.mizuma@gmail.com>
Suggested-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Tested-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2019-10-14 10:20:33 +02:00
Linus Torvalds
d4615e5a46 A few tracing fixes:
- Removed locked down from tracefs itself and moved it to the trace
    directory. Having the open functions there do the lockdown checks.
 
  - Fixed a few races with opening an instance file and the instance being
    deleted (Discovered during the locked down updates). Kept separate
    from the clean up code such that they can be backported to stable
    easier.
 
  - Cleaned up and consolidated the checks done when opening a trace
    file, as there were multiple checks that need to be done, and it
    did not make sense having them done in each open instance.
 
  - Fixed a regression in the record mcount code.
 
  - Small hw_lat detector tracer fixes.
 
  - A trace_pipe read fix due to not initializing trace_seq.
 -----BEGIN PGP SIGNATURE-----
 
 iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCXaNhphQccm9zdGVkdEBn
 b29kbWlzLm9yZwAKCRAp5XQQmuv6quDIAP4v08ARNdIh+r+c4AOBm3xsOuE/d9GB
 I56ydnskm+x2JQD6Ap9ivXe9yDBIErFeHNtCoq7pM8YDI4YoYIB30N0GfwM=
 =7oAu
 -----END PGP SIGNATURE-----

Merge tag 'trace-v5.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "A few tracing fixes:

   - Remove lockdown from tracefs itself and moved it to the trace
     directory. Have the open functions there do the lockdown checks.

   - Fix a few races with opening an instance file and the instance
     being deleted (Discovered during the lockdown updates). Kept
     separate from the clean up code such that they can be backported to
     stable easier.

   - Clean up and consolidated the checks done when opening a trace
     file, as there were multiple checks that need to be done, and it
     did not make sense having them done in each open instance.

   - Fix a regression in the record mcount code.

   - Small hw_lat detector tracer fixes.

   - A trace_pipe read fix due to not initializing trace_seq"

* tag 'trace-v5.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Initialize iter->seq after zeroing in tracing_read_pipe()
  tracing/hwlat: Don't ignore outer-loop duration when calculating max_latency
  tracing/hwlat: Report total time spent in all NMIs during the sample
  recordmcount: Fix nop_mcount() function
  tracing: Do not create tracefs files if tracefs lockdown is in effect
  tracing: Add locked_down checks to the open calls of files created for tracefs
  tracing: Add tracing_check_open_get_tr()
  tracing: Have trace events system open call tracing_open_generic_tr()
  tracing: Get trace_array reference for available_tracers files
  ftrace: Get a reference counter for the trace_array on filter files
  tracefs: Revert ccbd54ff54 ("tracefs: Restrict tracefs when the kernel is locked down")
2019-10-13 14:47:10 -07:00
Linus Torvalds
b27528b027 for-linus-20191012
-----BEGIN PGP SIGNATURE-----
 
 iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAl2iBvAQHGF4Ym9lQGtl
 cm5lbC5kawAKCRD301j7KXHgpvokEACaUozc0Y2L99CqJcRtoH8cwIAimjKTFSmi
 UKijO/w11uc9xCIOospkM8iseRbpP/oCIwfYyVROi4LniPB1TSyQJoLF/MELeqIi
 lOSg8RrXzC22h5+QG3BR5VO55me3MwIXmJLMMWXbh7FAuUg+wepVwHwzZBurd1Pz
 C1wG8NU758AmqJdSGclUbdLLwTBkR+fXoi2EHfdbsBMqGmdZ5VRzCLx70grDcxq2
 S9gt+2+diME6o6p1wko+m9pdhUdEy7epPE50K4SA+DU06I77OZpTdSAPilPyQHei
 +3HDslzjCyos5/Ay+7hWl42jvyZ+x6GI5VcDLMTcMZsmxLy/WObDB4zcAixJrDV0
 c7XWnwCCs2wMXYMsu0ASbkU32mcQ/Ik8CrX0W3/tP1aZBW2LZnOHvXYbybzpbgbo
 QY47t3jz21uzF5kplBGxqaY1sPmLxp5V0vQmj9eN+Y7T+hiR/UgWKO/5B4CGNJe0
 BQkXNl5cZAtqxmSE8AxlpOla7z6beZUljdhFc7K8cMDdhoatRgm2MBh2G9BB1ayo
 VwHc1qLcvInpQrGiC4l5H/F8jrEs/PglknFSs1wlsav1gXA69J0cHA7LY6Czweaw
 mkiKr7jA6duBBn6MRUThF5sBMFWYuxp3B/BA4wfDJsSfCmyhWN+OZlsDaEVrzk7o
 /XK2Ew9R2Q==
 =PUeL
 -----END PGP SIGNATURE-----

Merge tag 'for-linus-20191012' of git://git.kernel.dk/linux-block

Pull io_uring fix from Jens Axboe:
 "Single small fix for a regression in the sequence logic for linked
  commands"

* tag 'for-linus-20191012' of git://git.kernel.dk/linux-block:
  io_uring: fix sequence logic for timeout requests
2019-10-13 08:15:35 -07:00
Steven Rostedt (VMware)
bf8e602186 tracing: Do not create tracefs files if tracefs lockdown is in effect
If on boot up, lockdown is activated for tracefs, don't even bother creating
the files. This can also prevent instances from being created if lockdown is
in effect.

Link: http://lkml.kernel.org/r/CAHk-=whC6Ji=fWnjh2+eS4b15TnbsS4VPVtvBOwCy1jjEG_JHQ@mail.gmail.com

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2019-10-12 20:49:07 -04:00
Steven Rostedt (VMware)
3ed270b129 tracefs: Revert ccbd54ff54 ("tracefs: Restrict tracefs when the kernel is locked down")
Running the latest kernel through my "make instances" stress tests, I
triggered the following bug (with KASAN and kmemleak enabled):

mkdir invoked oom-killer:
gfp_mask=0x40cd0(GFP_KERNEL|__GFP_COMP|__GFP_RECLAIMABLE), order=0,
oom_score_adj=0
CPU: 1 PID: 2229 Comm: mkdir Not tainted 5.4.0-rc2-test #325
Hardware name: MSI MS-7823/CSM-H87M-G43 (MS-7823), BIOS V1.6 02/22/2014
Call Trace:
 dump_stack+0x64/0x8c
 dump_header+0x43/0x3b7
 ? trace_hardirqs_on+0x48/0x4a
 oom_kill_process+0x68/0x2d5
 out_of_memory+0x2aa/0x2d0
 __alloc_pages_nodemask+0x96d/0xb67
 __alloc_pages_node+0x19/0x1e
 alloc_slab_page+0x17/0x45
 new_slab+0xd0/0x234
 ___slab_alloc.constprop.86+0x18f/0x336
 ? alloc_inode+0x2c/0x74
 ? irq_trace+0x12/0x1e
 ? tracer_hardirqs_off+0x1d/0xd7
 ? __slab_alloc.constprop.85+0x21/0x53
 __slab_alloc.constprop.85+0x31/0x53
 ? __slab_alloc.constprop.85+0x31/0x53
 ? alloc_inode+0x2c/0x74
 kmem_cache_alloc+0x50/0x179
 ? alloc_inode+0x2c/0x74
 alloc_inode+0x2c/0x74
 new_inode_pseudo+0xf/0x48
 new_inode+0x15/0x25
 tracefs_get_inode+0x23/0x7c
 ? lookup_one_len+0x54/0x6c
 tracefs_create_file+0x53/0x11d
 trace_create_file+0x15/0x33
 event_create_dir+0x2a3/0x34b
 __trace_add_new_event+0x1c/0x26
 event_trace_add_tracer+0x56/0x86
 trace_array_create+0x13e/0x1e1
 instance_mkdir+0x8/0x17
 tracefs_syscall_mkdir+0x39/0x50
 ? get_dname+0x31/0x31
 vfs_mkdir+0x78/0xa3
 do_mkdirat+0x71/0xb0
 sys_mkdir+0x19/0x1b
 do_fast_syscall_32+0xb0/0xed

I bisected this down to the addition of the proxy_ops into tracefs for
lockdown. It appears that the allocation of the proxy_ops and then freeing
it in the destroy_inode callback, is causing havoc with the memory system.
Reading the documentation about destroy_inode and talking with Linus about
this, this is buggy and wrong. When defining the destroy_inode() method, it
is expected that the destroy_inode() will also free the inode, and not just
the extra allocations done in the creation of the inode. The faulty commit
causes a memory leak of the inode data structure when they are deleted.

Instead of allocating the proxy_ops (and then having to free it) the checks
should be done by the open functions themselves, and not hack into the
tracefs directory. First revert the tracefs updates for locked_down and then
later we can add the locked_down checks in the kernel/trace files.

Link: http://lkml.kernel.org/r/20191011135458.7399da44@gandalf.local.home

Fixes: ccbd54ff54 ("tracefs: Restrict tracefs when the kernel is locked down")
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2019-10-12 20:36:50 -04:00
Linus Torvalds
1c0cc5f1ae NFS Client Bugfixes for Linux 5.4-rc3
Stable bugfixes:
 - Fix O_DIRECT accounting of number of bytes read/written # v4.1+
 
 Other fixes:
 - Fix nfsi->nrequests count error on nfs_inode_remove_request()
 - Remove redundant mirror tracking in O_DIRECT
 - Fix leak of clp->cl_acceptor string
 - Fix race to sk_err after xs_error_report
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEEnZ5MQTpR7cLU7KEp18tUv7ClQOsFAl2g7gAACgkQ18tUv7Cl
 QOtMSxAAyQj2BjzUviR+clFe4X6betnqse6wHr4gnA3EEyo5OiwYk/U/bevejOXW
 mYevz+VkYVVaN4l8SLT/ZJEH7cJCbJUjy/cf6vvHdL0E+sE+41s0Qrl0wrX2NOyT
 cgm90VTzwFCZe9e9i2jOehgyJ0zkc0+9H2YySYIsiw0MPHVOzR+t8lgoD9mVsYAn
 d4L5VLOo0hP/dhYfS2e/SkESR75rZFR2tZbL2ClKmGTYVHoLpliAtCUepqV9kUpw
 FkAA5PXosa0xewXCUg6Lvhac7Urh37OrnLtedIe4fa7qGGqB2U3CavB6W6ojQhKJ
 Brgk1/wSVhag3vVCCplwscB5jpOly6azUbs2mcYhdKZ5zWzTkPL1F/KZkZSnkZU6
 LpZPk2/Lltko2TUviSCwDJwVzWqqRMlvz7OyXv1tVw53yFP1Fr7tNTxEe4XOnbxG
 8pbLqBjwHp8Iyerh0JSJ21quPJSVIfgTKjWbMTjrH4yh/FdzUkeAktvwZT4LDEMx
 uKFH8FQPrp/oqQ4wc49gpxLGqNCYjK51Hk3ceym47d1xcDww8yFeaana5D3VERmF
 CCuJfqkUxFmeFle8TGBHlmvVrb8K/W1WZPC/dcmMAEQSq07fIlZYvUHTHO8pGOkp
 ZZqNtbLyH2yIRR9FuzlrpmEqJPZMGNYySthcEXrYzVKDDDbVaII=
 =XDan
 -----END PGP SIGNATURE-----

Merge tag 'nfs-for-5.4-2' of git://git.linux-nfs.org/projects/anna/linux-nfs

Pull NFS client bugfixes from Anna Schumaker:
 "Stable bugfixes:
   - Fix O_DIRECT accounting of number of bytes read/written # v4.1+

  Other fixes:
   - Fix nfsi->nrequests count error on nfs_inode_remove_request()
   - Remove redundant mirror tracking in O_DIRECT
   - Fix leak of clp->cl_acceptor string
   - Fix race to sk_err after xs_error_report"

* tag 'nfs-for-5.4-2' of git://git.linux-nfs.org/projects/anna/linux-nfs:
  SUNRPC: fix race to sk_err after xs_error_report
  NFSv4: Fix leak of clp->cl_acceptor string
  NFS: Remove redundant mirror tracking in O_DIRECT
  NFS: Fix O_DIRECT accounting of number of bytes read/written
  nfs: Fix nfsi->nrequests count error on nfs_inode_remove_request
2019-10-11 14:28:59 -07:00
Linus Torvalds
c6ad7c3ce9 Eighsmall SMB3 fixes, 4 for stable
-----BEGIN PGP SIGNATURE-----
 
 iQGzBAABCgAdFiEE6fsu8pdIjtWE/DpLiiy9cAdyT1EFAl2gzCMACgkQiiy9cAdy
 T1F5aAv+M5OLmFX6OOuCQNYWqku8N9K78C3+bvdpDINYceozhPgKX1/+RO3z8rcR
 v+cK0b+R6tXVmpTbyo1t7QW3UVzHiJLEaGKjafbHNBjOM87wYkW7D9Uc6u6GSYDp
 7cgXqmMDM+26FftBwxaxLjbjY6YAN/3V66j5Zt6I+lTb+8YC2DO1ihprwaMmGAm2
 hDGYpvrW9KPjTB23+dC5Z9/YfG6EGXOvXl4z20JajCVoKD/70KdpDwVLNo2JuPsL
 hsgV38xmUd7PtFXeFtStPjN9VpNOf4sp29xmWnjJVGaVx4hnhzcyiKmiW2o5VkKM
 14PEUd/N26/+E6VXuY1eP6L8O9EwkZISNZUXWBI/zyyiVedBfSJVeSXTU4NyqB0g
 B7WMnWYbJ73AeOsq9iVrcribrRPDtAcyK5UKMWEkrYhB/BIylg1vWUhn6B5bPqv0
 3Q9TR+pSmEifkAk3ZSu5CjKNEgpNj6lpFoIcmkdp3Gg/qzeWvcFUTJTnxZZbxSqP
 qtmZ3d8z
 =mXpP
 -----END PGP SIGNATURE-----

Merge tag '5.4-rc2-smb3' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "Eight small SMB3 fixes, four for stable, and important fix for the
  recent regression introduced by filesystem timestamp range patches"

* tag '5.4-rc2-smb3' of git://git.samba.org/sfrench/cifs-2.6:
  CIFS: Force reval dentry if LOOKUP_REVAL flag is set
  CIFS: Force revalidate inode when dentry is stale
  smb3: Fix regression in time handling
  smb3: remove noisy debug message and minor cleanup
  CIFS: Gracefully handle QueryInfo errors during open
  cifs: use cifsInodeInfo->open_file_lock while iterating to avoid a panic
  fs: cifs: mute -Wunused-const-variable message
  smb3: cleanup some recent endian errors spotted by updated sparse
2019-10-11 14:01:13 -07:00
Qu Wenruo
4b654acdae btrfs: block-group: Fix a memory leak due to missing btrfs_put_block_group()
In btrfs_read_block_groups(), if we have an invalid block group which
has mixed type (DATA|METADATA) while the fs doesn't have MIXED_GROUPS
feature, we error out without freeing the block group cache.

This patch will add the missing btrfs_put_block_group() to prevent
memory leak.

Note for stable backports: the file to patch in versions <= 5.3 is
fs/btrfs/extent-tree.c

Fixes: 49303381f1 ("Btrfs: bail out if block group has different mixed flag")
CC: stable@vger.kernel.org # 4.9+
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-10-11 21:27:51 +02:00
Filipe Manana
44db1216ef Btrfs: add missing extents release on file extent cluster relocation error
If we error out when finding a page at relocate_file_extent_cluster(), we
need to release the outstanding extents counter on the relocation inode,
set by the previous call to btrfs_delalloc_reserve_metadata(), otherwise
the inode's block reserve size can never decrease to zero and metadata
space is leaked. Therefore add a call to btrfs_delalloc_release_extents()
in case we can't find the target page.

Fixes: 8b62f87bad ("Btrfs: rework outstanding_extents")
CC: stable@vger.kernel.org # 4.19+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-10-11 19:49:11 +02:00
Linus Torvalds
297cbcccc2 for-linus-20191010
-----BEGIN PGP SIGNATURE-----
 
 iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAl2f5MIQHGF4Ym9lQGtl
 cm5lbC5kawAKCRD301j7KXHgpvscD/4v8E1s1rt6JwqM0Fa27UjRdhfGnc8ad8vs
 fD7rf3ZmLkoM1apVopMcAscUH726wU4qbxwEUDEntxxv2wJHuZdSZ64zhFJ17uis
 uJ2pF4MpK/m6DnHZu/SAU4t9aU+l6SBqX0tS1bFycecPgGRk46jrVX5tNJggt0Fy
 hqmx3ACWbkGiFDERT2AAQ69WHfmzeI9aUjx3jJY2eLnK7OjjEpyoEBs0j/AHl3ep
 kydhItU5NSFCv94X7vmZy/dvQ5hE4/1HTFfg79fOZcywQi1AN5DafKxiM2kgaSJ0
 jW58i+AFVtUPysNpVsxvjAgqGwDX/UJkOkggPd6V8/6LMfEvBKY4YNXlUEbqTN3Y
 pqn19/cgdKHaQpHKqwettcQujc71kry/yHsaudD+g2fi0efYi3d4qxIp9XA0TF03
 z6jzp8Hfo2SKbwapIFPa7Wqj86ZpbBxtROibCA17WKSNzn0UR3pJmEigo4l364ow
 nJpvZChLDHZXjovgzISmUnbR+O1yP0+ZnI9b7kgNp0UV4SI5ajf6f2T7667dcQs0
 J1GNt4QvqPza3R0z1SuoEi6tbc3GyMj7NZyIseNOXR/NtqXEWtiNvDIuZqs6Wn/T
 4GhaF0Mjqc17B3UEkdU1z09HL0JR40vUrGYE4lDxHhPWd0YngDGJJX2pZG2Y0WBp
 VQ20AzijzQ==
 =wZnt
 -----END PGP SIGNATURE-----

Merge tag 'for-linus-20191010' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:

 - Fix wbt performance regression introduced with the blk-rq-qos
   refactoring (Harshad)

 - Fix io_uring fileset removal inadvertently killing the workqueue (me)

 - Fix io_uring typo in linked command nonblock submission (Pavel)

 - Remove spurious io_uring wakeups on request free (Pavel)

 - Fix null_blk zoned command error return (Keith)

 - Don't use freezable workqueues for backing_dev, also means we can
   revert a previous libata hack (Mika)

 - Fix nbd sysfs mutex dropped too soon at removal time (Xiubo)

* tag 'for-linus-20191010' of git://git.kernel.dk/linux-block:
  nbd: fix possible sysfs duplicate warning
  null_blk: Fix zoned command return code
  io_uring: only flush workqueues on fileset removal
  io_uring: remove wait loop spurious wakeups
  blk-wbt: fix performance regression in wbt scale_up/scale_down
  Revert "libata, freezer: avoid block device removal while system is frozen"
  bdi: Do not use freezable workqueue
  io_uring: fix reversed nonblock flag for link submission
2019-10-11 08:45:32 -07:00
Jens Axboe
7adf4eaf60 io_uring: fix sequence logic for timeout requests
We have two ways a request can be deferred:

1) It's a regular request that depends on another one
2) It's a timeout that tracks completions

We have a shared helper to determine whether to defer, and that
attempts to make the right decision based on the request. But we
only have some of this information in the caller. Un-share the
two timeout/defer helpers so the caller can use the right one.

Fixes: 5262f56798 ("io_uring: IORING_OP_TIMEOUT support")
Reported-by: yangerkun <yangerkun@huawei.com>
Reviewed-by: Jackie Liu <liuyun01@kylinos.cn>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-10-10 21:42:58 -06:00
Chuck Lever
1047ec8683 NFSv4: Fix leak of clp->cl_acceptor string
Our client can issue multiple SETCLIENTID operations to the same
server in some circumstances. Ensure that calls to
nfs4_proc_setclientid() after the first one do not overwrite the
previously allocated cl_acceptor string.

unreferenced object 0xffff888461031800 (size 32):
  comm "mount.nfs", pid 2227, jiffies 4294822467 (age 1407.749s)
  hex dump (first 32 bytes):
    6e 66 73 40 6b 6c 69 6d 74 2e 69 62 2e 31 30 31  nfs@klimt.ib.101
    35 67 72 61 6e 67 65 72 2e 6e 65 74 00 00 00 00  5granger.net....
  backtrace:
    [<00000000ab820188>] __kmalloc+0x128/0x176
    [<00000000eeaf4ec8>] gss_stringify_acceptor+0xbd/0x1a7 [auth_rpcgss]
    [<00000000e85e3382>] nfs4_proc_setclientid+0x34e/0x46c [nfsv4]
    [<000000003d9cf1fa>] nfs40_discover_server_trunking+0x7a/0xed [nfsv4]
    [<00000000b81c3787>] nfs4_discover_server_trunking+0x81/0x244 [nfsv4]
    [<000000000801b55f>] nfs4_init_client+0x1b0/0x238 [nfsv4]
    [<00000000977daf7f>] nfs4_set_client+0xfe/0x14d [nfsv4]
    [<0000000053a68a2a>] nfs4_create_server+0x107/0x1db [nfsv4]
    [<0000000088262019>] nfs4_remote_mount+0x2c/0x59 [nfsv4]
    [<00000000e84a2fd0>] legacy_get_tree+0x2d/0x4c
    [<00000000797e947c>] vfs_get_tree+0x20/0xc7
    [<00000000ecabaaa8>] fc_mount+0xe/0x36
    [<00000000f15fafc2>] vfs_kern_mount+0x74/0x8d
    [<00000000a3ff4e26>] nfs_do_root_mount+0x8a/0xa3 [nfsv4]
    [<00000000d1c2b337>] nfs4_try_mount+0x58/0xad [nfsv4]
    [<000000004c9bddee>] nfs_fs_mount+0x820/0x869 [nfs]

Fixes: f11b2a1cfb ("nfs4: copy acceptor name from context ... ")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-10-10 16:14:02 -04:00
Linus Torvalds
9e208aa06c Changes since last update:
- Fix a rounding error in the fallocate code
 - Minor code cleanups
 - Make sure to zero memory buffers before formatting metadata blocks
 - Fix a few places where we forgot to log an inode metadata update
 - Remove broken error handling that tried to clean up after a failure
   but still got it wrong
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEUzaAxoMeQq6m2jMV+H93GTRKtOsFAl2eA4EACgkQ+H93GTRK
 tOsosxAAgOgEvFrIZQDnzio+yQ9OysiFWCiiT3b+91f8v1v3MNBXP2EEyLA4zZEK
 TlgaFvNCoTO2Q16r+PKCSDFVBwEw/8t2YEylS6X6/GKBUGc/BDBZ5ROZdzQH3Wng
 a98M7GaQektTUqQuKlv3fHiL1Fucp0FonCG3wiuNw6/vzH6RxxwOTTkd2F67Zkn6
 9N7bRoEPh7d6h1Ah7myf/ONA1f3mGEiFuvyb3/KCZPr1WKDFFflzhUboJnMq8Br5
 N55Bq3uoc4+btS4eVxr3XjEXD1zImBiXq7gcEoCRDZNfv+/2VcaDYRkXQu40NbOI
 psH+1xy9lQvLSSbCm6zI1enpfVAm3qxUVktp9G4i4dKtjJQL7HzuvW7ckdzcRaav
 QKbkTmgGQFFI5yLpNHVN+zs+exdkwG6whNyY3Frt5yNh8bH8yRZxrb7YMzfIkNOl
 8O1Tl0ZFGzJtjggXPhAKCoGz2yz8oO2G2JzejfWvdyrku2heyGLktnm98Uk/Sx0g
 90hHTC8KYfLm8r0PuH+lv5c/AwTDr4prJO2wQkU2ZDCCLxXjNsHa3vuxMDmK6PRV
 Y+ryOP6OcyQkB+BkY3/HOlxjen71Z91hdMFNVajRmVwNuFzHCK3yHhsMitBPDEnx
 PnotQQihRmVKP8hw7/3zPfLoDEwO+hPa19JbqUFLXp7xl/OzF6A=
 =MFMd
 -----END PGP SIGNATURE-----

Merge tag 'xfs-5.4-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs fixes from Darrick Wong:
 "A couple of small code cleanups and bug fixes for rounding errors,
  metadata logging errors, and an extra layer of safeguards against
  leaking memory contents.

   - Fix a rounding error in the fallocate code

   - Minor code cleanups

   - Make sure to zero memory buffers before formatting metadata blocks

   - Fix a few places where we forgot to log an inode metadata update

   - Remove broken error handling that tried to clean up after a failure
     but still got it wrong"

* tag 'xfs-5.4-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: move local to extent inode logging into bmap helper
  xfs: remove broken error handling on failed attr sf to leaf change
  xfs: log the inode on directory sf to block format change
  xfs: assure zeroed memory buffers for certain kmem allocations
  xfs: removed unused error variable from xchk_refcountbt_rec
  xfs: remove unused flags arg from xfs_get_aghdr_buf()
  xfs: Fix tail rounding in xfs_alloc_file_space()
2019-10-10 11:47:16 -07:00
Linus Torvalds
f8779876d4 for-5.4-rc2-tag
-----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEE8rQSAMVO+zA4DBdWxWXV+ddtWDsFAl2fQkoACgkQxWXV+ddt
 WDsXgA/+OpORcroqswa5V/AB5NgSMv08QfBtL7en7cUA2cGbrTt0lAoixIesCeGA
 7y4umlx7zWDhrG0NFv8E21xxkMzK72/YQnN0C6ZwRCi+ZbPSDlpMCwSNV9b6oVt4
 t9mJQ2kNZ80wj9W7jtoyiiWZ2OBccWywKBYr+BXybha5BliSd1XbpWMv90lODQHc
 1oH1FOphPAf+nSEtW4g0BV8UHy1n1+7TqjEHDilj0TuHlO0MHsR2FQcsRnMBv5H/
 CcEH3+870pUOjvm/l1OAdIrzrnH6UsXKHnOmJpYZIAQdG4xtHq/d6O9sfQMZK/Af
 VMXuju558kGOvrYdgffYa0HuW3P6c8q5BeEtGAZwjGsQS5GxmW63et/x+HIEl4RU
 4SWMfD592GK1/yQn31NWGav7Olkr4L0Eh9iqfKk2nWayTV+pqs8NgkGumkoNB66n
 WJs2m2WwKvZzj1Ys9ilRzo17qt2U/m4eLQtbut3m5eYCpzvo38PDrqOVqKTZG/dc
 nG1JBJNk+yjV+RkOO0gnQ8/zzooEGvMhVIx5iq52tWjvxnvOGSVv9QAAkKrbMoOX
 kn/b3heL57Z+kilUU3Zd0GvVif+awIgOj+PmAevR+w3MLoJ2gLfWb7qcONdHyFPk
 jK7rsuP737fyHpZ1tvJyfTt4Lk/u1UbApKrO4QIku1r9IJmmu20=
 =zpDj
 -----END PGP SIGNATURE-----

Merge tag 'for-5.4-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs fixes from David Sterba:
 "A few more stabitly fixes, one build warning fix.

   - fix inode allocation under NOFS context

   - fix leak in fiemap due to concurrent append writes

   - fix log-root tree updates

   - fix balance convert of single profile on 32bit architectures

   - silence false positive warning on old GCCs (code moved in rc1)"

* tag 'for-5.4-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: silence maybe-uninitialized warning in clone_range
  btrfs: fix uninitialized ret in ref-verify
  btrfs: allocate new inode in NOFS context
  btrfs: fix balance convert to single on 32-bit host CPUs
  btrfs: fix incorrect updating of log root tree
  Btrfs: fix memory leak due to concurrent append writes with fiemap
2019-10-10 08:30:51 -07:00
Linus Torvalds
ad338d0543 Merge branch 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull dcache_readdir() fixes from Al Viro:
 "The couple of patches you'd been OK with; no hlist conversion yet, and
  cursors are still in the list of children"

[ Al is referring to future work to avoid some nasty O(n**2) behavior
  with the readdir cursors when you have lots of concurrent readdirs.

  This is just a fix for a race with a trivial cleanup   - Linus ]

* 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  libfs: take cursors out of list when moving past the end of directory
  Fix the locking in dcache_readdir() and friends
2019-10-10 08:26:58 -07:00
Linus Torvalds
015c21ba59 Merge branch 'work.mount3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull mount fixes from Al Viro:
 "A couple of regressions from the mount series"

* 'work.mount3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  vfs: add missing blkdev_put() in get_tree_bdev()
  shmem: fix LSM options parsing
2019-10-10 08:16:44 -07:00
Al Viro
26b6c98433 libfs: take cursors out of list when moving past the end of directory
that eliminates the last place where we accessed the tail of ->d_subdirs

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-10-09 22:57:30 -04:00
Ian Kent
6fcf0c72e4 vfs: add missing blkdev_put() in get_tree_bdev()
Is there are a couple of missing blkdev_put() in get_tree_bdev()?

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-10-09 22:53:57 -04:00
Jens Axboe
8a99734081 io_uring: only flush workqueues on fileset removal
We should not remove the workqueue, we just need to ensure that the
workqueues are synced. The workqueues are torn down on ctx removal.

Cc: stable@vger.kernel.org
Fixes: 6b06314c47 ("io_uring: add file set registration")
Reported-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-10-09 15:13:47 -06:00
Brian Foster
aeea4b75f0 xfs: move local to extent inode logging into bmap helper
The callers of xfs_bmap_local_to_extents_empty() log the inode
external to the function, yet this function is where the on-disk
format value is updated. Push the inode logging down into the
function itself to help prevent future mistakes.

Note that internal bmap callers track the inode logging flags
independently and thus may log the inode core twice due to this
change. This is harmless, so leave this code around for consistency
with the other attr fork conversion functions.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-10-09 08:54:30 -07:00
Brian Foster
603efebd67 xfs: remove broken error handling on failed attr sf to leaf change
xfs_attr_shortform_to_leaf() attempts to put the shortform fork back
together after a failed attempt to convert from shortform to leaf
format. While this code reallocates and copies back the shortform
attr fork data, it never resets the inode format field back to local
format. Further, now that the inode is properly logged after the
initial switch from local format, any error that triggers the
recovery code will eventually abort the transaction and shutdown the
fs. Therefore, remove the broken and unnecessary error handling
code.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-10-09 08:54:30 -07:00
Brian Foster
0b10d8a89f xfs: log the inode on directory sf to block format change
When a directory changes from shortform (sf) to block format, the sf
format is copied to a temporary buffer, the inode format is modified
and the updated format filled with the dentries from the temporary
buffer. If the inode format is modified and attempt to grow the
inode fails (due to I/O error, for example), it is possible to
return an error while leaving the directory in an inconsistent state
and with an otherwise clean transaction. This results in corruption
of the associated directory and leads to xfs_dabuf_map() errors as
subsequent lookups cannot accurately determine the format of the
directory. This problem is reproduced occasionally by generic/475.

The fundamental problem is that xfs_dir2_sf_to_block() changes the
on-disk inode format without logging the inode. The inode is
eventually logged by the bmapi layer in the common case, but error
checking introduces the possibility of failing the high level
request before this happens.

Update both of the dir2 and attr callers of
xfs_bmap_local_to_extents_empty() to log the inode core as
consistent with the bmap local to extent format change codepath.
This ensures that any subsequent errors after the format has changed
cause the transaction to abort.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-10-09 08:54:30 -07:00
Trond Myklebust
0b57484779 NFS: Remove redundant mirror tracking in O_DIRECT
We no longer need the extra mirror length tracking in the O_DIRECT code,
as we are able to track the maximum contiguous length in dreq->max_count.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-10-09 11:45:59 -04:00
Trond Myklebust
031d73ed76 NFS: Fix O_DIRECT accounting of number of bytes read/written
When a series of O_DIRECT reads or writes are truncated, either due to
eof or due to an error, then we should return the number of contiguous
bytes that were received/sent starting at the offset specified by the
application.

Currently, we are failing to correctly check contiguity, and so we're
failing the generic/465 in xfstests when the race between the read
and write RPCs causes the file to get extended while the 2 reads are
outstanding. If the first read RPC call wins the race and returns with
eof set, we should treat the second read RPC as being truncated.

Reported-by: Su Yanjun <suyj.fnst@cn.fujitsu.com>
Fixes: 1ccbad9f9f ("nfs: fix DIO good bytes calculation")
Cc: stable@vger.kernel.org # 4.1+
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-10-09 11:45:59 -04:00
Pavel Shilovsky
0b3d0ef984 CIFS: Force reval dentry if LOOKUP_REVAL flag is set
Mark inode for force revalidation if LOOKUP_REVAL flag is set.
This tells the client to actually send a QueryInfo request to
the server to obtain the latest metadata in case a directory
or a file were changed remotely. Only do that if the client
doesn't have a lease for the file to avoid unneeded round
trips to the server.

Cc: <stable@vger.kernel.org>
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-10-09 00:10:50 -05:00
Pavel Shilovsky
c82e5ac7fe CIFS: Force revalidate inode when dentry is stale
Currently the client indicates that a dentry is stale when inode
numbers or type types between a local inode and a remote file
don't match. If this is the case attributes is not being copied
from remote to local, so, it is already known that the local copy
has stale metadata. That's why the inode needs to be marked for
revalidation in order to tell the VFS to lookup the dentry again
before openning a file. This prevents unexpected stale errors
to be returned to the user space when openning a file.

Cc: <stable@vger.kernel.org>
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-10-09 00:10:50 -05:00
Steve French
d4cfbf04b2 smb3: Fix regression in time handling
Fixes: cb7a69e605 ("cifs: Initialize filesystem timestamp ranges")

Only very old servers (e.g. OS/2 and DOS) did not support
DCE TIME (100 nanosecond granularity).  Fix the checks used
to set minimum and maximum times.

Fixes xfstest generic/258 (on 5.4-rc1 and later)

CC: Deepa Dinamani <deepa.kernel@gmail.com>
Acked-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
2019-10-09 00:10:38 -05:00
Steve French
d0959b080b smb3: remove noisy debug message and minor cleanup
Message was intended only for developer temporary build
In addition cleanup two minor warnings noticed by Coverity
and a trivial change to workaround a sparse warning

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
2019-10-08 18:19:40 -07:00
Austin Kim
431d39887d btrfs: silence maybe-uninitialized warning in clone_range
GCC throws warning message as below:

‘clone_src_i_size’ may be used uninitialized in this function
[-Wmaybe-uninitialized]
 #define IS_ALIGNED(x, a)  (((x) & ((typeof(x))(a) - 1)) == 0)
                       ^
fs/btrfs/send.c:5088:6: note: ‘clone_src_i_size’ was declared here
 u64 clone_src_i_size;
   ^
The clone_src_i_size is only used as call-by-reference
in a call to get_inode_info().

Silence the warning by initializing clone_src_i_size to 0.

Note that the warning is a false positive and reported by older versions
of GCC (eg. 7.x) but not eg 9.x. As there have been numerous people, the
patch is applied. Setting clone_src_i_size to 0 does not otherwise make
sense and would not do any action in case the code changes in the future.

Signed-off-by: Austin Kim <austindh.kim@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ add note ]
Signed-off-by: David Sterba <dsterba@suse.com>
2019-10-08 13:14:55 +02:00
Pavel Begunkov
6805b32ec2 io_uring: remove wait loop spurious wakeups
Any changes interesting to tasks waiting in io_cqring_wait() are
commited with io_cqring_ev_posted(). However, io_ring_drop_ctx_refs()
also tries to do that but with no reason, that means spurious wakeups
every io_free_req() and io_uring_enter().

Just use percpu_ref_put() instead.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-10-07 21:16:24 -06:00
Linus Torvalds
eda57a0e42 Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton:
 "The usual shower of hotfixes.

  Chris's memcg patches aren't actually fixes - they're mature but a few
  niggling review issues were late to arrive.

  The ocfs2 fixes are quite old - those took some time to get reviewer
  attention.

  Subsystems affected by this patch series: ocfs2, hotfixes, mm/memcg,
  mm/slab-generic"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm, sl[aou]b: guarantee natural alignment for kmalloc(power-of-two)
  mm, sl[ou]b: improve memory accounting
  mm, memcg: make scan aggression always exclude protection
  mm, memcg: make memory.emin the baseline for utilisation determination
  mm, memcg: proportional memory.{low,min} reclaim
  mm/vmpressure.c: fix a signedness bug in vmpressure_register_event()
  mm/page_alloc.c: fix a crash in free_pages_prepare()
  mm/z3fold.c: claim page in the beginning of free
  kernel/sysctl.c: do not override max_threads provided by userspace
  memcg: only record foreign writebacks with dirty pages when memcg is not disabled
  mm: fix -Wmissing-prototypes warnings
  writeback: fix use-after-free in finish_writeback_work()
  mm/memremap: drop unused SECTION_SIZE and SECTION_MASK
  panic: ensure preemption is disabled during panic()
  fs: ocfs2: fix a possible null-pointer dereference in ocfs2_info_scan_inode_alloc()
  fs: ocfs2: fix a possible null-pointer dereference in ocfs2_write_end_nolock()
  fs: ocfs2: fix possible null-pointer dereferences in ocfs2_xa_prepare_entry()
  ocfs2: clear zero in unaligned direct IO
2019-10-07 16:04:19 -07:00
Tejun Heo
8e00c4e9dd writeback: fix use-after-free in finish_writeback_work()
finish_writeback_work() reads @done->waitq after decrementing
@done->cnt.  However, once @done->cnt reaches zero, @done may be freed
(from stack) at any moment and @done->waitq can contain something
unrelated by the time finish_writeback_work() tries to read it.  This
led to the following crash.

  "BUG: kernel NULL pointer dereference, address: 0000000000000002"
  #PF: supervisor write access in kernel mode
  #PF: error_code(0x0002) - not-present page
  PGD 0 P4D 0
  Oops: 0002 [#1] SMP DEBUG_PAGEALLOC
  CPU: 40 PID: 555153 Comm: kworker/u98:50 Kdump: loaded Not tainted
  ...
  Workqueue: writeback wb_workfn (flush-btrfs-1)
  RIP: 0010:_raw_spin_lock_irqsave+0x10/0x30
  Code: 48 89 d8 5b c3 e8 50 db 6b ff eb f4 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 53 9c 5b fa 31 c0 ba 01 00 00 00 <f0> 0f b1 17 75 05 48 89 d8 5b c3 89 c6 e8 fe ca 6b ff eb f2 66 90
  RSP: 0018:ffffc90049b27d98 EFLAGS: 00010046
  RAX: 0000000000000000 RBX: 0000000000000246 RCX: 0000000000000000
  RDX: 0000000000000001 RSI: 0000000000000003 RDI: 0000000000000002
  RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
  R10: ffff889fff407600 R11: ffff88ba9395d740 R12: 000000000000e300
  R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000
  FS:  0000000000000000(0000) GS:ffff88bfdfa00000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 0000000000000002 CR3: 0000000002409005 CR4: 00000000001606e0
  Call Trace:
   __wake_up_common_lock+0x63/0xc0
   wb_workfn+0xd2/0x3e0
   process_one_work+0x1f5/0x3f0
   worker_thread+0x2d/0x3d0
   kthread+0x111/0x130
   ret_from_fork+0x1f/0x30

Fix it by reading and caching @done->waitq before decrementing
@done->cnt.

Link: http://lkml.kernel.org/r/20190924010631.GH2233839@devbig004.ftw2.facebook.com
Fixes: 5b9cce4c7e ("writeback: Generalize and expose wb_completion")
Signed-off-by: Tejun Heo <tj@kernel.org>
Debugged-by: Chris Mason <clm@fb.com>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Cc: Jan Kara <jack@suse.cz>
Cc: <stable@vger.kernel.org>	[5.2+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-07 15:47:19 -07:00
Jia-Ju Bai
2abb7d3b12 fs: ocfs2: fix a possible null-pointer dereference in ocfs2_info_scan_inode_alloc()
In ocfs2_info_scan_inode_alloc(), there is an if statement on line 283
to check whether inode_alloc is NULL:

    if (inode_alloc)

When inode_alloc is NULL, it is used on line 287:

    ocfs2_inode_lock(inode_alloc, &bh, 0);
        ocfs2_inode_lock_full_nested(inode, ...)
            struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);

Thus, a possible null-pointer dereference may occur.

To fix this bug, inode_alloc is checked on line 286.

This bug is found by a static analysis tool STCheck written by us.

Link: http://lkml.kernel.org/r/20190726033717.32359-1-baijiaju1990@gmail.com
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-07 15:47:19 -07:00
Jia-Ju Bai
583fee3e12 fs: ocfs2: fix a possible null-pointer dereference in ocfs2_write_end_nolock()
In ocfs2_write_end_nolock(), there are an if statement on lines 1976,
2047 and 2058, to check whether handle is NULL:

    if (handle)

When handle is NULL, it is used on line 2045:

	ocfs2_update_inode_fsync_trans(handle, inode, 1);
        oi->i_sync_tid = handle->h_transaction->t_tid;

Thus, a possible null-pointer dereference may occur.

To fix this bug, handle is checked before calling
ocfs2_update_inode_fsync_trans().

This bug is found by a static analysis tool STCheck written by us.

Link: http://lkml.kernel.org/r/20190726033705.32307-1-baijiaju1990@gmail.com
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-07 15:47:19 -07:00
Jia-Ju Bai
56e94ea132 fs: ocfs2: fix possible null-pointer dereferences in ocfs2_xa_prepare_entry()
In ocfs2_xa_prepare_entry(), there is an if statement on line 2136 to
check whether loc->xl_entry is NULL:

    if (loc->xl_entry)

When loc->xl_entry is NULL, it is used on line 2158:

    ocfs2_xa_add_entry(loc, name_hash);
        loc->xl_entry->xe_name_hash = cpu_to_le32(name_hash);
        loc->xl_entry->xe_name_offset = cpu_to_le16(loc->xl_size);

and line 2164:

    ocfs2_xa_add_namevalue(loc, xi);
        loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len);
        loc->xl_entry->xe_name_len = xi->xi_name_len;

Thus, possible null-pointer dereferences may occur.

To fix these bugs, if loc-xl_entry is NULL, ocfs2_xa_prepare_entry()
abnormally returns with -EINVAL.

These bugs are found by a static analysis tool STCheck written by us.

[akpm@linux-foundation.org: remove now-unused ocfs2_xa_add_entry()]
Link: http://lkml.kernel.org/r/20190726101447.9153-1-baijiaju1990@gmail.com
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-07 15:47:19 -07:00
Jia Guo
7a243c82ea ocfs2: clear zero in unaligned direct IO
Unused portion of a part-written fs-block-sized block is not set to zero
in unaligned append direct write.This can lead to serious data
inconsistencies.

Ocfs2 manage disk with cluster size(for example, 1M), part-written in
one cluster will change the cluster state from UN-WRITTEN to WRITTEN,
VFS(function dio_zero_block) doesn't do the cleaning because bh's state
is not set to NEW in function ocfs2_dio_wr_get_block when we write a
WRITTEN cluster.  For example, the cluster size is 1M, file size is 8k
and we direct write from 14k to 15k, then 12k~14k and 15k~16k will
contain dirty data.

We have to deal with two cases:
 1.The starting position of direct write is outside the file.
 2.The starting position of direct write is located in the file.

We need set bh's state to NEW in the first case.  In the second case, we
need mapped twice because bh's state of area out file should be set to
NEW while area in file not.

[akpm@linux-foundation.org: coding style fixes]
Link: http://lkml.kernel.org/r/5292e287-8f1a-fd4a-1a14-661e555e0bed@huawei.com
Signed-off-by: Jia Guo <guojia12@huawei.com>
Reviewed-by: Yiwen Jiang <jiangyiwen@huawei.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <joseph.qi@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-07 15:47:19 -07:00
Linus Torvalds
c512c69187 uaccess: implement a proper unsafe_copy_to_user() and switch filldir over to it
In commit 9f79b78ef7 ("Convert filldir[64]() from __put_user() to
unsafe_put_user()") I made filldir() use unsafe_put_user(), which
improves code generation on x86 enormously.

But because we didn't have a "unsafe_copy_to_user()", the dirent name
copy was also done by hand with unsafe_put_user() in a loop, and it
turns out that a lot of other architectures didn't like that, because
unlike x86, they have various alignment issues.

Most non-x86 architectures trap and fix it up, and some (like xtensa)
will just fail unaligned put_user() accesses unconditionally.  Which
makes that "copy using put_user() in a loop" not work for them at all.

I could make that code do explicit alignment etc, but the architectures
that don't like unaligned accesses also don't really use the fancy
"user_access_begin/end()" model, so they might just use the regular old
__copy_to_user() interface.

So this commit takes that looping implementation, turns it into the x86
version of "unsafe_copy_to_user()", and makes other architectures
implement the unsafe copy version as __copy_to_user() (the same way they
do for the other unsafe_xyz() accessor functions).

Note that it only does this for the copying _to_ user space, and we
still don't have a unsafe version of copy_from_user().

That's partly because we have no current users of it, but also partly
because the copy_from_user() case is slightly different and cannot
efficiently be implemented in terms of a unsafe_get_user() loop (because
gcc can't do asm goto with outputs).

It would be trivial to do this using "rep movsb", which would work
really nicely on newer x86 cores, but really badly on some older ones.

Al Viro is looking at cleaning up all our user copy routines to make
this all a non-issue, but for now we have this simple-but-stupid version
for x86 that works fine for the dirent name copy case because those
names are short strings and we simply don't need anything fancier.

Fixes: 9f79b78ef7 ("Convert filldir[64]() from __put_user() to unsafe_put_user()")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Reported-and-tested-by: Tony Luck <tony.luck@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-07 12:56:48 -07:00
Pavel Shilovsky
30573a82fb CIFS: Gracefully handle QueryInfo errors during open
Currently if the client identifies problems when processing
metadata returned in CREATE response, the open handle is being
leaked. This causes multiple problems like a file missing a lease
break by that client which causes high latencies to other clients
accessing the file. Another side-effect of this is that the file
can't be deleted.

Fix this by closing the file after the client hits an error after
the file was opened and the open descriptor wasn't returned to
the user space. Also convert -ESTALE to -EOPENSTALE to allow
the VFS to revalidate a dentry and retry the open.

Cc: <stable@vger.kernel.org>
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-10-06 22:05:28 -05:00
Dave Wysochanski
cb248819d2 cifs: use cifsInodeInfo->open_file_lock while iterating to avoid a panic
Commit 487317c994 ("cifs: add spinlock for the openFileList to
cifsInodeInfo") added cifsInodeInfo->open_file_lock spin_lock to protect
the openFileList, but missed a few places where cifs_inode->openFileList
was enumerated.  Change these remaining tcon->open_file_lock to
cifsInodeInfo->open_file_lock to avoid panic in is_size_safe_to_change.

[17313.245641] RIP: 0010:is_size_safe_to_change+0x57/0xb0 [cifs]
[17313.245645] Code: 68 40 48 89 ef e8 19 67 b7 f1 48 8b 43 40 48 8d 4b 40 48 8d 50 f0 48 39 c1 75 0f eb 47 48 8b 42 10 48 8d 50 f0 48 39 c1 74 3a <8b> 80 88 00 00 00 83 c0 01 a8 02 74 e6 48 89 ef c6 07 00 0f 1f 40
[17313.245649] RSP: 0018:ffff94ae1baefa30 EFLAGS: 00010202
[17313.245654] RAX: dead000000000100 RBX: ffff88dc72243300 RCX: ffff88dc72243340
[17313.245657] RDX: dead0000000000f0 RSI: 00000000098f7940 RDI: ffff88dd3102f040
[17313.245659] RBP: ffff88dd3102f040 R08: 0000000000000000 R09: ffff94ae1baefc40
[17313.245661] R10: ffffcdc8bb1c4e80 R11: ffffcdc8b50adb08 R12: 00000000098f7940
[17313.245663] R13: ffff88dc72243300 R14: ffff88dbc8f19600 R15: ffff88dc72243428
[17313.245667] FS:  00007fb145485700(0000) GS:ffff88dd3e000000(0000) knlGS:0000000000000000
[17313.245670] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[17313.245672] CR2: 0000026bb46c6000 CR3: 0000004edb110003 CR4: 00000000007606e0
[17313.245753] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[17313.245756] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[17313.245759] PKRU: 55555554
[17313.245761] Call Trace:
[17313.245803]  cifs_fattr_to_inode+0x16b/0x580 [cifs]
[17313.245838]  cifs_get_inode_info+0x35c/0xa60 [cifs]
[17313.245852]  ? kmem_cache_alloc_trace+0x151/0x1d0
[17313.245885]  cifs_open+0x38f/0x990 [cifs]
[17313.245921]  ? cifs_revalidate_dentry_attr+0x3e/0x350 [cifs]
[17313.245953]  ? cifsFileInfo_get+0x30/0x30 [cifs]
[17313.245960]  ? do_dentry_open+0x132/0x330
[17313.245963]  do_dentry_open+0x132/0x330
[17313.245969]  path_openat+0x573/0x14d0
[17313.245974]  do_filp_open+0x93/0x100
[17313.245979]  ? __check_object_size+0xa3/0x181
[17313.245986]  ? audit_alloc_name+0x7e/0xd0
[17313.245992]  do_sys_open+0x184/0x220
[17313.245999]  do_syscall_64+0x5b/0x1b0

Fixes: 487317c994 ("cifs: add spinlock for the openFileList to cifsInodeInfo")

CC: Stable <stable@vger.kernel.org>
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-10-06 22:04:57 -05:00
Austin Kim
dd19c106a3 fs: cifs: mute -Wunused-const-variable message
After 'Initial git repository build' commit,
'mapping_table_ERRHRD' variable has not been used.

So 'mapping_table_ERRHRD' const variable could be removed
to mute below warning message:

   fs/cifs/netmisc.c:120:40: warning: unused variable 'mapping_table_ERRHRD' [-Wunused-const-variable]
   static const struct smb_to_posix_error mapping_table_ERRHRD[] = {
                                           ^
Signed-off-by: Austin Kim <austindh.kim@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2019-10-06 22:04:35 -05:00
Steve French
52870d5048 smb3: cleanup some recent endian errors spotted by updated sparse
Now that sparse has been fixed, it spotted a couple recent minor
endian errors (and removed one additional sparse warning).

Thanks to Luc Van Oostenryck for his help fixing sparse.

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
2019-10-06 22:04:29 -05:00
Bill O'Donnell
3219e8cf0d xfs: assure zeroed memory buffers for certain kmem allocations
Guarantee zeroed memory buffers for cases where potential memory
leak to disk can occur. In these cases, kmem_alloc is used and
doesn't zero the buffer, opening the possibility of information
leakage to disk.

Use existing infrastucture (xfs_buf_allocate_memory) to obtain
the already zeroed buffer from kernel memory.

This solution avoids the performance issue that would occur if a
wholesale change to replace kmem_alloc with kmem_zalloc was done.

Signed-off-by: Bill O'Donnell <billodo@redhat.com>
[darrick: fix bitwise complaint about kmflag_mask]
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-10-06 15:39:06 -07:00
Aliasgar Surti
d5cc14d9f9 xfs: removed unused error variable from xchk_refcountbt_rec
Removed unused error variable. Instead of using error variable,
returned the value directly as it wasn't updated.

Signed-off-by: Aliasgar Surti <aliasgar.surti500@gmail.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-10-06 15:39:05 -07:00
Eric Sandeen
6374ca0397 xfs: remove unused flags arg from xfs_get_aghdr_buf()
The flags arg is always passed as zero, so remove it.

(xfs_buf_get_uncached takes flags to support XBF_NO_IOACCT for
the sb, but that should never be relevant for xfs_get_aghdr_buf)

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-10-06 15:39:05 -07:00
Max Reitz
e093c4be76 xfs: Fix tail rounding in xfs_alloc_file_space()
To ensure that all blocks touched by the range [offset, offset + count)
are allocated, we need to calculate the block count from the difference
of the range end (rounded up) and the range start (rounded down).

Before this patch, we just round up the byte count, which may lead to
unaligned ranges not being fully allocated:

$ touch test_file
$ block_size=$(stat -fc '%S' test_file)
$ fallocate -o $((block_size / 2)) -l $block_size test_file
$ xfs_bmap test_file
test_file:
        0: [0..7]: 1396264..1396271
        1: [8..15]: hole

There should not be a hole there.  Instead, the first two blocks should
be fully allocated.

With this patch applied, the result is something like this:

$ touch test_file
$ block_size=$(stat -fc '%S' test_file)
$ fallocate -o $((block_size / 2)) -l $block_size test_file
$ xfs_bmap test_file
test_file:
        0: [0..15]: 11024..11039

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-10-06 15:39:05 -07:00
Linus Torvalds
b212921b13 elf: don't use MAP_FIXED_NOREPLACE for elf executable mappings
In commit 4ed2863951 ("fs, elf: drop MAP_FIXED usage from elf_map") we
changed elf to use MAP_FIXED_NOREPLACE instead of MAP_FIXED for the
executable mappings.

Then, people reported that it broke some binaries that had overlapping
segments from the same file, and commit ad55eac74f ("elf: enforce
MAP_FIXED on overlaying elf segments") re-instated MAP_FIXED for some
overlaying elf segment cases.  But only some - despite the summary line
of that commit, it only did it when it also does a temporary brk vma for
one obvious overlapping case.

Now Russell King reports another overlapping case with old 32-bit x86
binaries, which doesn't trigger that limited case.  End result: we had
better just drop MAP_FIXED_NOREPLACE entirely, and go back to MAP_FIXED.

Yes, it's a sign of old binaries generated with old tool-chains, but we
do pride ourselves on not breaking existing setups.

This still leaves MAP_FIXED_NOREPLACE in place for the load_elf_interp()
and the old load_elf_library() use-cases, because nobody has reported
breakage for those. Yet.

Note that in all the cases seen so far, the overlapping elf sections
seem to be just re-mapping of the same executable with different section
attributes.  We could possibly introduce a new MAP_FIXED_NOFILECHANGE
flag or similar, which acts like NOREPLACE, but allows just remapping
the same executable file using different protection flags.

It's not clear that would make a huge difference to anything, but if
people really hate that "elf remaps over previous maps" behavior, maybe
at least a more limited form of remapping would alleviate some concerns.

Alternatively, we should take a look at our elf_map() logic to see if we
end up not mapping things properly the first time.

In the meantime, this is the minimal "don't do that then" patch while
people hopefully think about it more.

Reported-by: Russell King <linux@armlinux.org.uk>
Fixes: 4ed2863951 ("fs, elf: drop MAP_FIXED usage from elf_map")
Fixes: ad55eac74f ("elf: enforce  MAP_FIXED on overlaying elf segments")
Cc: Michal Hocko <mhocko@suse.com>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-06 13:53:27 -07:00
Linus Torvalds
4f11918ab9 Merge branch 'readdir' (readdir speedup and sanity checking)
This makes getdents() and getdents64() do sanity checking on the
pathname that it gives to user space.  And to mitigate the performance
impact of that, it first cleans up the way it does the user copying, so
that the code avoids doing the SMAP/PAN updates between each part of the
dirent structure write.

I really wanted to do this during the merge window, but didn't have
time.  The conversion of filldir to unsafe_put_user() is something I've
had around for years now in a private branch, but the extra pathname
checking finally made me clean it up to the point where it is mergable.

It's worth noting that the filename validity checking really should be a
bit smarter: it would be much better to delay the error reporting until
the end of the readdir, so that non-corrupted filenames are still
returned.  But that involves bigger changes, so let's see if anybody
actually hits the corrupt directory entry case before worrying about it
further.

* branch 'readdir':
  Make filldir[64]() verify the directory entry filename is valid
  Convert filldir[64]() from __put_user() to unsafe_put_user()
2019-10-05 12:03:27 -07:00
Linus Torvalds
8a23eb804c Make filldir[64]() verify the directory entry filename is valid
This has been discussed several times, and now filesystem people are
talking about doing it individually at the filesystem layer, so head
that off at the pass and just do it in getdents{64}().

This is partially based on a patch by Jann Horn, but checks for NUL
bytes as well, and somewhat simplified.

There's also commentary about how it might be better if invalid names
due to filesystem corruption don't cause an immediate failure, but only
an error at the end of the readdir(), so that people can still see the
filenames that are ok.

There's also been discussion about just how much POSIX strictly speaking
requires this since it's about filesystem corruption.  It's really more
"protect user space from bad behavior" as pointed out by Jann.  But
since Eric Biederman looked up the POSIX wording, here it is for context:

 "From readdir:

   The readdir() function shall return a pointer to a structure
   representing the directory entry at the current position in the
   directory stream specified by the argument dirp, and position the
   directory stream at the next entry. It shall return a null pointer
   upon reaching the end of the directory stream. The structure dirent
   defined in the <dirent.h> header describes a directory entry.

  From definitions:

   3.129 Directory Entry (or Link)

   An object that associates a filename with a file. Several directory
   entries can associate names with the same file.

  ...

   3.169 Filename

   A name consisting of 1 to {NAME_MAX} bytes used to name a file. The
   characters composing the name may be selected from the set of all
   character values excluding the slash character and the null byte. The
   filenames dot and dot-dot have special meaning. A filename is
   sometimes referred to as a 'pathname component'."

Note that I didn't bother adding the checks to any legacy interfaces
that nobody uses.

Also note that if this ends up being noticeable as a performance
regression, we can fix that to do a much more optimized model that
checks for both NUL and '/' at the same time one word at a time.

We haven't really tended to optimize 'memchr()', and it only checks for
one pattern at a time anyway, and we really _should_ check for NUL too
(but see the comment about "soft errors" in the code about why it
currently only checks for '/')

See the CONFIG_DCACHE_WORD_ACCESS case of hash_name() for how the name
lookup code looks for pathname terminating characters in parallel.

Link: https://lore.kernel.org/lkml/20190118161440.220134-2-jannh@google.com/
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Jann Horn <jannh@google.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-05 12:00:36 -07:00
Linus Torvalds
9f79b78ef7 Convert filldir[64]() from __put_user() to unsafe_put_user()
We really should avoid the "__{get,put}_user()" functions entirely,
because they can easily be mis-used and the original intent of being
used for simple direct user accesses no longer holds in a post-SMAP/PAN
world.

Manually optimizing away the user access range check makes no sense any
more, when the range check is generally much cheaper than the "enable
user accesses" code that the __{get,put}_user() functions still need.

So instead of __put_user(), use the unsafe_put_user() interface with
user_access_{begin,end}() that really does generate better code these
days, and which is generally a nicer interface.  Under some loads, the
multiple user writes that filldir() does are actually quite noticeable.

This also makes the dirent name copy use unsafe_put_user() with a couple
of macros.  We do not want to make function calls with SMAP/PAN
disabled, and the code this generates is quite good when the
architecture uses "asm goto" for unsafe_put_user() like x86 does.

Note that this doesn't bother with the legacy cases.  Nobody should use
them anyway, so performance doesn't really matter there.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-05 12:00:36 -07:00
Linus Torvalds
c4bd70e8c9 for-linus-2019-10-03
-----BEGIN PGP SIGNATURE-----
 
 iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAl2WrkYQHGF4Ym9lQGtl
 cm5lbC5kawAKCRD301j7KXHgpjf1D/9wy2L/yAXA/KLQkwDZ2kn3tMtzMrsv6bOJ
 4UTdlLWKH2ihGg69iAE5f19iQSeNmqqXxBz0VvIBpFR7TqcRbGe0d9iVtoOsDhpZ
 c1OvQ2Ey35Xx1T2w6uMh0llgeWY2J/gJkY64unUxwUBUZwNOPA8ZjxqeXcMQmyAt
 sYmXpNLCT/f4YTYOYDgzoh5960TsCB/H+m/bLEVRvr0MaonvlaBUKRcysQikDFCQ
 yobzDmlSJqGKqlFJ2fnRVSkJC0BmBE5p8Ric9HHiUOT8BO31079IHUGbkbSh/csH
 0yPipNaYNMv+Hr0t9pgfcNbAt2weMK5HFgtpQwv8Frl4xjvBSWDS5fQesCVDjkZt
 +ROeOvQtjfeKtLy5PCu6BJwYpu8iYG9eGF8zxBQ4FBHM3tghcVhqssaNbfrVOW+u
 YXYbAuLMkLwKlmJ+6WBiVIMefyF59ue3+UJGECiCrj/BrgxUyw8HcGKwpKEAZSok
 VFGDukL0Y3flnoO/gyOf0GFaD5Uovr1sx82DCz05B/XEMfkqFMJRGkbyZBarJL69
 9QrnyGpF4rwtfg+usR1PmJ+9/oY/ypSk8N9MAIkoK9e1YIexxvBiXAf0k8AxuDyC
 uPuOiQgKcqUr3aF+ivao8dQB9NiK1bJGc4pqBPPN4ZYRSjMSfBT/cms4IeUyj0K6
 sokcB1p+CQ==
 =vKVl
 -----END PGP SIGNATURE-----

Merge tag 'for-linus-2019-10-03' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:

 - Mandate timespec64 for the io_uring timeout ABI (Arnd)

 - Set of NVMe changes via Sagi:
     - controller removal race fix from Balbir
     - quirk additions from Gabriel and Jian-Hong
     - nvme-pci power state save fix from Mario
     - Add 64bit user commands (for 64bit registers) from Marta
     - nvme-rdma/nvme-tcp fixes from Max, Mark and Me
     - Minor cleanups and nits from James, Dan and John

 - Two s390 dasd fixes (Jan, Stefan)

 - Have loop change block size in DIO mode (Martijn)

 - paride pg header ifdef guard (Masahiro)

 - Two blk-mq queue scheduler tweaks, fixing an ordering issue on zoned
   devices and suboptimal performance on others (Ming)

* tag 'for-linus-2019-10-03' of git://git.kernel.dk/linux-block: (22 commits)
  block: sed-opal: fix sparse warning: convert __be64 data
  block: sed-opal: fix sparse warning: obsolete array init.
  block: pg: add header include guard
  Revert "s390/dasd: Add discard support for ESE volumes"
  s390/dasd: Fix error handling during online processing
  io_uring: use __kernel_timespec in timeout ABI
  loop: change queue block size to match when using DIO
  blk-mq: apply normal plugging for HDD
  blk-mq: honor IO scheduler for multiqueue devices
  nvme-rdma: fix possible use-after-free in connect timeout
  nvme: Move ctrl sqsize to generic space
  nvme: Add ctrl attributes for queue_count and sqsize
  nvme: allow 64-bit results in passthru commands
  nvme: Add quirk for Kingston NVME SSD running FW E8FK11.T
  nvmet-tcp: remove superflous check on request sgl
  Added QUIRKs for ADATA XPG SX8200 Pro 512GB
  nvme-rdma: Fix max_hw_sectors calculation
  nvme: fix an error code in nvme_init_subsystem()
  nvme-pci: Save PCI state before putting drive into deepest state
  nvme-tcp: fix wrong stop condition in io_work
  ...
2019-10-04 09:56:51 -07:00
Pavel Begunkov
bf7ec93c64 io_uring: fix reversed nonblock flag for link submission
io_queue_link_head() accepts @force_nonblock flag, but io_ring_submit()
passes something opposite.

Fixes: c576666863 ("io_uring: optimize submit_and_wait API")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-10-04 08:31:15 -06:00
Eric Sandeen
cc3a7bfe62 vfs: Fix EOVERFLOW testing in put_compat_statfs64
Today, put_compat_statfs64() disallows nearly any field value over
2^32 if f_bsize is only 32 bits, but that makes no sense.
compat_statfs64 is there for the explicit purpose of providing 64-bit
fields for f_files, f_ffree, etc.  And f_bsize is always only 32 bits.

As a result, 32-bit userspace gets -EOVERFLOW for i.e.  large file
counts even with -D_FILE_OFFSET_BITS=64 set.

In reality, only f_bsize and f_frsize can legitimately overflow
(fields like f_type and f_namelen should never be large), so test
only those fields.

This bug was discussed at length some time ago, and this is the proposal
Al suggested at https://lkml.org/lkml/2018/8/6/640.  It seemed to get
dropped amid the discussion of other related changes, but this
part seems obviously correct on its own, so I've picked it up and
sent it, for expediency.

Fixes: 64d2ab32ef ("vfs: fix put_compat_statfs64() does not handle errors")
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-03 14:21:35 -07:00
Josef Bacik
c5f4987e86 btrfs: fix uninitialized ret in ref-verify
Coverity caught a case where we could return with a uninitialized value
in ret in process_leaf.  This is actually pretty likely because we could
very easily run into a block group item key and have a garbage value in
ret and think there was an errror.  Fix this by initializing ret to 0.

Reported-by: Colin Ian King <colin.king@canonical.com>
Fixes: fd708b81d9 ("Btrfs: add a extent ref verify tool")
CC: stable@vger.kernel.org # 4.19+
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-10-03 15:00:56 +02:00
ZhangXiaoxu
33ea5aaa87 nfs: Fix nfsi->nrequests count error on nfs_inode_remove_request
When xfstests testing, there are some WARNING as below:

WARNING: CPU: 0 PID: 6235 at fs/nfs/inode.c:122 nfs_clear_inode+0x9c/0xd8
Modules linked in:
CPU: 0 PID: 6235 Comm: umount.nfs
Hardware name: linux,dummy-virt (DT)
pstate: 60000005 (nZCv daif -PAN -UAO)
pc : nfs_clear_inode+0x9c/0xd8
lr : nfs_evict_inode+0x60/0x78
sp : fffffc000f68fc00
x29: fffffc000f68fc00 x28: fffffe00c53155c0
x27: fffffe00c5315000 x26: fffffc0009a63748
x25: fffffc000f68fd18 x24: fffffc000bfaaf40
x23: fffffc000936d3c0 x22: fffffe00c4ff5e20
x21: fffffc000bfaaf40 x20: fffffe00c4ff5d10
x19: fffffc000c056000 x18: 000000000000003c
x17: 0000000000000000 x16: 0000000000000000
x15: 0000000000000040 x14: 0000000000000228
x13: fffffc000c3a2000 x12: 0000000000000045
x11: 0000000000000000 x10: 0000000000000000
x9 : 0000000000000000 x8 : 0000000000000000
x7 : 0000000000000000 x6 : fffffc00084b027c
x5 : fffffc0009a64000 x4 : fffffe00c0e77400
x3 : fffffc000c0563a8 x2 : fffffffffffffffb
x1 : 000000000000764e x0 : 0000000000000001
Call trace:
 nfs_clear_inode+0x9c/0xd8
 nfs_evict_inode+0x60/0x78
 evict+0x108/0x380
 dispose_list+0x70/0xa0
 evict_inodes+0x194/0x210
 generic_shutdown_super+0xb0/0x220
 nfs_kill_super+0x40/0x88
 deactivate_locked_super+0xb4/0x120
 deactivate_super+0x144/0x160
 cleanup_mnt+0x98/0x148
 __cleanup_mnt+0x38/0x50
 task_work_run+0x114/0x160
 do_notify_resume+0x2f8/0x308
 work_pending+0x8/0x14

The nrequest should be increased/decreased only if PG_INODE_REF flag
was setted.

But in the nfs_inode_remove_request function, it maybe decrease when
no PG_INODE_REF flag, this maybe lead nrequests count error.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: ZhangXiaoxu <zhangxiaoxu5@huawei.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-10-02 08:52:17 -04:00
Josef Bacik
11a19a9087 btrfs: allocate new inode in NOFS context
A user reported a lockdep splat

 ======================================================
 WARNING: possible circular locking dependency detected
 5.2.11-gentoo #2 Not tainted
 ------------------------------------------------------
 kswapd0/711 is trying to acquire lock:
 000000007777a663 (sb_internal){.+.+}, at: start_transaction+0x3a8/0x500

but task is already holding lock:
 000000000ba86300 (fs_reclaim){+.+.}, at: __fs_reclaim_acquire+0x0/0x30

which lock already depends on the new lock.

the existing dependency chain (in reverse order) is:

-> #1 (fs_reclaim){+.+.}:
 kmem_cache_alloc+0x1f/0x1c0
 btrfs_alloc_inode+0x1f/0x260
 alloc_inode+0x16/0xa0
 new_inode+0xe/0xb0
 btrfs_new_inode+0x70/0x610
 btrfs_symlink+0xd0/0x420
 vfs_symlink+0x9c/0x100
 do_symlinkat+0x66/0xe0
 do_syscall_64+0x55/0x1c0
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

-> #0 (sb_internal){.+.+}:
 __sb_start_write+0xf6/0x150
 start_transaction+0x3a8/0x500
 btrfs_commit_inode_delayed_inode+0x59/0x110
 btrfs_evict_inode+0x19e/0x4c0
 evict+0xbc/0x1f0
 inode_lru_isolate+0x113/0x190
 __list_lru_walk_one.isra.4+0x5c/0x100
 list_lru_walk_one+0x32/0x50
 prune_icache_sb+0x36/0x80
 super_cache_scan+0x14a/0x1d0
 do_shrink_slab+0x131/0x320
 shrink_node+0xf7/0x380
 balance_pgdat+0x2d5/0x640
 kswapd+0x2ba/0x5e0
 kthread+0x147/0x160
 ret_from_fork+0x24/0x30

other info that might help us debug this:

 Possible unsafe locking scenario:

 CPU0 CPU1
 ---- ----
 lock(fs_reclaim);
 lock(sb_internal);
 lock(fs_reclaim);
 lock(sb_internal);
*** DEADLOCK ***

 3 locks held by kswapd0/711:
 #0: 000000000ba86300 (fs_reclaim){+.+.}, at: __fs_reclaim_acquire+0x0/0x30
 #1: 000000004a5100f8 (shrinker_rwsem){++++}, at: shrink_node+0x9a/0x380
 #2: 00000000f956fa46 (&type->s_umount_key#30){++++}, at: super_cache_scan+0x35/0x1d0

stack backtrace:
 CPU: 7 PID: 711 Comm: kswapd0 Not tainted 5.2.11-gentoo #2
 Hardware name: Dell Inc. Precision Tower 3620/0MWYPT, BIOS 2.4.2 09/29/2017
 Call Trace:
 dump_stack+0x85/0xc7
 print_circular_bug.cold.40+0x1d9/0x235
 __lock_acquire+0x18b1/0x1f00
 lock_acquire+0xa6/0x170
 ? start_transaction+0x3a8/0x500
 __sb_start_write+0xf6/0x150
 ? start_transaction+0x3a8/0x500
 start_transaction+0x3a8/0x500
 btrfs_commit_inode_delayed_inode+0x59/0x110
 btrfs_evict_inode+0x19e/0x4c0
 ? var_wake_function+0x20/0x20
 evict+0xbc/0x1f0
 inode_lru_isolate+0x113/0x190
 ? discard_new_inode+0xc0/0xc0
 __list_lru_walk_one.isra.4+0x5c/0x100
 ? discard_new_inode+0xc0/0xc0
 list_lru_walk_one+0x32/0x50
 prune_icache_sb+0x36/0x80
 super_cache_scan+0x14a/0x1d0
 do_shrink_slab+0x131/0x320
 shrink_node+0xf7/0x380
 balance_pgdat+0x2d5/0x640
 kswapd+0x2ba/0x5e0
 ? __wake_up_common_lock+0x90/0x90
 kthread+0x147/0x160
 ? balance_pgdat+0x640/0x640
 ? __kthread_create_on_node+0x160/0x160
 ret_from_fork+0x24/0x30

This is because btrfs_new_inode() calls new_inode() under the
transaction.  We could probably move the new_inode() outside of this but
for now just wrap it in memalloc_nofs_save().

Reported-by: Zdenek Sojka <zsojka@seznam.cz>
Fixes: 712e36c5f2 ("btrfs: use GFP_KERNEL in btrfs_alloc_inode")
CC: stable@vger.kernel.org # 4.16+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-10-01 20:12:27 +02:00
Zygo Blaxell
7a54789074 btrfs: fix balance convert to single on 32-bit host CPUs
Currently, the command:

	btrfs balance start -dconvert=single,soft .

on a Raspberry Pi produces the following kernel message:

	BTRFS error (device mmcblk0p2): balance: invalid convert data profile single

This fails because we use is_power_of_2(unsigned long) to validate
the new data profile, the constant for 'single' profile uses bit 48,
and there are only 32 bits in a long on ARM.

Fix by open-coding the check using u64 variables.

Tested by completing the original balance command on several Raspberry
Pis.

Fixes: 818255feec ("btrfs: use common helper instead of open coding a bit test")
CC: stable@vger.kernel.org # 4.20+
Signed-off-by: Zygo Blaxell <ce3g8jdj@umail.furryterror.org>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-10-01 19:37:29 +02:00
Josef Bacik
4203e96894 btrfs: fix incorrect updating of log root tree
We've historically had reports of being unable to mount file systems
because the tree log root couldn't be read.  Usually this is the "parent
transid failure", but could be any of the related errors, including
"fsid mismatch" or "bad tree block", depending on which block got
allocated.

The modification of the individual log root items are serialized on the
per-log root root_mutex.  This means that any modification to the
per-subvol log root_item is completely protected.

However we update the root item in the log root tree outside of the log
root tree log_mutex.  We do this in order to allow multiple subvolumes
to be updated in each log transaction.

This is problematic however because when we are writing the log root
tree out we update the super block with the _current_ log root node
information.  Since these two operations happen independently of each
other, you can end up updating the log root tree in between writing out
the dirty blocks and setting the super block to point at the current
root.

This means we'll point at the new root node that hasn't been written
out, instead of the one we should be pointing at.  Thus whatever garbage
or old block we end up pointing at complains when we mount the file
system later and try to replay the log.

Fix this by copying the log's root item into a local root item copy.
Then once we're safely under the log_root_tree->log_mutex we update the
root item in the log_root_tree.  This way we do not modify the
log_root_tree while we're committing it, fixing the problem.

CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Chris Mason <clm@fb.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-10-01 18:41:02 +02:00
Filipe Manana
c67d970f0e Btrfs: fix memory leak due to concurrent append writes with fiemap
When we have a buffered write that starts at an offset greater than or
equals to the file's size happening concurrently with a full ranged
fiemap, we can end up leaking an extent state structure.

Suppose we have a file with a size of 1Mb, and before the buffered write
and fiemap are performed, it has a single extent state in its io tree
representing the range from 0 to 1Mb, with the EXTENT_DELALLOC bit set.

The following sequence diagram shows how the memory leak happens if a
fiemap a buffered write, starting at offset 1Mb and with a length of
4Kb, are performed concurrently.

          CPU 1                                                  CPU 2

  extent_fiemap()
    --> it's a full ranged fiemap
        range from 0 to LLONG_MAX - 1
        (9223372036854775807)

    --> locks range in the inode's
        io tree
      --> after this we have 2 extent
          states in the io tree:
          --> 1 for range [0, 1Mb[ with
              the bits EXTENT_LOCKED and
              EXTENT_DELALLOC_BITS set
          --> 1 for the range
              [1Mb, LLONG_MAX[ with
              the EXTENT_LOCKED bit set

                                                  --> start buffered write at offset
                                                      1Mb with a length of 4Kb

                                                  btrfs_file_write_iter()

                                                    btrfs_buffered_write()
                                                      --> cached_state is NULL

                                                      lock_and_cleanup_extent_if_need()
                                                        --> returns 0 and does not lock
                                                            range because it starts
                                                            at current i_size / eof

                                                      --> cached_state remains NULL

                                                      btrfs_dirty_pages()
                                                        btrfs_set_extent_delalloc()
                                                          (...)
                                                          __set_extent_bit()

                                                            --> splits extent state for range
                                                                [1Mb, LLONG_MAX[ and now we
                                                                have 2 extent states:

                                                                --> one for the range
                                                                    [1Mb, 1Mb + 4Kb[ with
                                                                    EXTENT_LOCKED set
                                                                --> another one for the range
                                                                    [1Mb + 4Kb, LLONG_MAX[ with
                                                                    EXTENT_LOCKED set as well

                                                            --> sets EXTENT_DELALLOC on the
                                                                extent state for the range
                                                                [1Mb, 1Mb + 4Kb[
                                                            --> caches extent state
                                                                [1Mb, 1Mb + 4Kb[ into
                                                                @cached_state because it has
                                                                the bit EXTENT_LOCKED set

                                                    --> btrfs_buffered_write() ends up
                                                        with a non-NULL cached_state and
                                                        never calls anything to release its
                                                        reference on it, resulting in a
                                                        memory leak

Fix this by calling free_extent_state() on cached_state if the range was
not locked by lock_and_cleanup_extent_if_need().

The same issue can happen if anything else other than fiemap locks a range
that covers eof and beyond.

This could be triggered, sporadically, by test case generic/561 from the
fstests suite, which makes duperemove run concurrently with fsstress, and
duperemove does plenty of calls to fiemap. When CONFIG_BTRFS_DEBUG is set
the leak is reported in dmesg/syslog when removing the btrfs module with
a message like the following:

  [77100.039461] BTRFS: state leak: start 6574080 end 6582271 state 16402 in tree 0 refs 1

Otherwise (CONFIG_BTRFS_DEBUG not set) detectable with kmemleak.

CC: stable@vger.kernel.org # 4.16+
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-10-01 18:40:58 +02:00
Arnd Bergmann
bdf2007311 io_uring: use __kernel_timespec in timeout ABI
All system calls use struct __kernel_timespec instead of the old struct
timespec, but this one was just added with the old-style ABI. Change it
now to enforce the use of __kernel_timespec, avoiding ABI confusion and
the need for compat handlers on 32-bit architectures.

Any user space caller will have to use __kernel_timespec now, but this
is unambiguous and works for any C library regardless of the time_t
definition. A nicer way to specify the timeout would have been a less
ambiguous 64-bit nanosecond value, but I suppose it's too late now to
change that as this would impact both 32-bit and 64-bit users.

Fixes: 5262f56798 ("io_uring: IORING_OP_TIMEOUT support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-10-01 09:53:29 -06:00
Gao Xiang
dc76ea8c10 erofs: fix mis-inplace determination related with noio chain
Fix a recent cleanup patch. noio (bypass) chain is
handled asynchronously against submit chain, therefore
inplace I/O or pagevec cannot be applied to such pages.
Add detailed comment for this as well.

Fixes: 97e86a858b ("staging: erofs: tidy up decompression frontend")
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Link: https://lore.kernel.org/r/20190922100434.229340-1-gaoxiang25@huawei.com
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2019-10-01 04:54:45 +08:00
Gao Xiang
55252ab72b erofs: fix erofs_get_meta_page locking due to a cleanup
After doing more drop_caches stress test on
our products, I found the mistake introduced by
a very recent cleanup [1].

The current rule is that "erofs_get_meta_page"
should be returned with page locked (although
it's mostly unnecessary for read-only fs after
pages are PG_uptodate), but a fix should be
done for this.

[1] https://lore.kernel.org/r/20190904020912.63925-26-gaoxiang25@huawei.com
Fixes: 618f40ea02 ("erofs: use read_cache_page_gfp for erofs_get_meta_page")
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Link: https://lore.kernel.org/r/20190921184355.149928-1-gaoxiang25@huawei.com
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2019-10-01 04:54:33 +08:00
Wei Yongjun
517d6b9c6f erofs: fix return value check in erofs_read_superblock()
In case of error, the function read_mapping_page() returns
ERR_PTR() not NULL. The NULL test in the return value check
should be replaced with IS_ERR().

Fixes: fe7c242357 ("erofs: use read_mapping_page instead of sb_bread")
Reviewed-by: Gao Xiang <gaoxiang25@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Link: https://lore.kernel.org/r/20190918083033.47780-1-weiyongjun1@huawei.com
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2019-10-01 04:53:50 +08:00
Linus Torvalds
bb48a59135 for-5.4-rc1-tag
-----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEE8rQSAMVO+zA4DBdWxWXV+ddtWDsFAl2SDbMACgkQxWXV+ddt
 WDsUhw/9HcRsT6SlrwA2R5leHxCR5UMwT2Zmbxpfft37ANF0SC1UINHBfnmquM97
 xX6fdRSR9RUjF9DrdLPfLBnJDQ/MnHl1ruIVBFhJm6cJ9TJwf9E0TiJBQt+08JWg
 vy5hZBWvsPWWRBJ94XPMe4LtakK/isW4Cz5W9AdrC2Siqw69j6eZzms2AnIjyBjA
 BoKg4se2Ay2rMxLZWXIOj9374PU+N1cnRnqgh77ZxLku5WdCzrDfB5safE7UmoTG
 /MWJuuIgzOk0iQpQORRtEZDS1dNe5KT9m4xXkUbrZbQROwqnXrT1SVIsuqNAvlPk
 uaymR1W8nshepzpMlSxVydLv/mKWZNUGnDxOJ23ooow8Yd7ndppXEtFuGwCYqIFc
 xQqxuTLREvJ9+jpSv11bmDpk/ULRqpV+2PjUqGaWlGwFArJ+qFRLVGYx31eXmDPj
 t2mrPOcXGzY0pKtIpbkuUGleY/jeI+BNsvD4+QPs+jnp0nmfvH0/Rmp7grGqx2FI
 rQM8Gn4a5i3nuEDWLp8nN2wcKC3ePwy96Vp2tqfsl6TVTPx4EFzGLkWogHR2yiqI
 0LAj8YWFmWuChSv71wYOjX79CppjcbNwOakSwtDjV30jkwoh2f/0D3OwOpua2xe8
 75KQMaSB0kesGZz7ZkL1kMqA5m5w7MGZom6XZoBJ+bq2HPLB2jo=
 =2UM7
 -----END PGP SIGNATURE-----

Merge tag 'for-5.4-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs fixes from David Sterba:
 "A bunch of fixes that accumulated in recent weeks, mostly material for
  stable.

  Summary:

   - fix for regression from 5.3 that prevents to use balance convert
     with single profile

   - qgroup fixes: rescan race, accounting leak with multiple writers,
     potential leak after io failure recovery

   - fix for use after free in relocation (reported by KASAN)

   - other error handling fixups"

* tag 'for-5.4-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: qgroup: Fix reserved data space leak if we have multiple reserve calls
  btrfs: qgroup: Fix the wrong target io_tree when freeing reserved data space
  btrfs: Fix a regression which we can't convert to SINGLE profile
  btrfs: relocation: fix use-after-free on dead relocation roots
  Btrfs: fix race setting up and completing qgroup rescan workers
  Btrfs: fix missing error return if writeback for extent buffer never started
  btrfs: adjust dirty_metadata_bytes after writeback failure of extent buffer
  Btrfs: fix selftests failure due to uninitialized i_mode in test inodes
2019-09-30 10:25:24 -07:00
Linus Torvalds
1eb80d6ffb Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull more vfs updates from Al Viro:
 "A couple of misc patches"

* 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  afs dynroot: switch to simple_dir_operations
  fs/handle.c - fix up kerneldoc
2019-09-29 19:42:07 -07:00
Linus Torvalds
7edee5229c 9 smb3 patches including an important patch for debugging traces with wireshark, and 3 patches for stable
-----BEGIN PGP SIGNATURE-----
 
 iQGzBAABCgAdFiEE6fsu8pdIjtWE/DpLiiy9cAdyT1EFAl2Pzl0ACgkQiiy9cAdy
 T1F7aAv9EUA2vEdV+3tyKX17yGm8GBVygANsdMlGqqmRhauO0+KJnrsTR19qh9na
 oe0r6EwaS6/JwDtM/Tt0YyjyRS7GDyfT4cNNFVmrJ0fnQV11FJR0X83uzdm3HydH
 eOyKNG22TwOeFJ3kWqdvSI0AtfbmIcVoOlUAAKsAsv2ksrJIW7Q1BIgQeD8estUV
 j8VjPEIc1c/69UU/H5ktrRHMeT5PO61SV8xGM47WnYkntlFDe1E83xWGoxo996Pc
 KdGSrB1edWXK6kSlX3yQWnoo8QxcUm8IjgsudqcnOrhnro9s/cDU5ZU1RlXNQeB8
 LMtYwNA7jEu9p3TIibxOCph4gofUWNV25GbEJWOY03NxWReTvgLsMbsreul+XNv9
 fow5mvCG94SaE8xDjTvzYRBTeYoXv0WjlTTJjqAlVshirQXk7a2dEBVBipkn0Ea7
 0845c3NtR20pDGQs3vVzdStDT2MwkNUl1hN4vE1Zl0p2ClOS+eFVq9MgIEddSLi2
 Z0oJsmfg
 =o1/m
 -----END PGP SIGNATURE-----

Merge tag '5.4-rc-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull more cifs updates from Steve French:
 "Fixes from the recent SMB3 Test events and Storage Developer
  Conference (held the last two weeks).

  Here are nine smb3 patches including an important patch for debugging
  traces with wireshark, with three patches marked for stable.

  Additional fixes from last week to better handle some newly discovered
  reparse points, and a fix the create/mkdir path for setting the mode
  more atomically (in SMB3 Create security descriptor context), and one
  for path name processing are still being tested so are not included
  here"

* tag '5.4-rc-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  CIFS: Fix oplock handling for SMB 2.1+ protocols
  smb3: missing ACL related flags
  smb3: pass mode bits into create calls
  smb3: Add missing reparse tags
  CIFS: fix max ea value size
  fs/cifs/sess.c: Remove set but not used variable 'capabilities'
  fs/cifs/smb2pdu.c: Make SMB2_notify_init static
  smb3: fix leak in "open on server" perf counter
  smb3: allow decryption keys to be dumped by admin for debugging
2019-09-29 19:37:32 -07:00
Linus Torvalds
3f2dc2798b Merge branch 'entropy'
Merge active entropy generation updates.

This is admittedly partly "for discussion".  We need to have a way
forward for the boot time deadlocks where user space ends up waiting for
more entropy, but no entropy is forthcoming because the system is
entirely idle just waiting for something to happen.

While this was triggered by what is arguably a user space bug with
GDM/gnome-session asking for secure randomness during early boot, when
they didn't even need any such truly secure thing, the issue ends up
being that our "getrandom()" interface is prone to that kind of
confusion, because people don't think very hard about whether they want
to block for sufficient amounts of entropy.

The approach here-in is to decide to not just passively wait for entropy
to happen, but to start actively collecting it if it is missing.  This
is not necessarily always possible, but if the architecture has a CPU
cycle counter, there is a fair amount of noise in the exact timings of
reasonably complex loads.

We may end up tweaking the load and the entropy estimates, but this
should be at least a reasonable starting point.

As part of this, we also revert the revert of the ext4 IO pattern
improvement that ended up triggering the reported lack of external
entropy.

* getrandom() active entropy waiting:
  Revert "Revert "ext4: make __ext4_get_inode_loc plug""
  random: try to actively add entropy rather than passively wait for it
2019-09-29 19:25:39 -07:00
Linus Torvalds
02f03c4206 Revert "Revert "ext4: make __ext4_get_inode_loc plug""
This reverts commit 72dbcf7215.

Instead of waiting forever for entropy that may just not happen, we now
try to actively generate entropy when required, and are thus hopefully
avoiding the problem that caused the nice ext4 IO pattern fix to be
reverted.

So revert the revert.

Cc: Ahmed S. Darwish <darwish.07@gmail.com>
Cc: Ted Ts'o <tytso@mit.edu>
Cc: Willy Tarreau <w@1wt.eu>
Cc: Alexander E. Patrakov <patrakov@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-29 17:59:23 -07:00
Linus Torvalds
9c5efe9ae7 Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Ingo Molnar:

 - Apply a number of membarrier related fixes and cleanups, which fixes
   a use-after-free race in the membarrier code

 - Introduce proper RCU protection for tasks on the runqueue - to get
   rid of the subtle task_rcu_dereference() interface that was easy to
   get wrong

 - Misc fixes, but also an EAS speedup

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/fair: Avoid redundant EAS calculation
  sched/core: Remove double update_max_interval() call on CPU startup
  sched/core: Fix preempt_schedule() interrupt return comment
  sched/fair: Fix -Wunused-but-set-variable warnings
  sched/core: Fix migration to invalid CPU in __set_cpus_allowed_ptr()
  sched/membarrier: Return -ENOMEM to userspace on memory allocation failure
  sched/membarrier: Skip IPIs when mm->mm_users == 1
  selftests, sched/membarrier: Add multi-threaded test
  sched/membarrier: Fix p->mm->membarrier_state racy load
  sched/membarrier: Call sync_core only before usermode for same mm
  sched/membarrier: Remove redundant check
  sched/membarrier: Fix private expedited registration check
  tasks, sched/core: RCUify the assignment of rq->curr
  tasks, sched/core: With a grace period after finish_task_switch(), remove unnecessary code
  tasks, sched/core: Ensure tasks are available for a grace period after leaving the runqueue
  tasks: Add a count of task RCU users
  sched/core: Convert vcpu_is_preempted() from macro to an inline function
  sched/fair: Remove unused cfs_rq_clock_task() function
2019-09-28 12:39:07 -07:00
Linus Torvalds
aefcf2f4b5 Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull kernel lockdown mode from James Morris:
 "This is the latest iteration of the kernel lockdown patchset, from
  Matthew Garrett, David Howells and others.

  From the original description:

    This patchset introduces an optional kernel lockdown feature,
    intended to strengthen the boundary between UID 0 and the kernel.
    When enabled, various pieces of kernel functionality are restricted.
    Applications that rely on low-level access to either hardware or the
    kernel may cease working as a result - therefore this should not be
    enabled without appropriate evaluation beforehand.

    The majority of mainstream distributions have been carrying variants
    of this patchset for many years now, so there's value in providing a
    doesn't meet every distribution requirement, but gets us much closer
    to not requiring external patches.

  There are two major changes since this was last proposed for mainline:

   - Separating lockdown from EFI secure boot. Background discussion is
     covered here: https://lwn.net/Articles/751061/

   -  Implementation as an LSM, with a default stackable lockdown LSM
      module. This allows the lockdown feature to be policy-driven,
      rather than encoding an implicit policy within the mechanism.

  The new locked_down LSM hook is provided to allow LSMs to make a
  policy decision around whether kernel functionality that would allow
  tampering with or examining the runtime state of the kernel should be
  permitted.

  The included lockdown LSM provides an implementation with a simple
  policy intended for general purpose use. This policy provides a coarse
  level of granularity, controllable via the kernel command line:

    lockdown={integrity|confidentiality}

  Enable the kernel lockdown feature. If set to integrity, kernel features
  that allow userland to modify the running kernel are disabled. If set to
  confidentiality, kernel features that allow userland to extract
  confidential information from the kernel are also disabled.

  This may also be controlled via /sys/kernel/security/lockdown and
  overriden by kernel configuration.

  New or existing LSMs may implement finer-grained controls of the
  lockdown features. Refer to the lockdown_reason documentation in
  include/linux/security.h for details.

  The lockdown feature has had signficant design feedback and review
  across many subsystems. This code has been in linux-next for some
  weeks, with a few fixes applied along the way.

  Stephen Rothwell noted that commit 9d1f8be5cf ("bpf: Restrict bpf
  when kernel lockdown is in confidentiality mode") is missing a
  Signed-off-by from its author. Matthew responded that he is providing
  this under category (c) of the DCO"

* 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (31 commits)
  kexec: Fix file verification on S390
  security: constify some arrays in lockdown LSM
  lockdown: Print current->comm in restriction messages
  efi: Restrict efivar_ssdt_load when the kernel is locked down
  tracefs: Restrict tracefs when the kernel is locked down
  debugfs: Restrict debugfs when the kernel is locked down
  kexec: Allow kexec_file() with appropriate IMA policy when locked down
  lockdown: Lock down perf when in confidentiality mode
  bpf: Restrict bpf when kernel lockdown is in confidentiality mode
  lockdown: Lock down tracing and perf kprobes when in confidentiality mode
  lockdown: Lock down /proc/kcore
  x86/mmiotrace: Lock down the testmmiotrace module
  lockdown: Lock down module params that specify hardware parameters (eg. ioport)
  lockdown: Lock down TIOCSSERIAL
  lockdown: Prohibit PCMCIA CIS storage when the kernel is locked down
  acpi: Disable ACPI table override if the kernel is locked down
  acpi: Ignore acpi_rsdp kernel param when the kernel has been locked down
  ACPI: Limit access to custom_method when the kernel is locked down
  x86/msr: Restrict MSR access when the kernel is locked down
  x86: Lock down IO port access when the kernel is locked down
  ...
2019-09-28 08:14:15 -07:00
Linus Torvalds
298fb76a55 Highlights:
- add a new knfsd file cache, so that we don't have to open and
 	  close on each (NFSv2/v3) READ or WRITE.  This can speed up
 	  read and write in some cases.  It also replaces our readahead
 	  cache.
 	- Prevent silent data loss on write errors, by treating write
 	  errors like server reboots for the purposes of write caching,
 	  thus forcing clients to resend their writes.
 	- Tweak the code that allocates sessions to be more forgiving,
 	  so that NFSv4.1 mounts are less likely to hang when a server
 	  already has a lot of clients.
 	- Eliminate an arbitrary limit on NFSv4 ACL sizes; they should
 	  now be limited only by the backend filesystem and the
 	  maximum RPC size.
 	- Allow the server to enforce use of the correct kerberos
 	  credentials when a client reclaims state after a reboot.
 
 And some miscellaneous smaller bugfixes and cleanup.
 -----BEGIN PGP SIGNATURE-----
 
 iQJJBAABCAAzFiEEYtFWavXG9hZotryuJ5vNeUKO4b4FAl2OoFcVHGJmaWVsZHNA
 ZmllbGRzZXMub3JnAAoJECebzXlCjuG+dRoP/3OW1NxPjpjbCQWZL0M+O3AYJJla
 W8E+uoZKMosFEe/ymokMD0Vn5s47jPaMCifMjHZa2GygW8zHN9X2v0HURx/lob+o
 /rJXwMn78N/8kdbfDz2FvaCPeT0IuNzRIFBV8/sSXofqwCBwvPo+cl0QGrd4/xLp
 X35qlupx62TRk+kbdRjvv8kpS5SJ7BvR+FSA1WubNYWw2hpdEsr2OCFdGq2Wvthy
 DK6AfGBXfJGsOE+HGCSj6ejRV6i0UOJ17P8gRSsx+YT0DOe5E7ROjt+qvvRwk489
 wmR8Vjuqr1e40eGAUq3xuLfk5F5NgycY4ekVxk/cTVFNwWcz2DfdjXQUlyPAbrSD
 SqIyxN1qdKT24gtr7AHOXUWJzBYPWDgObCVBXUGzyL81RiDdhf38HRNjL2TcSDld
 tzCjQ0wbPw+iT74v6qQRY05oS+h3JOtDjU4pxsBnxVtNn4WhGJtaLfWW8o1C1QwU
 bc4aX3TlYhDmzU7n7Zjt4rFXGJfyokM+o6tPao1Z60Pmsv1gOk4KQlzLtW/jPHx4
 ZwYTwVQUKRDBfC62nmgqDyGI3/Qu11FuIxL2KXUCgkwDxNWN4YkwYjOGw9Lb5qKM
 wFpxq6CDNZB/IWLEu8Yg85kDPPUJMoI657lZb7Osr/MfBpU0YljcMOIzLBy8uV1u
 9COUbPaQipiWGu/0
 =diBo
 -----END PGP SIGNATURE-----

Merge tag 'nfsd-5.4' of git://linux-nfs.org/~bfields/linux

Pull nfsd updates from Bruce Fields:
 "Highlights:

   - Add a new knfsd file cache, so that we don't have to open and close
     on each (NFSv2/v3) READ or WRITE. This can speed up read and write
     in some cases. It also replaces our readahead cache.

   - Prevent silent data loss on write errors, by treating write errors
     like server reboots for the purposes of write caching, thus forcing
     clients to resend their writes.

   - Tweak the code that allocates sessions to be more forgiving, so
     that NFSv4.1 mounts are less likely to hang when a server already
     has a lot of clients.

   - Eliminate an arbitrary limit on NFSv4 ACL sizes; they should now be
     limited only by the backend filesystem and the maximum RPC size.

   - Allow the server to enforce use of the correct kerberos credentials
     when a client reclaims state after a reboot.

  And some miscellaneous smaller bugfixes and cleanup"

* tag 'nfsd-5.4' of git://linux-nfs.org/~bfields/linux: (34 commits)
  sunrpc: clean up indentation issue
  nfsd: fix nfs read eof detection
  nfsd: Make nfsd_reset_boot_verifier_locked static
  nfsd: degraded slot-count more gracefully as allocation nears exhaustion.
  nfsd: handle drc over-allocation gracefully.
  nfsd: add support for upcall version 2
  nfsd: add a "GetVersion" upcall for nfsdcld
  nfsd: Reset the boot verifier on all write I/O errors
  nfsd: Don't garbage collect files that might contain write errors
  nfsd: Support the server resetting the boot verifier
  nfsd: nfsd_file cache entries should be per net namespace
  nfsd: eliminate an unnecessary acl size limit
  Deprecate nfsd fault injection
  nfsd: remove duplicated include from filecache.c
  nfsd: Fix the documentation for svcxdr_tmpalloc()
  nfsd: Fix up some unused variable warnings
  nfsd: close cached files prior to a REMOVE or RENAME that would replace target
  nfsd: rip out the raparms cache
  nfsd: have nfsd_test_lock use the nfsd_file cache
  nfsd: hook up nfs4_preprocess_stateid_op to the nfsd_file cache
  ...
2019-09-27 17:00:27 -07:00
Linus Torvalds
8f744bdee4 add virtio-fs
-----BEGIN PGP SIGNATURE-----
 
 iHUEABYIAB0WIQSQHSd0lITzzeNWNm3h3BK/laaZPAUCXYx2zAAKCRDh3BK/laaZ
 PFpHAQD2G+F8a9e41jFTJg5YpNKMD8/Pl4T6v9chIO9qPXF2IAEAji0P1JterRfv
 ixiBhv54hSwYbk527nxNWE9tP5gAHAQ=
 =WCHy
 -----END PGP SIGNATURE-----

Merge tag 'virtio-fs-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse

Pull fuse virtio-fs support from Miklos Szeredi:
 "Virtio-fs allows exporting directory trees on the host and mounting
  them in guest(s).

  This isn't actually a new filesystem, but a glue layer between the
  fuse filesystem and a virtio based back-end.

  It's similar in functionality to the existing virtio-9p solution, but
  significantly faster in benchmarks and has better POSIX compliance.
  Further permformance improvements can be achieved by sharing the page
  cache between host and guest, allowing for faster I/O and reduced
  memory use.

  Kata Containers have been including the out-of-tree virtio-fs (with
  the shared page cache patches as well) since version 1.7 as an
  experimental feature. They have been active in development and plan to
  switch from virtio-9p to virtio-fs as their default solution. There
  has been interest from other sources as well.

  The userspace infrastructure is slated to be merged into qemu once the
  kernel part hits mainline.

  This was developed by Vivek Goyal, Dave Gilbert and Stefan Hajnoczi"

* tag 'virtio-fs-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  virtio-fs: add virtiofs filesystem
  virtio-fs: add Documentation/filesystems/virtiofs.rst
  fuse: reserve values for mapping protocol
2019-09-27 15:54:24 -07:00
Linus Torvalds
9977b1a714 9p pull request for inclusion in 5.4
Small fixes all around:
  - avoid overlayfs copy-up for PRIVATE mmaps
  - KUMSAN uninitialized warning for transport error
  - one syzbot memory leak fix in 9p cache
  - internal API cleanup for v9fs_fill_super
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEE/IPbcYBuWt0zoYhOq06b7GqY5nAFAl2OG0MACgkQq06b7GqY
 5nB21Q/+P4kD+wBg4d1b74Mf+oK2p2cSvCnYHcwMgkRsuyFgu7JXLSuRy2DLlAa4
 F+92x0jvit+yUy8bFqlEsSGGmE/dZC3WfpBOVChZRT/9ZLcxNasowtGDaySrX1e1
 tmx5QfYsNL840Cv8Vfos4QJjze1oE6RmSCUUO4KyC250PO/jxEgWGVPv1S8LfTUb
 KyhkcKlJ+TCqEON9nZ+CrQ4rndHNc7LxtBjVR0M03UYW55kYAhMLSj/AWqKA5I0q
 tARlTSgHHRdj4EJvWvLw7INg7BuvTuuyIzCIo/RfpUvijTDyLXFQI3qgtXosKLSq
 wuOacq8ykDRv8nvpLJ98daCw0pQOF2Qw40niFfl8Y7AxnaXggMI+UsVX/BnigVWX
 E6kaJm6d/YERee/f7aBsJkjKbwRqO7tMbNDrbK2/AzAaZo92dnB5nsEJnvKtCdjl
 aylBujCJq/DPp/SOf0Rl8mr24GdYVIk04hvqpxr4X6a/sacO3EUMh8GkGD7muY63
 axbYildLQHyChEn0TNdicFFrVie3A984eiK8sht+visd7c5QRm9iu1lsYtXdVGuz
 0OvSRtJuTDCTs6s1DhhVnez9luzH4VZJAj0RYJjcF1M4tzy0sKWUSSUf3RUbyxmY
 bocklihTlI5UzZfCP/wChXJ26+QrmcL7j0PrKA0NJy7ooFyT5eI=
 =VBrx
 -----END PGP SIGNATURE-----

Merge tag '9p-for-5.4' of git://github.com/martinetd/linux

Pull 9p updates from Dominique Martinet:
 "Some of the usual small fixes and cleanup.

  Small fixes all around:
   - avoid overlayfs copy-up for PRIVATE mmaps
   - KUMSAN uninitialized warning for transport error
   - one syzbot memory leak fix in 9p cache
   - internal API cleanup for v9fs_fill_super"

* tag '9p-for-5.4' of git://github.com/martinetd/linux:
  9p/vfs_super.c: Remove unused parameter data in v9fs_fill_super
  9p/cache.c: Fix memory leak in v9fs_cache_session_get_cookie
  9p: Transport error uninitialized
  9p: avoid attaching writeback_fid on mmap with type PRIVATE
2019-09-27 15:10:34 -07:00