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f240762f88
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Eric Dumazet f240762f88 io_uring: add a schedule point in io_add_buffers() 
Looping ~65535 times doing kmalloc() calls can trigger soft lockups,
especially with DEBUG features (like KASAN).

[  253.536212] watchdog: BUG: soft lockup - CPU#64 stuck for 26s! [b219417889:12575]
[  253.544433] Modules linked in: vfat fat i2c_mux_pca954x i2c_mux spidev cdc_acm xhci_pci xhci_hcd sha3_generic gq(O)
[  253.544451] CPU: 64 PID: 12575 Comm: b219417889 Tainted: G S         O      5.17.0-smp-DEV #801
[  253.544457] RIP: 0010:kernel_text_address (./include/asm-generic/sections.h:192 ./include/linux/kallsyms.h:29 kernel/extable.c:67 kernel/extable.c:98)
[  253.544464] Code: 0f 93 c0 48 c7 c1 e0 63 d7 a4 48 39 cb 0f 92 c1 20 c1 0f b6 c1 5b 5d c3 90 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 53 48 89 fb <48> c7 c0 00 00 80 a0 41 be 01 00 00 00 48 39 c7 72 0c 48 c7 c0 40
[  253.544468] RSP: 0018:ffff8882d8baf4c0 EFLAGS: 00000246
[  253.544471] RAX: 1ffff1105b175e00 RBX: ffffffffa13ef09a RCX: 00000000a13ef001
[  253.544474] RDX: ffffffffa13ef09a RSI: ffff8882d8baf558 RDI: ffffffffa13ef09a
[  253.544476] RBP: ffff8882d8baf4d8 R08: ffff8882d8baf5e0 R09: 0000000000000004
[  253.544479] R10: ffff8882d8baf5e8 R11: ffffffffa0d59a50 R12: ffff8882eab20380
[  253.544481] R13: ffffffffa0d59a50 R14: dffffc0000000000 R15: 1ffff1105b175eb0
[  253.544483] FS:  00000000016d3380(0000) GS:ffff88af48c00000(0000) knlGS:0000000000000000
[  253.544486] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  253.544488] CR2: 00000000004af0f0 CR3: 00000002eabfa004 CR4: 00000000003706e0
[  253.544491] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  253.544492] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  253.544494] Call Trace:
[  253.544496]  <TASK>
[  253.544498] ? io_queue_sqe (fs/io_uring.c:7143)
[  253.544505] __kernel_text_address (kernel/extable.c:78)
[  253.544508] unwind_get_return_address (arch/x86/kernel/unwind_frame.c:19)
[  253.544514] arch_stack_walk (arch/x86/kernel/stacktrace.c:27)
[  253.544517] ? io_queue_sqe (fs/io_uring.c:7143)
[  253.544521] stack_trace_save (kernel/stacktrace.c:123)
[  253.544527] ____kasan_kmalloc (mm/kasan/common.c:39 mm/kasan/common.c:45 mm/kasan/common.c:436 mm/kasan/common.c:515)
[  253.544531] ? ____kasan_kmalloc (mm/kasan/common.c:39 mm/kasan/common.c:45 mm/kasan/common.c:436 mm/kasan/common.c:515)
[  253.544533] ? __kasan_kmalloc (mm/kasan/common.c:524)
[  253.544535] ? kmem_cache_alloc_trace (./include/linux/kasan.h:270 mm/slab.c:3567)
[  253.544541] ? io_issue_sqe (fs/io_uring.c:4556 fs/io_uring.c:4589 fs/io_uring.c:6828)
[  253.544544] ? __io_queue_sqe (fs/io_uring.c:?)
[  253.544551] __kasan_kmalloc (mm/kasan/common.c:524)
[  253.544553] kmem_cache_alloc_trace (./include/linux/kasan.h:270 mm/slab.c:3567)
[  253.544556] ? io_issue_sqe (fs/io_uring.c:4556 fs/io_uring.c:4589 fs/io_uring.c:6828)
[  253.544560] io_issue_sqe (fs/io_uring.c:4556 fs/io_uring.c:4589 fs/io_uring.c:6828)
[  253.544564] ? __kasan_slab_alloc (mm/kasan/common.c:45 mm/kasan/common.c:436 mm/kasan/common.c:469)
[  253.544567] ? __kasan_slab_alloc (mm/kasan/common.c:39 mm/kasan/common.c:45 mm/kasan/common.c:436 mm/kasan/common.c:469)
[  253.544569] ? kmem_cache_alloc_bulk (mm/slab.h:732 mm/slab.c:3546)
[  253.544573] ? __io_alloc_req_refill (fs/io_uring.c:2078)
[  253.544578] ? io_submit_sqes (fs/io_uring.c:7441)
[  253.544581] ? __se_sys_io_uring_enter (fs/io_uring.c:10154 fs/io_uring.c:10096)
[  253.544584] ? __x64_sys_io_uring_enter (fs/io_uring.c:10096)
[  253.544587] ? do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)
[  253.544590] ? entry_SYSCALL_64_after_hwframe (??:?)
[  253.544596] __io_queue_sqe (fs/io_uring.c:?)
[  253.544600] io_queue_sqe (fs/io_uring.c:7143)
[  253.544603] io_submit_sqe (fs/io_uring.c:?)
[  253.544608] io_submit_sqes (fs/io_uring.c:?)
[  253.544612] __se_sys_io_uring_enter (fs/io_uring.c:10154 fs/io_uring.c:10096)
[  253.544616] __x64_sys_io_uring_enter (fs/io_uring.c:10096)
[  253.544619] do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)
[  253.544623] entry_SYSCALL_64_after_hwframe (??:?)

Fixes: ddf0322db7 ("io_uring: add IORING_OP_PROVIDE_BUFFERS")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Pavel Begunkov <asml.silence@gmail.com>
Cc: io-uring <io-uring@vger.kernel.org>
Reported-by: syzbot <syzkaller@googlegroups.com>
Link: https://lore.kernel.org/r/20220215041003.2394784-1-eric.dumazet@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-02-15 07:47:16 -07:00
..
9p 9p-for-5.17-rc1: fixes, split 9p_net_fd, new reviewer 2022-01-16 07:36:49 +02:00
adfs fs/adfs: remove unneeded variable make code cleaner 2022-01-20 08:52:55 +02:00
affs affs: use bdev_nr_sectors instead of open coding it 2021-10-18 14:43:22 -06:00
afs proc: remove PDE_DATA() completely 2022-01-22 08:33:37 +02:00
autofs autofs: fix wait name hash calculation in autofs_wait() 2021-10-20 21:09:02 -04:00
befs isystem: ship and use stdarg.h 2021-08-19 09:02:55 +09:00
bfs mm: require ->set_page_dirty to be explicitly wired up 2021-06-29 10:53:48 -07:00
btrfs mm: remove cleancache 2022-01-22 08:33:38 +02:00
cachefiles cachefiles: Check that the backing filesystem supports tmpfiles 2022-01-21 21:36:28 +00:00
ceph fscache fixes 2022-01-22 10:59:32 +02:00
cifs cifs: update internal module number 2022-01-19 23:14:34 -06:00
coda coda: bump module version to 7.2 2021-11-09 10:02:51 -08:00
configfs configfs: fix a race in configfs_lookup() 2021-08-25 07:58:49 +02:00
cramfs cramfs: use bdev_nr_bytes instead of open coding it 2021-10-18 14:43:22 -06:00
crypto fscrypt: improve a few comments 2021-10-25 19:11:50 -07:00
debugfs debugfs: lockdown: Allow reading debugfs files that are not world readable 2022-01-06 15:47:41 +01:00
devpts
dlm driver core changes for 5.17-rc1 2022-01-12 11:11:34 -08:00
ecryptfs fs: add is_idmapped_mnt() helper 2021-12-03 18:44:06 +01:00
efivarfs
efs
erofs dax + libnvdimm for v5.17 2022-01-12 15:46:11 -08:00
exfat exfat: fix missing REQ_SYNC in exfat_update_bhs() 2022-01-10 11:00:04 +09:00
exportfs
ext2 fsdax: shift partition offset handling into the file systems 2021-12-04 08:58:54 -08:00
ext4 mm: remove cleancache 2022-01-22 08:33:38 +02:00
f2fs bitmap patches for 5.17-rc1 2022-01-23 06:20:44 +02:00
fat FAT: use io_schedule_timeout() instead of congestion_wait() 2022-01-20 08:52:54 +02:00
freevxfs
fscache fscache: Fix the volume collision wait condition 2022-01-21 21:36:28 +00:00
fuse virtio,vdpa,qemu_fw_cfg: features, cleanups, fixes 2022-01-18 10:05:48 +02:00
gfs2 driver core changes for 5.17-rc1 2022-01-12 11:11:34 -08:00
hfs Merge branch 'akpm' (patches from Andrew) 2021-11-09 10:11:53 -08:00
hfsplus hfsplus: use struct_group_attr() for memcpy() region 2022-01-20 08:52:54 +02:00
hostfs hostfs: Fix writeback of dirty pages 2021-12-21 21:44:27 +01:00
hpfs treewide: Replace open-coded flex arrays in unions 2021-10-18 12:28:53 -07:00
hugetlbfs hugetlbfs: fix off-by-one error in hugetlb_vmdelete_list() 2022-01-15 16:30:30 +02:00
iomap dax + libnvdimm for v5.17 2022-01-12 15:46:11 -08:00
isofs isofs: Fix out of bound access for corrupted isofs image 2021-10-19 12:51:02 +02:00
jbd2 proc: remove PDE_DATA() completely 2022-01-22 08:33:37 +02:00
jffs2 Merge branch 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2022-01-17 05:49:30 +02:00
jfs Just one JFS patch 2021-11-03 09:23:25 -07:00
kernfs kernfs: prevent early freeing of root node 2021-12-03 14:36:21 +01:00
ksmbd 23 ksmbd server fixes 2022-01-20 13:39:13 +02:00
lockd Merge branch 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2022-01-17 05:49:30 +02:00
minix mm: require ->set_page_dirty to be explicitly wired up 2021-06-29 10:53:48 -07:00
netfs netfs: Make ops->init_rreq() optional 2022-01-21 21:36:28 +00:00
nfs Merge branch 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2022-01-17 05:49:30 +02:00
nfs_common nfs: Fix kerneldoc warning shown up by W=1 2021-10-04 22:02:17 +01:00
nfsd Merge branch 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2022-01-17 05:49:30 +02:00
nilfs2 Merge branch 'akpm' (patches from Andrew) 2022-01-20 10:41:01 +02:00
nls
notify inotify: simplify subdirectory registration with register_sysctl() 2022-01-22 08:33:35 +02:00
ntfs fs/ntfs/attrib.c: fix one kernel-doc comment 2022-01-15 16:30:24 +02:00
ntfs3 mm: remove cleancache 2022-01-22 08:33:38 +02:00
ocfs2 bitmap patches for 5.17-rc1 2022-01-23 06:20:44 +02:00
omfs mm: require ->set_page_dirty to be explicitly wired up 2021-06-29 10:53:48 -07:00
openpromfs
orangefs orangefs: Fix the size of a memory allocation in orangefs_bufmap_alloc() 2021-12-31 14:37:43 -05:00
overlayfs fs: add is_idmapped_mnt() helper 2021-12-03 18:44:06 +01:00
proc proc: remove PDE_DATA() completely 2022-01-22 08:33:37 +02:00
pstore pstore update for v5.17-rc1 2022-01-10 11:48:37 -08:00
qnx4 qnx4: work around gcc false positive warning bug 2021-09-21 08:36:48 -07:00
qnx6
quota \n 2021-11-06 16:40:48 -07:00
ramfs Merge branch 'akpm' (patches from Andrew) 2021-11-09 10:11:53 -08:00
reiserfs reiserfs: don't use congestion_wait() 2021-11-18 11:52:22 +01:00
romfs
smbfs_common smb3: add new defines from protocol specification 2022-01-18 16:50:47 -06:00
squashfs squashfs: provide backing_dev_info in order to disable read-ahead 2022-01-15 16:30:24 +02:00
sysfs fs/sysfs/dir.c: replace S_IRWXU|S_IRUGO|S_IXUGO with 0755 sysfs_create_dir_ns() 2021-10-05 16:35:05 +02:00
sysv sysv: use BUILD_BUG_ON instead of runtime check 2021-11-09 10:02:52 -08:00
tracefs Tracing updates for 5.17: 2022-01-16 10:15:32 +02:00
ubifs ubifs: read-only if LEB may always be taken in ubifs_garbage_collect 2021-12-23 22:30:38 +01:00
udf udf: Fix error handling in udf_new_inode() 2021-12-15 13:08:34 +01:00
ufs isystem: ship and use stdarg.h 2021-08-19 09:02:55 +09:00
unicode unicode: fix .gitignore for generated utfdata file 2022-01-17 07:26:43 +02:00
vboxsf vboxfs: fix broken legacy mount signature checking 2021-09-27 11:26:21 -07:00
verity fs-verity: fix signed integer overflow with i_size near S64_MAX 2021-09-22 10:56:34 -07:00
xfs New code for 5.17: 2022-01-22 11:04:27 +02:00
zonefs zonefs: add MODULE_ALIAS_FS 2021-12-17 16:56:35 +09:00
aio.c aio: move aio sysctl to aio.c 2022-01-22 08:33:34 +02:00
anon_inodes.c fs: add anon_inode_getfile_secure() similar to anon_inode_getfd_secure() 2021-09-19 22:35:37 -04:00
attr.c fs: handle circular mappings correctly 2021-11-17 09:26:09 +01:00
bad_inode.c vfs: add rcu argument to ->get_acl() callback 2021-08-18 22:08:24 +02:00
binfmt_aout.c binfmt: a.out: Fix bogus semicolon 2021-09-05 10:15:05 -07:00
binfmt_elf_fdpic.c coredump: Limit coredumps to a single thread group 2021-10-08 12:06:02 -05:00
binfmt_elf.c fs/binfmt_elf: use PT_LOAD p_align values for static PIE 2022-01-20 08:52:54 +02:00
binfmt_flat.c binfmt: remove in-tree usage of MAP_EXECUTABLE 2021-06-29 10:53:50 -07:00
binfmt_misc.c fs: move binfmt_misc sysctl to its own file 2022-01-22 08:33:35 +02:00
binfmt_script.c
buffer.c fs/buffer: Convert __block_write_begin_int() to take a folio 2021-12-16 15:49:51 -05:00
char_dev.c
compat_binfmt_elf.c
coredump.c fs/coredump: move coredump sysctls into its own file 2022-01-22 08:33:36 +02:00
d_path.c d_path: fix Kernel doc validator complaining 2021-11-06 13:30:32 -07:00
dax.c dax: remove the copy_from_iter and copy_to_iter methods 2021-12-18 08:04:53 -08:00
dcache.c fs: move dcache sysctls to its own file 2022-01-22 08:33:36 +02:00
direct-io.c fs: get rid of the res2 iocb->ki_complete argument 2021-10-25 10:36:24 -06:00
drop_caches.c fs: drop_caches: fix skipping over shadow cache inodes 2021-09-03 09:58:10 -07:00
eventfd.c eventfd: Export eventfd_wake_count to modules 2021-09-06 07:20:56 -04:00
eventpoll.c eventpoll: simplify sysctl declaration with register_sysctl() 2022-01-22 08:33:35 +02:00
exec.c fs/coredump: move coredump sysctls into its own file 2022-01-22 08:33:36 +02:00
fcntl.c Merge branch 'akpm' (patches from Andrew) 2021-09-03 10:08:28 -07:00
fhandle.c
file_table.c fs: move fs stat sysctls to file_table.c 2022-01-22 08:33:36 +02:00
file.c fget: clarify and improve __fget_files() implementation 2021-12-13 10:55:30 -08:00
filesystems.c fs: simplify get_filesystem_list / get_all_fs_names 2021-08-23 01:25:40 -04:00
fs_context.c vfs: fs_context: fix up param length parsing in legacy_parse_param 2022-01-18 09:23:19 +02:00
fs_parser.c fs_parse: allow parameter value to be empty 2021-12-09 14:09:36 -05:00
fs_pin.c
fs_struct.c
fs_types.c
fs-writeback.c fscache rewrite 2022-01-12 13:45:12 -08:00
fsopen.c
init.c
inode.c fs: move inode sysctls to its own file 2022-01-22 08:33:35 +02:00
internal.h fs/buffer: Convert __block_write_begin_int() to take a folio 2021-12-16 15:49:51 -05:00
io_uring.c io_uring: add a schedule point in io_add_buffers() 2022-02-15 07:47:16 -07:00
io-wq.c io_uring-5.17-2022-01-21 2022-01-21 16:07:21 +02:00
io-wq.h Merge branch 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2022-01-17 05:49:30 +02:00
ioctl.c fs/ioctl: remove unnecessary __user annotation 2022-01-15 16:30:25 +02:00
Kconfig cachefiles: Introduce rewritten driver 2022-01-07 13:40:39 +00:00
Kconfig.binfmt binfmt: remove support for em86 (alpha only) 2021-07-25 22:33:03 -07:00
kernel_read_file.c vfs: check fd has read access in kernel_read_file_from_fd() 2021-10-18 20:22:03 -10:00
libfs.c libfs: Support RENAME_EXCHANGE in simple_rename() 2021-11-03 15:43:08 +01:00
locks.c fs: move locking sysctls where they are used 2022-01-22 08:33:36 +02:00
Makefile fs: move namespace sysctls and declare fs base directory 2022-01-22 08:33:36 +02:00
mbcache.c
mount.h
mpage.c mm: remove cleancache 2022-01-22 08:33:38 +02:00
namei.c fs: move namei sysctls to its own file 2022-01-22 08:33:36 +02:00
namespace.c fs: move namespace sysctls and declare fs base directory 2022-01-22 08:33:36 +02:00
no-block.c
nsfs.c
open.c fs: support mapped mounts of mapped filesystems 2021-12-05 10:28:57 +01:00
pipe.c fs: move pipe sysctls to is own file 2022-01-22 08:33:36 +02:00
pnode.c
pnode.h
posix_acl.c fs: support mapped mounts of mapped filesystems 2021-12-05 10:28:57 +01:00
proc_namespace.c fs: add is_idmapped_mnt() helper 2021-12-03 18:44:06 +01:00
read_write.c fs: remove leftover comments from mandatory locking removal 2021-10-26 12:20:50 -04:00
readdir.c
remap_range.c fs: Convert vfs_dedupe_file_range_compare to folios 2022-01-08 00:28:41 -05:00
select.c select: Fix indefinitely sleeping task in poll_schedule_timeout() 2022-01-11 09:03:05 -08:00
seq_file.c seq_file: move seq_escape() to a header 2021-11-09 10:02:52 -08:00
signalfd.c Merge branch 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2022-01-17 05:49:30 +02:00
splice.c
stack.c
stat.c fs: add generic helper for filling statx attribute flags 2021-08-17 11:47:43 +02:00
statfs.c
super.c mm: remove cleancache 2022-01-22 08:33:38 +02:00
sync.c block: simplify the block device syncing code 2021-10-22 08:36:55 -06:00
sysctls.c fs: move namespace sysctls and declare fs base directory 2022-01-22 08:33:36 +02:00
timerfd.c timerfd: Provide timerfd_resume() 2021-08-10 17:57:22 +02:00
userfaultfd.c mm: move anon_vma declarations to linux/mm_inline.h 2022-01-15 16:30:27 +02:00
utimes.c
xattr.c