where we forgot to hold a lock while iterating a list that can change,
and finally a build fix that adds some stubs for clk APIs that are used
by devfreq drivers on platforms without the clk APIs.
-----BEGIN PGP SIGNATURE-----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=VQZe
-----END PGP SIGNATURE-----
Merge tag 'clk-fixes-for-linus' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk fixes from Stephen Boyd:
"Two fixes for the NKMP clks on Allwinner SoCs, a locking fix for
clkdev where we forgot to hold a lock while iterating a list that can
change, and finally a build fix that adds some stubs for clk APIs that
are used by devfreq drivers on platforms without the clk APIs"
* tag 'clk-fixes-for-linus' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: Add missing stubs for a few functions
clkdev: Hold clocks_mutex while iterating clocks list
clk: sunxi-ng: nkmp: Explain why zero width check is needed
clk: sunxi-ng: nkmp: Avoid GENMASK(-1, 0)
A few stable fixes at this round.
The USB Line6 audio fixes are a bit large, but they are rather trivial
and pretty much device-specific, so should be safe to apply at this
late stage. Ditto for other HD-audio quirks.
-----BEGIN PGP SIGNATURE-----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=CRYa
-----END PGP SIGNATURE-----
Merge tag 'sound-5.1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"A few stable fixes at this round.
The USB Line6 audio fixes are a bit large, but they are rather trivial
and pretty much device-specific, so should be safe to apply at this
late stage. Ditto for other HD-audio quirks"
* tag 'sound-5.1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda/realtek - Apply the fixup for ASUS Q325UAR
ALSA: line6: use dynamic buffers
ALSA: hda/realtek - Fixed Dell AIO speaker noise
ALSA: hda/realtek - Add new Dell platform for headset mode
Pull networking fixes from David Miller:
1) Out of bounds access in xfrm IPSEC policy unlink, from Yue Haibing.
2) Missing length check for esp4 UDP encap, from Sabrina Dubroca.
3) Fix byte order of RX STBC access in mac80211, from Johannes Berg.
4) Inifnite loop in bpftool map create, from Alban Crequy.
5) Register mark fix in ebpf verifier after pkt/null checks, from Paul
Chaignon.
6) Properly use rcu_dereference_sk_user_data in L2TP code, from Eric
Dumazet.
7) Buffer overrun in marvell phy driver, from Andrew Lunn.
8) Several crash and statistics handling fixes to bnxt_en driver, from
Michael Chan and Vasundhara Volam.
9) Several fixes to the TLS layer from Jakub Kicinski (copying negative
amounts of data in reencrypt, reencrypt frag copying, blind nskb->sk
NULL deref, etc).
10) Several UDP GRO fixes, from Paolo Abeni and Eric Dumazet.
11) PID/UID checks on ipv6 flow labels are inverted, from Willem de
Bruijn.
12) Use after free in l2tp, from Eric Dumazet.
13) IPV6 route destroy races, also from Eric Dumazet.
14) SCTP state machine can erroneously run recursively, fix from Xin
Long.
15) Adjust AF_PACKET msg_name length checks, add padding bytes if
necessary. From Willem de Bruijn.
16) Preserve skb_iif, so that forwarded packets have consistent values
even if fragmentation is involved. From Shmulik Ladkani.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (69 commits)
udp: fix GRO packet of death
ipv6: A few fixes on dereferencing rt->from
rds: ib: force endiannes annotation
selftests: fib_rule_tests: print the result and return 1 if any tests failed
ipv4: ip_do_fragment: Preserve skb_iif during fragmentation
net/tls: avoid NULL pointer deref on nskb->sk in fallback
selftests: fib_rule_tests: Fix icmp proto with ipv6
packet: validate msg_namelen in send directly
packet: in recvmsg msg_name return at least sizeof sockaddr_ll
sctp: avoid running the sctp state machine recursively
stmmac: pci: Fix typo in IOT2000 comment
Documentation: fix netdev-FAQ.rst markup warning
ipv6: fix races in ip6_dst_destroy()
l2ip: fix possible use-after-free
appletalk: Set error code if register_snap_client failed
net: dsa: bcm_sf2: fix buffer overflow doing set_rxnfc
rxrpc: Fix net namespace cleanup
ipv6/flowlabel: wait rcu grace period before put_pid()
vrf: Use orig netdev to count Ip6InNoRoutes and a fresh route lookup when sending dest unreach
tcp: add sanity tests in tcp_add_backlog()
...
-----BEGIN PGP SIGNATURE-----
iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAlzLBg4QHGF4Ym9lQGtl
cm5lbC5kawAKCRD301j7KXHgpsG8EACHxeAgDY3j+ZSLqn9sCFzvDo+hc9q2x64o
ydscoxcdRSZYAU1dP6bnjQBFZbwVHaDzYG11L9aPwlvbsxis9/XWASc/gCo8sumN
itmk3jKW5zYXlLw57ojh2+/UbPKnO5fKJcA66AakDGTopp3nYZQvov1kUJKOwTiz
Ir48vEwST4DU9szkfGGeKOGG735veU/yarUNyADwc+CIigBcIa/A/bZtY8P4xV5d
6bSLnMayehntZaHpVUPwDqOgP7+nSqIzQ88BPAKQnSzDat/SK4C0pgIX9L2nS1/4
7fBpg3/HN0sFgUuhAG/3ILD82yD3CWDGbt2xif2CP0ylvVOMB6d/ObDAIxwTBKVd
MwJ3U0RK+Ph2rvaglp6ifk3YgS0Nzt4N5F9AVmp32RR3QpqzJ2pLN4PUjbdWaEbr
lugu6uengn0flu90mesBazrVNrZkrZ2w859tq9TNWPYpdIthKrvNn44J1bXx+yUj
F1d+Bf0Sxxnc1b8hEKn9KOXPRoIY07hd/wUi2a/F4RVGSFa2b9CnaengqXIDzQNC
duEErt+Pd2xlBA4WhPlKSI2PmrWJvpDr7iuAiqdC8cC69hpF4F2/yWCiL+JYI4pF
v0zPn214KZ2rg9XZfb0Me8ff1BNvmXJMKzvecX2mOcclcO97PFVkqJhcx/75JE/6
ooQiTofl+w==
=KjZ4
-----END PGP SIGNATURE-----
Merge tag 'for-linus-20190502' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
"This is mostly io_uring fixes/tweaks. Most of these were actually done
in time for the last -rc, but I wanted to ensure that everything
tested out great before including them. The code delta looks larger
than it really is, as it's mostly just comment additions/changes.
Outside of the comment additions/changes, this is mostly removal of
unnecessary barriers. In all, this pull request contains:
- Tweak to how we handle errors at submission time. We now post a
completion event if the error occurs on behalf of an sqe, instead
of returning it through the system call. If the error happens
outside of a specific sqe, we return the error through the system
call. This makes it nicer to use and makes the "normal" use case
behave the same as the offload cases. (me)
- Fix for a missing req reference drop from async context (me)
- If an sqe is submitted with RWF_NOWAIT, don't punt it to async
context. Return -EAGAIN directly, instead of using it as a hint to
do async punt. (Stefan)
- Fix notes on barriers (Stefan)
- Remove unnecessary barriers (Stefan)
- Fix potential double free of memory in setup error (Mark)
- Further improve sq poll CPU validation (Mark)
- Fix page allocation warning and leak on buffer registration error
(Mark)
- Fix iov_iter_type() for new no-ref flag (Ming)
- Fix a case where dio doesn't honor bio no-page-ref (Ming)"
* tag 'for-linus-20190502' of git://git.kernel.dk/linux-block:
io_uring: avoid page allocation warnings
iov_iter: fix iov_iter_type
block: fix handling for BIO_NO_PAGE_REF
io_uring: drop req submit reference always in async punt
io_uring: free allocated io_memory once
io_uring: fix SQPOLL cpu validation
io_uring: have submission side sqe errors post a cqe
io_uring: remove unnecessary barrier after unsetting IORING_SQ_NEED_WAKEUP
io_uring: remove unnecessary barrier after incrementing dropped counter
io_uring: remove unnecessary barrier before reading SQ tail
io_uring: remove unnecessary barrier after updating SQ head
io_uring: remove unnecessary barrier before reading cq head
io_uring: remove unnecessary barrier before wq_has_sleeper
io_uring: fix notes on barriers
io_uring: fix handling SQEs requesting NOWAIT
-----BEGIN PGP SIGNATURE-----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=ajSb
-----END PGP SIGNATURE-----
Merge tag 'pci-v5.1-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI fixes from Bjorn Helgaas:
"I apologize for sending these so late in the cycle. We went back and
forth about how to deal with the unexpected logging of intentional
link state changes and finally decided to just config them off by
default.
PCI fixes:
- Stop ignoring "pci=disable_acs_redir" parameter (Logan Gunthorpe)
- Use shared MSI/MSI-X vector for Link Bandwidth Management (Alex
Williamson)
- Add Kconfig option for Link Bandwidth notification messages (Keith
Busch)"
* tag 'pci-v5.1-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
PCI/LINK: Add Kconfig option (default off)
PCI/portdrv: Use shared MSI/MSI-X vector for Bandwidth Management
PCI: Fix issue with "pci=disable_acs_redir" parameter being ignored
- Regression fix for the marvell nand driver.
-----BEGIN PGP SIGNATURE-----
iQJKBAABCAA0FiEEdgfidid8lnn52cLTZvlZhesYu8EFAlzGIXcWHHJpY2hhcmRA
c2lnbWEtc3Rhci5hdAAKCRBm+VmF6xi7wccEEACKboXDWT+qMkUbSEfsmAG0lGlz
gDxZ5/EH4Lfi7KzCWKyLLwM0xXH3ZLQ6vCg3jm2odbEiqKOWbIS/6kjoLdrYhngv
+7LYAYmByozowiERjZn80EOrGp88oddf5H9+iRINh6U9g3ACR9xM9PMejKtxqust
dHrTtSsZvyO6+lrjPqgmIwhZeqQ/4Lp1fzoNjVPi+mT39gfR8RlJw3PUnPvknjff
Uxi/XrJUZEDex4MzvUwSNtBhUm1Mz3AHa9/gUHmUdPhbXLyQ2Qcsy2RJlwUPfn1T
CUR33j5rTOu+ThC8Aydz2FxyZng0IU3BO3TQnEEz87dNCCYNAtIFDdr+Wm1uV/jI
l8+w0vbfS8GazUU/EcaKVFSvK+b/5BvppClol4m1miI0I1wF5NIpYaSyG/OqVy3y
vEcNzQTGokU5gJX8r7VgeIsvoXevL1AlngFhD+Rks+Q7kJ1F+vDzWaxZHO1RJ/tC
Livk6DswWDAKx492rsTlF0My/WMrsleVS/9qJXkXDEEucVOD0Iox3biatjx5juKY
DCzTwfr6Jd6144d4wL/4w4rI7atGAWciv5WBkGf9Xh7pnhOsIfQ6z3kF1JB1vlJL
uHgRq0Vg20p3DzdpUXuz8dliNY7RIjciDuhq8a3RYyP7VzZZbZJRF82qEZhsbXTQ
Y60r0yUqyOrR/mnhDg==
=4gBj
-----END PGP SIGNATURE-----
Merge tag 'mtd/fixes-for-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux
Pull MTD fix from Richard Weinberger:
"A single regression fix for the marvell nand driver"
* tag 'mtd/fixes-for-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux:
mtd: rawnand: marvell: Clean the controller state before each operation
e8303bb7a7 ("PCI/LINK: Report degraded links via link bandwidth
notification") added dmesg logging whenever a link changes speed or width
to a state that is considered degraded. Unfortunately, it cannot
differentiate signal integrity-related link changes from those
intentionally initiated by an endpoint driver, including drivers that may
live in userspace or VMs when making use of vfio-pci. Some GPU drivers
actively manage the link state to save power, which generates a stream of
messages like this:
vfio-pci 0000:07:00.0: 32.000 Gb/s available PCIe bandwidth, limited by 2.5 GT/s x16 link at 0000:00:02.0 (capable of 64.000 Gb/s with 5 GT/s x16 link)
Since we can't distinguish the intentional changes from the signal
integrity issues, leave the reporting turned off by default. Add a Kconfig
option to turn it on if desired.
Fixes: e8303bb7a7 ("PCI/LINK: Report degraded links via link bandwidth notification")
Link: https://lore.kernel.org/linux-pci/20190501142942.26972-1-keith.busch@intel.com
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
syzbot was able to crash host by sending UDP packets with a 0 payload.
TCP does not have this issue since we do not aggregate packets without
payload.
Since dev_gro_receive() sets gso_size based on skb_gro_len(skb)
it seems not worth trying to cope with padded packets.
BUG: KASAN: slab-out-of-bounds in skb_gro_receive+0xf5f/0x10e0 net/core/skbuff.c:3826
Read of size 16 at addr ffff88808893fff0 by task syz-executor612/7889
CPU: 0 PID: 7889 Comm: syz-executor612 Not tainted 5.1.0-rc7+ #96
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187
kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317
__asan_report_load16_noabort+0x14/0x20 mm/kasan/generic_report.c:133
skb_gro_receive+0xf5f/0x10e0 net/core/skbuff.c:3826
udp_gro_receive_segment net/ipv4/udp_offload.c:382 [inline]
call_gro_receive include/linux/netdevice.h:2349 [inline]
udp_gro_receive+0xb61/0xfd0 net/ipv4/udp_offload.c:414
udp4_gro_receive+0x763/0xeb0 net/ipv4/udp_offload.c:478
inet_gro_receive+0xe72/0x1110 net/ipv4/af_inet.c:1510
dev_gro_receive+0x1cd0/0x23c0 net/core/dev.c:5581
napi_gro_frags+0x36b/0xd10 net/core/dev.c:5843
tun_get_user+0x2f24/0x3fb0 drivers/net/tun.c:1981
tun_chr_write_iter+0xbd/0x156 drivers/net/tun.c:2027
call_write_iter include/linux/fs.h:1866 [inline]
do_iter_readv_writev+0x5e1/0x8e0 fs/read_write.c:681
do_iter_write fs/read_write.c:957 [inline]
do_iter_write+0x184/0x610 fs/read_write.c:938
vfs_writev+0x1b3/0x2f0 fs/read_write.c:1002
do_writev+0x15e/0x370 fs/read_write.c:1037
__do_sys_writev fs/read_write.c:1110 [inline]
__se_sys_writev fs/read_write.c:1107 [inline]
__x64_sys_writev+0x75/0xb0 fs/read_write.c:1107
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441cc0
Code: 05 48 3d 01 f0 ff ff 0f 83 9d 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 51 93 29 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 74 09 fc ff c3 48 83 ec 08 e8 ba 2b 00 00
RSP: 002b:00007ffe8c716118 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007ffe8c716150 RCX: 0000000000441cc0
RDX: 0000000000000001 RSI: 00007ffe8c716170 RDI: 00000000000000f0
RBP: 0000000000000000 R08: 000000000000ffff R09: 0000000000a64668
R10: 0000000020000040 R11: 0000000000000246 R12: 000000000000c2d9
R13: 0000000000402b50 R14: 0000000000000000 R15: 0000000000000000
Allocated by task 5143:
save_stack+0x45/0xd0 mm/kasan/common.c:75
set_track mm/kasan/common.c:87 [inline]
__kasan_kmalloc mm/kasan/common.c:497 [inline]
__kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:470
kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:505
slab_post_alloc_hook mm/slab.h:437 [inline]
slab_alloc mm/slab.c:3393 [inline]
kmem_cache_alloc+0x11a/0x6f0 mm/slab.c:3555
mm_alloc+0x1d/0xd0 kernel/fork.c:1030
bprm_mm_init fs/exec.c:363 [inline]
__do_execve_file.isra.0+0xaa3/0x23f0 fs/exec.c:1791
do_execveat_common fs/exec.c:1865 [inline]
do_execve fs/exec.c:1882 [inline]
__do_sys_execve fs/exec.c:1958 [inline]
__se_sys_execve fs/exec.c:1953 [inline]
__x64_sys_execve+0x8f/0xc0 fs/exec.c:1953
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 5351:
save_stack+0x45/0xd0 mm/kasan/common.c:75
set_track mm/kasan/common.c:87 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/common.c:459
kasan_slab_free+0xe/0x10 mm/kasan/common.c:467
__cache_free mm/slab.c:3499 [inline]
kmem_cache_free+0x86/0x260 mm/slab.c:3765
__mmdrop+0x238/0x320 kernel/fork.c:677
mmdrop include/linux/sched/mm.h:49 [inline]
finish_task_switch+0x47b/0x780 kernel/sched/core.c:2746
context_switch kernel/sched/core.c:2880 [inline]
__schedule+0x81b/0x1cc0 kernel/sched/core.c:3518
preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:3745
retint_kernel+0x1b/0x2d
arch_local_irq_restore arch/x86/include/asm/paravirt.h:767 [inline]
kmem_cache_free+0xab/0x260 mm/slab.c:3766
anon_vma_chain_free mm/rmap.c:134 [inline]
unlink_anon_vmas+0x2ba/0x870 mm/rmap.c:401
free_pgtables+0x1af/0x2f0 mm/memory.c:394
exit_mmap+0x2d1/0x530 mm/mmap.c:3144
__mmput kernel/fork.c:1046 [inline]
mmput+0x15f/0x4c0 kernel/fork.c:1067
exec_mmap fs/exec.c:1046 [inline]
flush_old_exec+0x8d9/0x1c20 fs/exec.c:1279
load_elf_binary+0x9bc/0x53f0 fs/binfmt_elf.c:864
search_binary_handler fs/exec.c:1656 [inline]
search_binary_handler+0x17f/0x570 fs/exec.c:1634
exec_binprm fs/exec.c:1698 [inline]
__do_execve_file.isra.0+0x1394/0x23f0 fs/exec.c:1818
do_execveat_common fs/exec.c:1865 [inline]
do_execve fs/exec.c:1882 [inline]
__do_sys_execve fs/exec.c:1958 [inline]
__se_sys_execve fs/exec.c:1953 [inline]
__x64_sys_execve+0x8f/0xc0 fs/exec.c:1953
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The buggy address belongs to the object at ffff88808893f7c0
which belongs to the cache mm_struct of size 1496
The buggy address is located 600 bytes to the right of
1496-byte region [ffff88808893f7c0, ffff88808893fd98)
The buggy address belongs to the page:
page:ffffea0002224f80 count:1 mapcount:0 mapping:ffff88821bc40ac0 index:0xffff88808893f7c0 compound_mapcount: 0
flags: 0x1fffc0000010200(slab|head)
raw: 01fffc0000010200 ffffea00025b4f08 ffffea00027b9d08 ffff88821bc40ac0
raw: ffff88808893f7c0 ffff88808893e440 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88808893fe80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88808893ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88808893ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff888088940000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888088940080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Fixes: e20cf8d3f1 ("udp: implement GRO for plain UDP sockets.")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
* cpcap-battery: fix a division by zero
* core: fix systemd issue due to log messages produced by uevent
-----BEGIN PGP SIGNATURE-----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=Q783
-----END PGP SIGNATURE-----
Merge tag 'for-v5.1-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply
Pull power supply fixes from Sebastian Reichel:
"Two more fixes for the 5.1 cycle.
One division by zero fix in a specific driver and one core workaround
for bad userspace behaviour from systemd regarding uevents. IMHO this
can be considered to be a userspace bug, but the debug messages are
useless anyways
- cpcap-battery: fix a division by zero
- core: fix systemd issue due to log messages produced by uevent"
* tag 'for-v5.1-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply:
power: supply: sysfs: prevent endless uevent loop with CONFIG_POWER_SUPPLY_DEBUG
power: supply: cpcap-battery: Fix division by zero
It is a followup after the fix in
commit 9c69a13205 ("route: Avoid crash from dereferencing NULL rt->from")
rt6_do_redirect():
1. NULL checking is needed on rt->from because a parallel
fib6_info delete could happen that sets rt->from to NULL.
(e.g. rt6_remove_exception() and fib6_drop_pcpu_from()).
2. fib6_info_hold() is not enough. Same reason as (1).
Meaning, holding dst->__refcnt cannot ensure
rt->from is not NULL or rt->from->fib6_ref is not 0.
Instead of using fib6_info_hold_safe() which ip6_rt_cache_alloc()
is already doing, this patch chooses to extend the rcu section
to keep "from" dereference-able after checking for NULL.
inet6_rtm_getroute():
1. NULL checking is also needed on rt->from for a similar reason.
Note that inet6_rtm_getroute() is using RTNL_FLAG_DOIT_UNLOCKED.
Fixes: a68886a691 ("net/ipv6: Make from in rt6_info rcu protected")
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Wei Wang <weiwan@google.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
While the endiannes is being handled correctly as indicated by the comment
above the offending line - sparse was unhappy with the missing annotation
as be64_to_cpu() expects a __be64 argument. To mitigate this annotation
all involved variables are changed to a consistent __le64 and the
conversion to uint64_t delayed to the call to rds_cong_map_updated().
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
- regression in memset if line size !64
- avoid panic if PAE and IOC
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=Qm+2
-----END PGP SIGNATURE-----
Merge tag 'arc-5.1-final' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull ARC fixes from Vineet Gupta:
"A few minor fixes for ARC.
- regression in memset if line size !64
- avoid panic if PAE and IOC"
* tag 'arc-5.1-final' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
ARC: memset: fix build with L1_CACHE_SHIFT != 6
ARC: [hsdk] Make it easier to add PAE40 region to DTB
ARC: PAE40: don't panic and instead turn off hw ioc
The Interrupt Message Number in the PCIe Capabilities register (PCIe r4.0,
sec 7.5.3.2) indicates which MSI/MSI-X vector is shared by interrupts
related to the PCIe Capability, including Link Bandwidth Management and
Link Autonomous Bandwidth Interrupts (Link Control, 7.5.3.7), Command
Completed and Hot-Plug Interrupts (Slot Control, 7.5.3.10), and the PME
Interrupt (Root Control, 7.5.3.12).
pcie_message_numbers() checked whether we want to enable PME or Hot-Plug
interrupts but neglected to check for Link Bandwidth Management, so if we
only wanted the Bandwidth Management interrupts, it decided we didn't need
any vectors at all. Then pcie_port_enable_irq_vec() tried to reallocate
zero vectors, which failed, resulting in fallback to INTx.
On some systems, e.g., an X79-based workstation, that INTx seems broken or
not handled correctly, so we got spurious IRQ16 interrupts for Bandwidth
Management events.
Change pcie_message_numbers() so that if we want Link Bandwidth Management
interrupts, we use the shared MSI/MSI-X vector from the PCIe Capabilities
register.
Fixes: e8303bb7a7 ("PCI/LINK: Report degraded links via link bandwidth notification")
Link: https://lore.kernel.org/lkml/155597243666.19387.1205950870601742062.stgit@gimli.home
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
[bhelgaas: changelog]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Revert a recent ACPICA change that caused initialization to fail on
systems with Thunderbolt docking stations connected at the init time.
-----BEGIN PGP SIGNATURE-----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=2XoK
-----END PGP SIGNATURE-----
Merge tag 'acpi-5.1-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fix from Rafael Wysocki:
"Revert a recent ACPICA change that caused initialization to fail on
systems with Thunderbolt docking stations connected at the init time"
* tag 'acpi-5.1-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
Revert "ACPICA: Clear status of GPEs before enabling them"
The 'extent_type' variable does seem to be reliably initialized, but
it's _very_ non-obvious, since there's a "goto next" case that jumps
over the normal initialization. That will then always trigger the
"start >= extent_end" test, which will end up never falling through to
the use of that variable.
But the code is certainly not obvious, and the compiler warning looks
reasonable. Make 'extent_type' an int, and initialize it to an invalid
negative value, which seems to be the common pattern in other places.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fixes: 65b2b4939a ("selftests: net: initial fib rule tests")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The pvlock_page and hvclock_page variables are (as the name implies)
addresses to pages, created by the linker script.
But we declared them as just "extern u8" variables, which _works_, but
now that gcc does some more bounds checking, it causes warnings like
warning: array subscript 1 is outside array bounds of ‘u8[1]’
when we then access more than one byte from those variables.
Fix this by simply making the declaration of the variables match
reality, which makes the compiler happy too.
Signed-off-by: Linus Torvalds <torvalds@-linux-foundation.org>
I'm not sure what made gcc warn about this code now. The 'ret' variable
does end up initialized in all cases, but it's definitely not obvious,
so the compiler is quite reasonable to warn about this.
So just add initialization to make it all much more obvious both to
compilers and to humans.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We already did this for clang, but now gcc has that warning too. Yes,
yes, the address may be unaligned. And that's kind of the point.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Previously, during fragmentation after forwarding, skb->skb_iif isn't
preserved, i.e. 'ip_copy_metadata' does not copy skb_iif from given
'from' skb.
As a result, ip_do_fragment's creates fragments with zero skb_iif,
leading to inconsistent behavior.
Assume for example an eBPF program attached at tc egress (post
forwarding) that examines __sk_buff->ingress_ifindex:
- the correct iif is observed if forwarding path does not involve
fragmentation/refragmentation
- a bogus iif is observed if forwarding path involves
fragmentation/refragmentatiom
Fix, by preserving skb_iif during 'ip_copy_metadata'.
Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In io_sqe_buffer_register() we allocate a number of arrays based on the
iov_len from the user-provided iov. While we limit iov_len to SZ_1G,
we can still attempt to allocate arrays exceeding MAX_ORDER.
On a 64-bit system with 4KiB pages, for an iov where iov_base = 0x10 and
iov_len = SZ_1G, we'll calculate that nr_pages = 262145. When we try to
allocate a corresponding array of (16-byte) bio_vecs, requiring 4194320
bytes, which is greater than 4MiB. This results in SLUB warning that
we're trying to allocate greater than MAX_ORDER, and failing the
allocation.
Avoid this by using kvmalloc() for allocations dependent on the
user-provided iov_len. At the same time, fix a leak of imu->bvec when
registration fails.
Full splat from before this patch:
WARNING: CPU: 1 PID: 2314 at mm/page_alloc.c:4595 __alloc_pages_nodemask+0x7ac/0x2938 mm/page_alloc.c:4595
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 2314 Comm: syz-executor326 Not tainted 5.1.0-rc7-dirty #4
Hardware name: linux,dummy-virt (DT)
Call trace:
dump_backtrace+0x0/0x2f0 include/linux/compiler.h:193
show_stack+0x20/0x30 arch/arm64/kernel/traps.c:158
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x110/0x190 lib/dump_stack.c:113
panic+0x384/0x68c kernel/panic.c:214
__warn+0x2bc/0x2c0 kernel/panic.c:571
report_bug+0x228/0x2d8 lib/bug.c:186
bug_handler+0xa0/0x1a0 arch/arm64/kernel/traps.c:956
call_break_hook arch/arm64/kernel/debug-monitors.c:301 [inline]
brk_handler+0x1d4/0x388 arch/arm64/kernel/debug-monitors.c:316
do_debug_exception+0x1a0/0x468 arch/arm64/mm/fault.c:831
el1_dbg+0x18/0x8c
__alloc_pages_nodemask+0x7ac/0x2938 mm/page_alloc.c:4595
alloc_pages_current+0x164/0x278 mm/mempolicy.c:2132
alloc_pages include/linux/gfp.h:509 [inline]
kmalloc_order+0x20/0x50 mm/slab_common.c:1231
kmalloc_order_trace+0x30/0x2b0 mm/slab_common.c:1243
kmalloc_large include/linux/slab.h:480 [inline]
__kmalloc+0x3dc/0x4f0 mm/slub.c:3791
kmalloc_array include/linux/slab.h:670 [inline]
io_sqe_buffer_register fs/io_uring.c:2472 [inline]
__io_uring_register fs/io_uring.c:2962 [inline]
__do_sys_io_uring_register fs/io_uring.c:3008 [inline]
__se_sys_io_uring_register fs/io_uring.c:2990 [inline]
__arm64_sys_io_uring_register+0x9e0/0x1bc8 fs/io_uring.c:2990
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall arch/arm64/kernel/syscall.c:47 [inline]
el0_svc_common.constprop.0+0x148/0x2e0 arch/arm64/kernel/syscall.c:83
el0_svc_handler+0xdc/0x100 arch/arm64/kernel/syscall.c:129
el0_svc+0x8/0xc arch/arm64/kernel/entry.S:948
SMP: stopping secondary CPUs
Dumping ftrace buffer:
(ftrace buffer empty)
Kernel Offset: disabled
CPU features: 0x002,23000438
Memory Limit: none
Rebooting in 1 seconds..
Fixes: edafccee56 ("io_uring: add support for pre-mapped user IO buffers")
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-block@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
update_chksum() accesses nskb->sk before it has been set
by complete_skb(), move the init up.
Fixes: e8f6979981 ("net/tls: Add generic NIC offload infrastructure")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
A recent commit returns an error if icmp is used as the ip-proto for
IPv6 fib rules. Update fib_rule_tests to send ipv6-icmp instead of icmp.
Fixes: 5e1a99eae8 ("ipv4: Add ICMPv6 support when parse route ipproto")
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Packet sockets in datagram mode take a destination address. Verify its
length before passing to dev_hard_header.
Prior to 2.6.14-rc3, the send code ignored sll_halen. This is
established behavior. Directly compare msg_namelen to dev->addr_len.
Change v1->v2: initialize addr in all paths
Fixes: 6b8d95f179 ("packet: validate address length if non-zero")
Suggested-by: David Laight <David.Laight@aculab.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Packet send checks that msg_name is at least sizeof sockaddr_ll.
Packet recv must return at least this length, so that its output
can be passed unmodified to packet send.
This ceased to be true since adding support for lladdr longer than
sll_addr. Since, the return value uses true address length.
Always return at least sizeof sockaddr_ll, even if address length
is shorter. Zero the padding bytes.
Change v1->v2: do not overwrite zeroed padding again. use copy_len.
Fixes: 0fb375fb9b ("[AF_PACKET]: Allow for > 8 byte hardware addresses.")
Suggested-by: David Laight <David.Laight@aculab.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit 875f1d0769 ("iov_iter: add ITER_BVEC_FLAG_NO_REF flag")
introduces one extra flag of ITER_BVEC_FLAG_NO_REF, and this flag
is stored into iter->type.
However, iov_iter_type() doesn't consider the new added flag, fix
it by masking this flag in iov_iter_type().
Fixes: 875f1d0769 ("iov_iter: add ITER_BVEC_FLAG_NO_REF flag")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Commit 399254aaf4 ("block: add BIO_NO_PAGE_REF flag") introduces
BIO_NO_PAGE_REF, and once this flag is set for one bio, all pages
in the bio won't be get/put during IO.
However, if one bio is submitted via __blkdev_direct_IO_simple(),
even though BIO_NO_PAGE_REF is set, pages still may be put.
Fixes this issue by avoiding to put pages if BIO_NO_PAGE_REF is
set.
Fixes: 399254aaf4 ("block: add BIO_NO_PAGE_REF flag")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
If we don't end up actually calling submit in io_sq_wq_submit_work(),
we still need to drop the submit reference to the request. If we
don't, then we can leak the request. This can happen if we race
with ring shutdown while flushing the workqueue for requests that
require use of the mm_struct.
Fixes: e65ef56db4 ("io_uring: use regular request ref counts")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
In io_sq_offload_start(), we call cpu_possible() on an unbounded cpu
value from userspace. On v5.1-rc7 on arm64 with
CONFIG_DEBUG_PER_CPU_MAPS, this results in a splat:
WARNING: CPU: 1 PID: 27601 at include/linux/cpumask.h:121 cpu_max_bits_warn include/linux/cpumask.h:121 [inline]
There was an attempt to fix this in commit:
917257daa0 ("io_uring: only test SQPOLL cpu after we've verified it")
... by adding a check after the cpu value had been limited to NR_CPU_IDS
using array_index_nospec(). However, this left an unbound check at the
start of the function, for which the warning still fires.
Let's fix this correctly by checking that the cpu value is bound by
nr_cpu_ids before passing it to cpu_possible(). Note that only
nr_cpu_ids of a cpumask are guaranteed to exist at runtime, and
nr_cpu_ids can be significantly smaller than NR_CPUs. For example, an
arm64 defconfig has NR_CPUS=256, while my test VM has 4 vCPUs.
Following the intent from the commit message for 917257daa0, the
check is moved under the SQ_AFF branch, which is the only branch where
the cpu values is consumed. The check is performed before bounding the
value with array_index_nospec() so that we don't silently accept bogus
cpu values from userspace, where array_index_nospec() would force these
values to 0.
I suspect we can remove the array_index_nospec() call entirely, but I've
conservatively left that in place, updated to use nr_cpu_ids to match
the prior check.
Tested on arm64 with the Syzkaller reproducer:
https://syzkaller.appspot.com/bug?extid=cd714a07c6de2bc34293https://syzkaller.appspot.com/x/repro.syz?x=15d8b397200000
Full splat from before this patch:
WARNING: CPU: 1 PID: 27601 at include/linux/cpumask.h:121 cpu_max_bits_warn include/linux/cpumask.h:121 [inline]
WARNING: CPU: 1 PID: 27601 at include/linux/cpumask.h:121 cpumask_check include/linux/cpumask.h:128 [inline]
WARNING: CPU: 1 PID: 27601 at include/linux/cpumask.h:121 cpumask_test_cpu include/linux/cpumask.h:344 [inline]
WARNING: CPU: 1 PID: 27601 at include/linux/cpumask.h:121 io_sq_offload_start fs/io_uring.c:2244 [inline]
WARNING: CPU: 1 PID: 27601 at include/linux/cpumask.h:121 io_uring_create fs/io_uring.c:2864 [inline]
WARNING: CPU: 1 PID: 27601 at include/linux/cpumask.h:121 io_uring_setup+0x1108/0x15a0 fs/io_uring.c:2916
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 27601 Comm: syz-executor.0 Not tainted 5.1.0-rc7 #3
Hardware name: linux,dummy-virt (DT)
Call trace:
dump_backtrace+0x0/0x2f0 include/linux/compiler.h:193
show_stack+0x20/0x30 arch/arm64/kernel/traps.c:158
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x110/0x190 lib/dump_stack.c:113
panic+0x384/0x68c kernel/panic.c:214
__warn+0x2bc/0x2c0 kernel/panic.c:571
report_bug+0x228/0x2d8 lib/bug.c:186
bug_handler+0xa0/0x1a0 arch/arm64/kernel/traps.c:956
call_break_hook arch/arm64/kernel/debug-monitors.c:301 [inline]
brk_handler+0x1d4/0x388 arch/arm64/kernel/debug-monitors.c:316
do_debug_exception+0x1a0/0x468 arch/arm64/mm/fault.c:831
el1_dbg+0x18/0x8c
cpu_max_bits_warn include/linux/cpumask.h:121 [inline]
cpumask_check include/linux/cpumask.h:128 [inline]
cpumask_test_cpu include/linux/cpumask.h:344 [inline]
io_sq_offload_start fs/io_uring.c:2244 [inline]
io_uring_create fs/io_uring.c:2864 [inline]
io_uring_setup+0x1108/0x15a0 fs/io_uring.c:2916
__do_sys_io_uring_setup fs/io_uring.c:2929 [inline]
__se_sys_io_uring_setup fs/io_uring.c:2926 [inline]
__arm64_sys_io_uring_setup+0x50/0x70 fs/io_uring.c:2926
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall arch/arm64/kernel/syscall.c:47 [inline]
el0_svc_common.constprop.0+0x148/0x2e0 arch/arm64/kernel/syscall.c:83
el0_svc_handler+0xdc/0x100 arch/arm64/kernel/syscall.c:129
el0_svc+0x8/0xc arch/arm64/kernel/entry.S:948
SMP: stopping secondary CPUs
Dumping ftrace buffer:
(ftrace buffer empty)
Kernel Offset: disabled
CPU features: 0x002,23000438
Memory Limit: none
Rebooting in 1 seconds..
Fixes: 917257daa0 ("io_uring: only test SQPOLL cpu after we've verified it")
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: linux-block@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Simplied the logic
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Ying triggered a call trace when doing an asconf testing:
BUG: scheduling while atomic: swapper/12/0/0x10000100
Call Trace:
<IRQ> [<ffffffffa4375904>] dump_stack+0x19/0x1b
[<ffffffffa436fcaf>] __schedule_bug+0x64/0x72
[<ffffffffa437b93a>] __schedule+0x9ba/0xa00
[<ffffffffa3cd5326>] __cond_resched+0x26/0x30
[<ffffffffa437bc4a>] _cond_resched+0x3a/0x50
[<ffffffffa3e22be8>] kmem_cache_alloc_node+0x38/0x200
[<ffffffffa423512d>] __alloc_skb+0x5d/0x2d0
[<ffffffffc0995320>] sctp_packet_transmit+0x610/0xa20 [sctp]
[<ffffffffc098510e>] sctp_outq_flush+0x2ce/0xc00 [sctp]
[<ffffffffc098646c>] sctp_outq_uncork+0x1c/0x20 [sctp]
[<ffffffffc0977338>] sctp_cmd_interpreter.isra.22+0xc8/0x1460 [sctp]
[<ffffffffc0976ad1>] sctp_do_sm+0xe1/0x350 [sctp]
[<ffffffffc099443d>] sctp_primitive_ASCONF+0x3d/0x50 [sctp]
[<ffffffffc0977384>] sctp_cmd_interpreter.isra.22+0x114/0x1460 [sctp]
[<ffffffffc0976ad1>] sctp_do_sm+0xe1/0x350 [sctp]
[<ffffffffc097b3a4>] sctp_assoc_bh_rcv+0xf4/0x1b0 [sctp]
[<ffffffffc09840f1>] sctp_inq_push+0x51/0x70 [sctp]
[<ffffffffc099732b>] sctp_rcv+0xa8b/0xbd0 [sctp]
As it shows, the first sctp_do_sm() running under atomic context (NET_RX
softirq) invoked sctp_primitive_ASCONF() that uses GFP_KERNEL flag later,
and this flag is supposed to be used in non-atomic context only. Besides,
sctp_do_sm() was called recursively, which is not expected.
Vlad tried to fix this recursive call in Commit c078669340 ("sctp: Fix
oops when sending queued ASCONF chunks") by introducing a new command
SCTP_CMD_SEND_NEXT_ASCONF. But it didn't work as this command is still
used in the first sctp_do_sm() call, and sctp_primitive_ASCONF() will
be called in this command again.
To avoid calling sctp_do_sm() recursively, we send the next queued ASCONF
not by sctp_primitive_ASCONF(), but by sctp_sf_do_prm_asconf() in the 1st
sctp_do_sm() directly.
Reported-by: Ying Xu <yinxu@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fix ReST underline warning:
./Documentation/networking/netdev-FAQ.rst:135: WARNING: Title underline too short.
Q: I made changes to only a few patches in a patch series should I resend only those changed?
--------------------------------------------------------------------------------------------
Fixes: ffa9125373 ("Documentation: networking: Update netdev-FAQ regarding patches")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Currently we only post a cqe if we get an error OUTSIDE of submission.
For submission, we return the error directly through io_uring_enter().
This is a bit awkward for applications, and it makes more sense to
always post a cqe with an error, if the error happens on behalf of an
sqe.
This changes submission behavior a bit. io_uring_enter() returns -ERROR
for an error, and > 0 for number of sqes submitted. Before this change,
if you wanted to submit 8 entries and had an error on the 5th entry,
io_uring_enter() would return 4 (for number of entries successfully
submitted) and rewind the sqring. The application would then have to
peek at the sqring and figure out what was wrong with the head sqe, and
then skip it itself. With this change, we'll return 5 since we did
consume 5 sqes, and the last sqe (with the error) will result in a cqe
being posted with the error.
This makes the logic easier to handle in the application, and it cleans
up the submission part.
Suggested-by: Stefan Bühler <source@stbuehler.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Pull fsnotify fix from Jan Kara:
"A fix of user trigerable NULL pointer dereference syzbot has recently
spotted.
The problem was introduced in this merge window so no CC stable is
needed"
* tag 'fsnotify_for_v5.1-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
fsnotify: Fix NULL ptr deref in fanotify_get_fsid()
Revert commit c8b1917c89 ("ACPICA: Clear status of GPEs before
enabling them") that causes problems with Thunderbolt controllers
to occur if a dock device is connected at init time (the xhci_hcd
and thunderbolt modules crash which prevents peripherals connected
through them from working).
Commit c8b1917c89 effectively causes commit ecc1165b8b ("ACPICA:
Dispatch active GPEs at init time") to get undone, so the problem
addressed by commit ecc1165b8b appears again as a result of it.
Fixes: c8b1917c89 ("ACPICA: Clear status of GPEs before enabling them")
Link: https://lore.kernel.org/lkml/s5hy33siofw.wl-tiwai@suse.de/T/#u
Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1132943
Reported-by: Michael Hirmke <opensuse@mike.franken.de>
Reported-by: Takashi Iwai <tiwai@suse.de>
Cc: 4.17+ <stable@vger.kernel.org> # 4.17+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Third set of fixes for 5.1.
iwlwifi
* fix an oops when creating debugfs entries
* fix bug when trying to capture debugging info while in rfkill
* prevent potential uninitialized memory dumps into debugging logs
* fix some initialization parameters for AX210 devices
* fix an oops with non-MSIX devices
* fix an oops when we receive a packet with bogus lengths
* fix a bug that prevented 5350 devices from working
* fix a small merge damage from the previous series
mwifiex
* fig regression with resume on SDIO
ath10k
* fix locking problem with crashdump
* fix warnings during suspend and resume
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQEcBAABAgAGBQJcyGH/AAoJEG4XJFUm622b3AIH/R/Af8W3E69s1jLpbwVpcnKX
jucK1WePDwgTttUI4cmtpCIlLImTiiMxgWd+ku7tpwz4kMJWY8KOjrvwN3ulNGUr
R0Vbsyc/CXS41DtfZt8IpckF3ru1omtdmBTfMEermoPbZZNtx1j34Odkn0VtEcjW
7Ml7u6YfZc/tKgWmIO6afhqMRgnChWGhK76ayCF7/9YM17uSoGw+rdLIM8o20+jE
VwMbhvNuZILwTZ35mbi1Tnbz8dZr/1J7yMqrmfuZFkpLseWixcQ6zK53A8PTJ0Cf
6B+fiu7+9mUzNaqzuemlYrZ2PsGXprdjrBNaHcnRrc3+GZlilKcDFQQCPWrpmz8=
=WiMH
-----END PGP SIGNATURE-----
Merge tag 'wireless-drivers-for-davem-2019-04-30' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers
Kalle Valo says:
====================
wireless-drivers fixes for 5.1
Third set of fixes for 5.1.
iwlwifi
* fix an oops when creating debugfs entries
* fix bug when trying to capture debugging info while in rfkill
* prevent potential uninitialized memory dumps into debugging logs
* fix some initialization parameters for AX210 devices
* fix an oops with non-MSIX devices
* fix an oops when we receive a packet with bogus lengths
* fix a bug that prevented 5350 devices from working
* fix a small merge damage from the previous series
mwifiex
* fig regression with resume on SDIO
ath10k
* fix locking problem with crashdump
* fix warnings during suspend and resume
Also note that this pull conflicts with net-next. And I want to emphasie
that it's really net-next, so when you pull this to net tree it should
go without conflicts. Stephen reported the conflict here:
https://lkml.kernel.org/r/20190429115338.5decb50b@canb.auug.org.au
In iwlwifi oddly commit 154d4899e4 adds the IS_ERR_OR_NULL() in
wireless-drivers but commit c9af7528c3 removes the whole check in
wireless-drivers-next. The fix is easy, just drop the whole check for
mvmvif->dbgfs_dir in iwlwifi/mvm/debugfs-vif.c, it's unneeded anyway.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Here are some small USB fixes for a bunch of warnings/errors that the
syzbot has been finding with it's new-found ability to stress-test the
USB layer.
All of these are tiny, but fix real issues, and are marked for stable as
well. All of these have had lots of testing in linux-next as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCXMhb1Q8cZ3JlZ0Brcm9h
aC5jb20ACgkQMUfUDdst+ykHdQCeMK3TfwWjqSSCcgvbTaxhvx8Fwg4AoJRLspLh
FgVo+vaKf6SFlZdAVSJ8
=28RC
-----END PGP SIGNATURE-----
Merge tag 'usb-5.1-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are some small USB fixes for a bunch of warnings/errors that the
syzbot has been finding with it's new-found ability to stress-test the
USB layer.
All of these are tiny, but fix real issues, and are marked for stable
as well. All of these have had lots of testing in linux-next as well"
* tag 'usb-5.1-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
USB: w1 ds2490: Fix bug caused by improper use of altsetting array
USB: yurex: Fix protection fault after device removal
usb: usbip: fix isoc packet num validation in get_pipe
USB: core: Fix bug caused by duplicate interface PM usage counter
USB: dummy-hcd: Fix failure to give back unlinked URBs
USB: core: Fix unterminated string returned by usb_string()
There is no operation to order with afterwards, and removing the flag is
not critical in any way.
There will always be a "race condition" where the application will
trigger IORING_ENTER_SQ_WAKEUP when it isn't actually needed.
Signed-off-by: Stefan Bühler <source@stbuehler.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
smp_store_release in io_commit_sqring already orders the store to
dropped before the update to SQ head.
Signed-off-by: Stefan Bühler <source@stbuehler.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
The memory operations before reading cq head are unrelated and we
don't care about their order.
Document that the control dependency in combination with READ_ONCE and
WRITE_ONCE forms a barrier we need.
Signed-off-by: Stefan Bühler <source@stbuehler.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
wq_has_sleeper has a full barrier internally. The smp_rmb barrier in
io_uring_poll synchronizes with it.
Signed-off-by: Stefan Bühler <source@stbuehler.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
The application reading the CQ ring needs a barrier to pair with the
smp_store_release in io_commit_cqring, not the barrier after it.
Also a write barrier *after* writing something (but not *before*
writing anything interesting) doesn't order anything, so an smp_wmb()
after writing SQ tail is not needed.
Additionally consider reading SQ head and writing CQ tail in the notes.
Also add some clarifications how the various other fields in the ring
buffers are used.
Signed-off-by: Stefan Bühler <source@stbuehler.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Not all request types set REQ_F_FORCE_NONBLOCK when they needed async
punting; reverse logic instead and set REQ_F_NOWAIT if request mustn't
be punted.
Signed-off-by: Stefan Bühler <source@stbuehler.de>
Merged with my previous patch for this.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
-----BEGIN PGP SIGNATURE-----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=POTH
-----END PGP SIGNATURE-----
Merge tag 'selinux-pr-20190429' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux
Pull selinux fix from Paul Moore:
"One small patch for the stable folks to fix a problem when building
against the latest glibc.
I'll be honest and say that I'm not really thrilled with the idea of
sending this up right now, but Greg is a little annoyed so here I
figured I would at least send this"
* tag 'selinux-pr-20190429' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
selinux: use kernel linux/socket.h for genheaders and mdp
If register_snap_client fails in atalk_init,
error code should be set, otherwise it will
triggers NULL pointer dereference while unloading
module.
Fixes: 9804501fa1 ("appletalk: Fix potential NULL pointer dereference in unregister_snap_client")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
