Hello,
syzbot found the following issue on:
HEAD commit: ef8e4d3c2ab1 Merge tag 'hwmon-for-v5.18-rc6' of git://git...
git tree: upstream
console output:
https://syzkaller.appspot.com/x/log.txt?x=1274a3eef00000
kernel config:
https://syzkaller.appspot.com/x/.config?x=56ab790dd668ef2a
dashboard link:
https://syzkaller.appspot.com/bug?extid=dcad781df3a80a14e325
compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
CC: [
asml.s...@gmail.com ax...@kernel.dk io-u...@vger.kernel.org linux-...@vger.kernel.org]
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+dcad78...@syzkaller.appspotmail.com
==================================================================
BUG: KCSAN: data-race in io_wq_worker_running / io_wqe_activate_free_worker
write to 0xffff88812b689f04 of 4 bytes by task 4250 on cpu 0:
io_wq_worker_running+0x60/0xa0 fs/io-wq.c:691
schedule_timeout+0xc1/0x290 kernel/time/timer.c:1884
io_wqe_worker+0x396/0x940 fs/io-wq.c:659
ret_from_fork+0x1f/0x30
read to 0xffff88812b689f04 of 4 bytes by task 4248 on cpu 1:
io_wqe_get_acct fs/io-wq.c:173 [inline]
io_wqe_activate_free_worker+0xf8/0x2b0 fs/io-wq.c:272
io_wqe_enqueue+0x2f0/0x500 fs/io-wq.c:940
io_wq_enqueue+0x31/0x40 fs/io-wq.c:973
io_queue_async_work+0x229/0x370 fs/io_uring.c:1707
io_queue_sqe_fallback+0x84/0xd0 fs/io_uring.c:7541
io_queue_sqe fs/io_uring.c:7551 [inline]
io_submit_sqe+0x3394/0x4300 fs/io_uring.c:7754
io_submit_sqes+0x25e/0x7e0 fs/io_uring.c:7860
__do_sys_io_uring_enter fs/io_uring.c:10805 [inline]
__se_sys_io_uring_enter+0x2cb/0xc70 fs/io_uring.c:10731
__x64_sys_io_uring_enter+0x74/0x80 fs/io_uring.c:10731
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
value changed: 0x0000000d -> 0x0000000b
Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 4248 Comm: syz-executor.2 Not tainted 5.18.0-rc5-syzkaller-00014-gef8e4d3c2ab1-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
---
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