From: syzbot <syzbot+d6218cb2fae0b2411e9d@syzkaller.appspotmail.com>
To: asml.silence@gmail.com, axboe@kernel.dk,
io-uring@vger.kernel.org, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: [syzbot] WARNING in __percpu_ref_exit (2)
Date: Mon, 15 Mar 2021 04:58:22 -0700 [thread overview]
Message-ID: <0000000000006e9e0705bd91f762@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 75013c6c Merge tag 'perf_urgent_for_v5.12-rc3' of git://gi..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=174df32ad00000
kernel config: https://syzkaller.appspot.com/x/.config?x=844457676c06b88c
dashboard link: https://syzkaller.appspot.com/bug?extid=d6218cb2fae0b2411e9d
userspace arch: i386
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+d6218cb2fae0b2411e9d@syzkaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 1 PID: 53 at lib/percpu-refcount.c:113 __percpu_ref_exit+0x98/0x100 lib/percpu-refcount.c:113
Modules linked in:
CPU: 1 PID: 53 Comm: kworker/u4:2 Not tainted 5.12.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound io_ring_exit_work
RIP: 0010:__percpu_ref_exit+0x98/0x100 lib/percpu-refcount.c:113
Code: fd 49 8d 7c 24 10 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 61 49 83 7c 24 10 00 74 07 e8 28 42 ac fd <0f> 0b e8 21 42 ac fd 48 89 ef e8 e9 fa da fd 48 89 da 48 b8 00 00
RSP: 0018:ffffc90000f1fb78 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88805c976000 RCX: 0000000000000000
RDX: ffff888011839bc0 RSI: ffffffff83c76be8 RDI: ffff88802b2a9010
RBP: 0000607f46077778 R08: 0000000000000000 R09: ffffffff8fab0967
R10: ffffffff83c76b88 R11: 0000000000000009 R12: ffff88802b2a9000
R13: 0000000000000001 R14: ffff88802b2a9000 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000085a0004 CR3: 000000001896a000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
percpu_ref_exit+0x3b/0x140 lib/percpu-refcount.c:134
io_ring_ctx_free fs/io_uring.c:8419 [inline]
io_ring_exit_work+0x599/0xcf0 fs/io_uring.c:8565
process_one_work+0x98d/0x1600 kernel/workqueue.c:2275
worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
kthread+0x3b1/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
next reply other threads:[~2021-03-15 11:59 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-15 11:58 syzbot [this message]
2021-03-15 12:18 ` [syzbot] WARNING in __percpu_ref_exit (2) Pavel Begunkov
[not found] ` <20210318083340.1900-1-hdanton@sina.com>
2021-03-18 14:28 ` Pavel Begunkov
2021-04-18 19:30 ` syzbot
2021-04-19 12:07 ` Pavel Begunkov
2021-04-19 15:02 ` syzbot
2021-09-13 9:22 ` syzbot
2021-09-16 7:59 ` Dmitry Vyukov
2021-09-16 13:17 ` Pavel Begunkov
2021-09-16 14:01 ` syzbot
2021-09-20 8:15 ` Dmitry Vyukov
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