From: syzbot <syzbot+d6218cb2fae0b2411e9d@syzkaller.appspotmail.com>
To: asml.silence@gmail.com, axboe@kernel.dk, hdanton@sina.com,
io-uring@vger.kernel.org, linux-kernel@vger.kernel.org,
ming.lei@redhat.com, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] WARNING in __percpu_ref_exit (2)
Date: Sun, 18 Apr 2021 12:30:12 -0700 [thread overview]
Message-ID: <000000000000ee3bbf05c0443da6@google.com> (raw)
In-Reply-To: <0000000000006e9e0705bd91f762@google.com>
syzbot has found a reproducer for the following issue on:
HEAD commit: c98ff1d0 Merge tag 'scsi-fixes' of git://git.kernel.org/pu..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=163d7229d00000
kernel config: https://syzkaller.appspot.com/x/.config?x=1c70e618af4c2e92
dashboard link: https://syzkaller.appspot.com/bug?extid=d6218cb2fae0b2411e9d
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=145cb2b6d00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=157b72b1d00000
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: 169 at lib/percpu-refcount.c:113 __percpu_ref_exit+0x98/0x100 lib/percpu-refcount.c:113
Modules linked in:
CPU: 1 PID: 169 Comm: kworker/u4:3 Not tainted 5.12.0-rc7-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 a8 4a ab fd <0f> 0b e8 a1 4a ab fd 48 89 ef e8 69 f0 d9 fd 48 89 da 48 b8 00 00
RSP: 0018:ffffc90001077b48 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88802d5ca000 RCX: 0000000000000000
RDX: ffff88801217a1c0 RSI: ffffffff83c7db28 RDI: ffff88801d58f010
RBP: 0000607f4607bcb8 R08: 0000000000000000 R09: ffffffff8fa9f977
R10: ffffffff83c7dac8 R11: 0000000000000009 R12: ffff88801d58f000
R13: 000000010002865e R14: ffff88801d58f000 R15: ffff88802d5ca8b0
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000044 CR3: 0000000015c02000 CR4: 00000000001506e0
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:8483 [inline]
io_ring_exit_work+0xa64/0x12d0 fs/io_uring.c:8620
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
next prev parent reply other threads:[~2021-04-18 19:30 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-15 11:58 [syzbot] WARNING in __percpu_ref_exit (2) syzbot
2021-03-15 12:18 ` Pavel Begunkov
[not found] ` <20210318083340.1900-1-hdanton@sina.com>
2021-03-18 14:28 ` Pavel Begunkov
2021-04-18 19:30 ` syzbot [this message]
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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