lkml.org 
[lkml]   [2021]   [Aug]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [syzbot] WARNING in io_ring_exit_work
From
syzbot has found a reproducer for the following issue on:

HEAD commit: 8d4b477da1a8 Add linux-next specific files for 20210730
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1478e4fa300000
kernel config: https://syzkaller.appspot.com/x/.config?x=4adf4987f875c210
dashboard link: https://syzkaller.appspot.com/bug?extid=00e15cda746c5bc70e24
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15d5cd96300000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1798471e300000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+00e15cda746c5bc70e24@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 1182 at fs/io_uring.c:8802 io_ring_exit_work+0x24e/0x1600 fs/io_uring.c:8802
Modules linked in:
CPU: 1 PID: 1182 Comm: kworker/u4:5 Not tainted 5.14.0-rc3-next-20210730-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:io_ring_exit_work+0x24e/0x1600 fs/io_uring.c:8802
Code: 30 11 00 00 48 8b 05 c1 dc 80 09 31 ff 48 8b 2c 24 48 29 c5 48 89 ee e8 c0 a8 95 ff 48 85 ed 0f 89 a8 fe ff ff e8 52 a3 95 ff <0f> 0b e9 9c fe ff ff e8 46 a3 95 ff 48 c7 c2 c0 25 2a 90 48 c7 c6
RSP: 0018:ffffc90004ed7b98 EFLAGS: 00010293
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff88801c921c80 RSI: ffffffff81e014de RDI: 0000000000000003
RBP: ffffffffffffffff R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff81e014d0 R11: 0000000000000000 R12: fffffbfff16c1e30
R13: ffffed100e3f4894 R14: ffff888071fa4920 R15: ffff888071fa4000
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000488 CR3: 00000001c82cf000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

\
 
 \ /
  Last update: 2021-08-06 09:03    [W:0.098 / U:0.568 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site