public inbox for [email protected]
 help / color / mirror / Atom feed
From: syzbot <[email protected]>
To: [email protected], [email protected],
	[email protected], [email protected],
	[email protected], [email protected]
Subject: WARNING in create_io_worker
Date: Wed, 02 Dec 2020 13:31:23 -0800	[thread overview]
Message-ID: <[email protected]> (raw)

Hello,

syzbot found the following issue on:

HEAD commit:    c84e1efa Merge tag 'asm-generic-fixes-5.10-2' of git://git..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14a43395500000
kernel config:  https://syzkaller.appspot.com/x/.config?x=6d1e98d0b97781e4
dashboard link: https://syzkaller.appspot.com/bug?extid=fa13b30255540662f825
compiler:       gcc (GCC) 10.1.0-syz 20200507

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: [email protected]

------------[ cut here ]------------
WARNING: CPU: 3 PID: 10595 at include/linux/cpumask.h:137 rcu_read_unlock include/linux/rcupdate.h:696 [inline]
WARNING: CPU: 3 PID: 10595 at include/linux/cpumask.h:137 ttwu_stat kernel/sched/core.c:2441 [inline]
WARNING: CPU: 3 PID: 10595 at include/linux/cpumask.h:137 try_to_wake_up+0xef6/0x1330 kernel/sched/core.c:2984
Modules linked in:
CPU: 3 PID: 10595 Comm: io_wq_manager Not tainted 5.10.0-rc5-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
RIP: 0010:tryqemu-system-x86_64: warning: guest updated active QH
Code: 80 3d 93 2a 8c 0b 00 0f 84 f1 00 00 00 e8 82 80 10 00 48 c7 c6 d9 6d 4c 81 48 c7 c7 e0 77 33 8b e8 0f b7 09 00 e9 15 f9 ff ff <0f> 0b e9 65 f4 ff ff 4c 89 ff 48 89 4c 24 08 e8 b6 51 ff ff 48 8b
RSP: 0018:ffffc90004b4fd50 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: 1ffff92000969faf RCX: ffff88806dc24778
RDX: 1ffff1100db848ee RSI: ffffffff83b63fcb RDI: 0000000000000006
RBP: ffff88806dc24400 R08: ffff88806dc24410 R09: ffffffff8cecc98f
R10: 0000000000000040 R11: 0000000000000000 R12: 0000000000000202
R13: ffff88806dc24c38 R14: 0000000000000008 R15: ffff88806dc24770
FS:  0000000000000000(0000) GS:ffff88802cd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000339da98 CR3: 0000000020a7e000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 create_io_worker+0x590/0x8d0 fs/io-wq.c:720
 io_wq_manager+0x16b/0xb80 fs/io-wq.c:785
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296


---
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 [email protected].

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

                 reply	other threads:[~2020-12-02 21:32 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    [email protected] \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox