linux-kernel - Re: [syzbot] [f2fs?] WARNING: lock held when returning to user space in f2fs_write_single_data

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Date:   Thu, 4 May 2023 15:53:11 +0200
From:   Aleksandr Nogikh <nogikh@...gle.com>
To:     Chao Yu <chao@...nel.org>
Cc:     syzbot <syzbot+eb6201248f684e99b9f8@...kaller.appspotmail.com>,
        syzkaller-bugs@...glegroups.com, jaegeuk@...nel.org,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: [syzbot] [f2fs?] WARNING: lock held when returning to user space
 in f2fs_write_single_data_page

On Thu, May 4, 2023 at 3:48 PM Chao Yu <chao@...nel.org> wrote:
>
> Hi,
>
> On 2023/5/4 21:31, syzbot wrote:
> > Hello,
> >
> > syzbot has tested the proposed patch but the reproducer is still triggering an issue:
>
> It said the reproducer is still triggering an issue, however, there is
> no error output from the test.
>
> Could you please help to check whether such status is normal or not, or
> am I missing something?

The status means that syzbot has not received a single byte from the
VM for 5 minutes in a row, i.e. the kernel likely just hung.

-- 
Aleksandr

>
> Thanks,
>
> > no output from test machine
> >
> >
> >
> > Tested on:
> >
> > commit:         2adb872d f2fs: fix potential deadlock due to unpaired ..
> > git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git dev-test
> > console output: https://syzkaller.appspot.com/x/log.txt?x=114b5338280000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=86e4eb913e90d4b2
> > dashboard link: https://syzkaller.appspot.com/bug?extid=eb6201248f684e99b9f8
> > compiler:       Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
> >
> > Note: no patches were applied.
>
> --
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