linux-kernel - Re: [syzbot] [f2fs?] possible deadlock in f2fs_add_inline

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Message-ID: <8680b259-528b-32a9-73ee-ce6a6406f13d@kernel.org>
Date:   Fri, 25 Aug 2023 09:08:28 +0800
From:   Chao Yu <chao@...nel.org>
To:     syzbot <syzbot+a4976ce949df66b1ddf1@...kaller.appspotmail.com>,
        hdanton@...a.com, jaegeuk@...nel.org,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [f2fs?] possible deadlock in f2fs_add_inline_entry

On 2023/8/24 23:55, syzbot wrote:
> syzbot has bisected this issue to:
> 
> commit 5eda1ad1aaffdfebdecf7a164e586060a210f74f
> Author: Jaegeuk Kim <jaegeuk@...nel.org>
> Date:   Wed Jun 28 08:00:56 2023 +0000
> 
>      f2fs: fix deadlock in i_xattr_sem and inode page lock
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=167691b7a80000
> start commit:   cacc6e22932f tpm: Add a helper for checking hwrng enabled
> git tree:       upstream
> final oops:     https://syzkaller.appspot.com/x/report.txt?x=157691b7a80000
> console output: https://syzkaller.appspot.com/x/log.txt?x=117691b7a80000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=171b698bc2e613cf
> dashboard link: https://syzkaller.appspot.com/bug?extid=a4976ce949df66b1ddf1
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=103c6bb3a80000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17bb51c7a80000
> 
> Reported-by: syzbot+a4976ce949df66b1ddf1@...kaller.appspotmail.com
> Fixes: 5eda1ad1aaff ("f2fs: fix deadlock in i_xattr_sem and inode page lock")

#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git dev

> 
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection