Re: [syzbot] kernel BUG in ext4_mb_use_inode_pa

[Dmitry Vyukov]

On Fri, 4 Nov 2022 at 16:15, syzbot
<syzbot+4998f18bcd5fc7e40c8b@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit 4bb26f2885ac6930984ee451b952c5a6042f2c0e
> Author: Jan Kara <jack@xxxxxxx>
> Date:   Wed Jul 27 15:57:53 2022 +0000
>
>     ext4: avoid crash when inline data creation follows DIO write
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14eb2fb6880000
> start commit:   4fe89d07dcc2 Linux 6.0
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=48b99eaecc2b324f
> dashboard link: https://syzkaller.appspot.com/bug?extid=4998f18bcd5fc7e40c8b
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=119bc15c880000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13d97bc0880000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: ext4: avoid crash when inline data creation follows DIO write
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection


Looks reasonable based on subsystem and the patch:

#syz fix: ext4: avoid crash when inline data creation follows DIO write