Re: [syzbot] [ext4?] kernel BUG in ext4_enable_quotas

[Jan Kara]

On Sat 10-02-24 06:59:05, syzbot wrote:
> syzbot suspects this issue was fixed by commit:
> 
> commit 6f861765464f43a71462d52026fbddfc858239a5
> Author: Jan Kara <jack@xxxxxxx>
> Date:   Wed Nov 1 17:43:10 2023 +0000
> 
>     fs: Block writes to mounted block devices
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=147e5b20180000
> start commit:   89bf6209cad6 Merge tag 'devicetree-fixes-for-6.5-2' of git..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=1b32f62c755c3a9c
> dashboard link: https://syzkaller.appspot.com/bug?extid=693985588d7a5e439483
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11ba1fefa80000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1636640fa80000
> 
> If the result looks correct, please mark the issue as fixed by replying with:
 
The syzbot reproducer seems to mess with multiple ext4 mounts stacked on
one another and the loop device as well. Quite likely it managed to corrupt
the mounted filesystem. So:

#syz fix: fs: Block writes to mounted block devices

								Honza
-- 
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR