Re: [syzbot] [ext4?] general protection fault in utf8nlookup

[Jan Kara]

On Mon 12-02-24 16:24:03, 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=17547fd4180000
> start commit:   e42bebf6db29 Merge tag 'efi-fixes-for-v6.6-1' of git://git..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=df91a3034fe3f122
> dashboard link: https://syzkaller.appspot.com/bug?extid=9cf75dc581fb4307d6dd
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1374a174680000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12b12928680000
> 
> If the result looks correct, please mark the issue as fixed by replying with:

The reproducer definitely does weird stuff like mmapping the loop device.
So makes sense:

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

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