linux-kernel - Re: kernel BUG at fs/reiserfs/prints.c:LINE!

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Date:   Mon, 11 Jan 2021 12:15:31 +0100
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     syzbot <syzbot+1541a3226994c0781b29@...kaller.appspotmail.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>, Jan Kara <jack@...e.cz>,
        LKML <linux-kernel@...r.kernel.org>,
        reiserfs-devel@...r.kernel.org, rkovhaev@...il.com,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        zhengbin13@...wei.com
Subject: Re: kernel BUG at fs/reiserfs/prints.c:LINE!

On Fri, Jan 8, 2021 at 12:40 PM syzbot
<syzbot+1541a3226994c0781b29@...kaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit d24396c5290ba8ab04ba505176874c4e04a2d53c
> Author: Rustam Kovhaev <rkovhaev@...il.com>
> Date:   Sun Nov 1 14:09:58 2020 +0000
>
>     reiserfs: add check for an invalid ih_entry_count
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1731e8f7500000
> start commit:   521b619a Merge tag 'linux-kselftest-kunit-fixes-5.10-rc3' ..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=4e93228e2f17fb12
> dashboard link: https://syzkaller.appspot.com/bug?extid=1541a3226994c0781b29
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1446e7a8500000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15c56f5c500000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: reiserfs: add check for an invalid ih_entry_count
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

Looks realistic

#syz fix: reiserfs: add check for an invalid ih_entry_count