linux-kernel - Re: [syzbot] [ntfs3?] WARNING in walk

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Message-ID: <CANp29Y7LG7szcmLzfjNAZRpitQwn6Yh-h7zPk+demObAwuxwZw@mail.gmail.com>
Date:   Thu, 13 Jul 2023 10:31:55 +0200
From:   Aleksandr Nogikh <nogikh@...gle.com>
To:     syzbot <syzbot+eba014ac93ef29f83dc8@...kaller.appspotmail.com>
Cc:     akpm@...ux-foundation.org,
        almaz.alexandrovich@...agon-software.com, davem@...emloft.net,
        hughd@...gle.com, jiri@...dia.com, kuba@...nel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, ntfs3@...ts.linux.dev,
        syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk
Subject: Re: [syzbot] [ntfs3?] WARNING in walk_component

On Thu, Jul 13, 2023 at 4:31 AM syzbot
<syzbot+eba014ac93ef29f83dc8@...kaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit d772781964415c63759572b917e21c4f7ec08d9f
> Author: Jakub Kicinski <kuba@...nel.org>
> Date:   Fri Jan 6 06:33:54 2023 +0000
>
>     devlink: bump the instance index directly when iterating
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12801432a80000
> start commit:   f3e8416619ce Merge tag 'soc-fixes-6.1-5' of git://git.kern..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=b83f3e90d74765ea
> dashboard link: https://syzkaller.appspot.com/bug?extid=eba014ac93ef29f83dc8
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=117d216b880000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: devlink: bump the instance index directly when iterating

That commit fixes a second problem triggerable by the same reproducer
-- "INFO: rcu detected stall", but it is not related to the original
"WARNING in walk_component" crash.

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