linux-kernel - Re: [syzbot] kernel BUG in assfail

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Message-ID: <CANpmjNNH0woaJEzviEj5sfzeOyFXCcE4U-UwUcgjL97aU7LVxg@mail.gmail.com>
Date:   Thu, 24 Nov 2022 09:07:59 +0100
From:   Marco Elver <elver@...gle.com>
To:     Dave Chinner <david@...morbit.com>
Cc:     syzbot <syzbot+1d8c82e66f2e76b6b427@...kaller.appspotmail.com>,
        djwong@...nel.org, linux-kernel@...r.kernel.org,
        linux-xfs@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] kernel BUG in assfail

#syz invalid

On Tue, 22 Nov 2022 at 05:35, Dave Chinner <david@...morbit.com> wrote:
...
> Turn off CONFIG_XFS_DEBUG, and this failure will return
> -EFSCORRUPTED as expected because syzbot fed it a corrupt log. THe
> mount will simply fail as you'd expect given the malicious
> corruption that syzbot has performed.
>
> If syzbot is going to maliciously corrupt XFS filesytsems and then
> try to abuse them, then syzbot has two choices. Either:
>
> 1. do not enable CONFIG_XFS_DEBUG; or

We've disabled CONFIG_XFS_DEBUG - reports like this should no longer be sent.

Thanks,
-- Marco