linux-kernel - Re: [syzbot] [ext4?] possible deadlock in ext4

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Message-ID: <20230514163907-mutt-send-email-mst@kernel.org>
Date:   Sun, 14 May 2023 16:39:36 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     syzbot <syzbot+cbb68193bdb95af4340a@...kaller.appspotmail.com>
Cc:     adilger.kernel@...ger.ca, elic@...dia.com, jasowang@...hat.com,
        linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, parav@...dia.com,
        syzkaller-bugs@...glegroups.com, tytso@....edu
Subject: Re: [syzbot] [ext4?] possible deadlock in ext4_setattr

On Sun, May 14, 2023 at 12:24:32PM -0700, syzbot wrote:
> syzbot has bisected this issue to:
> 
> commit a3c06ae158dd6fa8336157c31d9234689d068d02
> Author: Parav Pandit <parav@...dia.com>
> Date:   Tue Jan 5 10:32:03 2021 +0000
> 
>     vdpa_sim_net: Add support for user supported devices
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16e372c6280000
> start commit:   e922ba281a8d Add linux-next specific files for 20230512
> git tree:       linux-next
> final oops:     https://syzkaller.appspot.com/x/report.txt?x=15e372c6280000
> console output: https://syzkaller.appspot.com/x/log.txt?x=11e372c6280000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=17a4c2d44484b62f
> dashboard link: https://syzkaller.appspot.com/bug?extid=cbb68193bdb95af4340a
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=172a21c6280000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16b67fc6280000
> 
> Reported-by: syzbot+cbb68193bdb95af4340a@...kaller.appspotmail.com
> Fixes: a3c06ae158dd ("vdpa_sim_net: Add support for user supported devices")
> 
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

I don't see how this can be related, I don't think the test setup uses
vdpa sim at all.

-- 
MST