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

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Message-ID: <CAFj5m9+LOn130frv+bVuzLOc8a72xnXi-u9WENJdkT0hFOH+tQ@mail.gmail.com>
Date: Tue, 10 Dec 2024 19:17:52 +0800
From: Ming Lei <ming.lei@...hat.com>
To: Hillf Danton <hdanton@...a.com>
Cc: syzbot <syzbot+5218c85078236fc46227@...kaller.appspotmail.com>, 
	boqun.feng@...il.com, linux-block@...r.kernel.org, 
	linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com, 
	Ming Lei <ming.lei@...hat.com>
Subject: Re: [syzbot] [block?] possible deadlock in blk_mq_submit_bio

On Tue, Dec 10, 2024 at 6:45 PM Hillf Danton <hdanton@...a.com> wrote:
>
> On Mon, 09 Dec 2024 11:19:17 -0800
> > syzbot has found a reproducer for the following issue on:
> >
> > HEAD commit:    fac04efc5c79 Linux 6.13-rc2
> > git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
> > syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=147528f8580000
>
> #syz test: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git   for-6.14/block

This one looks one real deadlock risk, similar with the following one:

https://lore.kernel.org/linux-block/Z0hkFoFsW5Xv8iKw@fedora/

I will take a look when I get time.

Thanks,