From: Ming Lei <tom.leiming@gmail.com>
To: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: Jens Axboe <axboe@kernel.dk>,
Bart Van Assche <bvanassche@acm.org>,
Christoph Hellwig <hch@lst.de>,
Damien Le Moal <dlemoal@kernel.org>,
linux-block <linux-block@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-btrfs@vger.kernel.org, David Sterba <dsterba@suse.com>,
linux-fsdevel@vger.kernel.org,
Christian Brauner <brauner@kernel.org>
Subject: Re: [PATCH v3] loop: Fix NULL pointer dereference in lo_rw_aio()
Date: Tue, 26 May 2026 22:00:49 -0500 [thread overview]
Message-ID: <ahZeYQ0cLE1i8TGs@fedora> (raw)
In-Reply-To: <d1b5a737-f0e3-4927-b762-430b37fbb2f9@I-love.SAKURA.ne.jp>
On Wed, May 27, 2026 at 10:35:56AM +0900, Tetsuo Handa wrote:
> On 2026/05/27 10:20, Ming Lei wrote:
> >> Of course we should try to figure out the root cause first, but how can we do?
> >
> > Definitely unexpected write IO(after umount & loop closed) from btrfs is more serious,
> > which may cause data loss, so CC btrfs list and maintainer.
>
> Why do you assume that the culprit is btrfs?
>
> https://syzkaller.appspot.com/bug?extid=bc273027d5643e48e5b3 indicated that
> this similar race is also happening with jfs.
I just didn't see the above report on jfs.
It doesn't change anything, the same question still stands: unexpected write IO is issued
or crosses umount & last closing of loop disk.
Thanks,
Ming
next prev parent reply other threads:[~2026-05-27 3:00 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-18 0:02 [syzbot] [block?] general protection fault in lo_rw_aio syzbot
2026-04-21 11:05 ` Tetsuo Handa
2026-05-11 11:43 ` [PATCH] loop: Fix NULL pointer dereference by synchronizing lo_release and loop_queue_rq Tetsuo Handa
2026-05-11 15:58 ` Bart Van Assche
2026-05-11 17:43 ` Tetsuo Handa
2026-05-12 11:46 ` Tetsuo Handa
2026-05-15 1:38 ` [PATCH v2] " Tetsuo Handa
2026-05-19 0:40 ` Andrew Morton
2026-05-19 9:27 ` Tetsuo Handa
2026-05-20 3:06 ` Ming Lei
2026-05-20 6:36 ` Tetsuo Handa
2026-05-20 7:49 ` Ming Lei
2026-05-20 8:20 ` Tetsuo Handa
2026-05-20 8:54 ` Ming Lei
2026-05-25 3:40 ` [PATCH v3] loop: Fix NULL pointer dereference in lo_rw_aio() Tetsuo Handa
2026-05-25 15:19 ` Ming Lei
2026-05-26 0:25 ` Tetsuo Handa
2026-05-27 1:20 ` Ming Lei
2026-05-27 1:35 ` Tetsuo Handa
2026-05-27 3:00 ` Ming Lei [this message]
2026-05-27 11:29 ` Tetsuo Handa
2026-05-27 18:11 ` Damien Le Moal
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