From: Ming Lei <ming.lei@redhat.com>
To: syzbot <syzbot+934ebb67352c8a490bf3@syzkaller.appspotmail.com>
Cc: axboe@kernel.dk, cgroups@vger.kernel.org,
linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com, tj@kernel.org
Subject: Re: [syzbot] possible deadlock in throtl_pending_timer_fn
Date: Wed, 30 Mar 2022 11:01:40 +0800 [thread overview]
Message-ID: <YkPIFKn0osBGOgma@T590> (raw)
In-Reply-To: <0000000000009518f205db66a47a@google.com>
On Tue, Mar 29, 2022 at 07:52:57PM -0700, syzbot wrote:
> > On Wed, Mar 30, 2022 at 5:23 AM syzbot
> > <syzbot+934ebb67352c8a490bf3@syzkaller.appspotmail.com> wrote:
> >>
> >> Hello,
> >>
> >> syzbot found the following issue on:
> >>
> >> HEAD commit: cb7cbaae7fd9 Merge tag 'drm-next-2022-03-25' of git://anon..
> >> git tree: upstream
> >> console output: https://syzkaller.appspot.com/x/log.txt?x=17ef8b43700000
> >> kernel config: https://syzkaller.appspot.com/x/.config?x=7094767cefc58fb9
> >> dashboard link: https://syzkaller.appspot.com/bug?extid=934ebb67352c8a490bf3
> >> compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> >>
> >> Unfortunately, I don't have any reproducer for this issue yet.
> >>
> >> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> >> Reported-by: syzbot+934ebb67352c8a490bf3@syzkaller.appspotmail.com
> >
> > #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git
>
> This crash does not have a reproducer. I cannot test it.
This one is triggered in case of memory allocation failure, especially blkg_free()
is called from blkg_alloc() directly. That is why it is hard to reproduce, and it
is one old issue.
Thanks,
Ming
next prev parent reply other threads:[~2022-03-30 3:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-29 21:23 [syzbot] possible deadlock in throtl_pending_timer_fn syzbot
2022-03-30 2:52 ` Ming Lei
2022-03-30 2:52 ` syzbot
2022-03-30 3:01 ` Ming Lei [this message]
2022-07-29 23:32 ` syzbot
2022-07-30 3:25 ` syzbot
2022-07-30 11:17 ` Ming Lei
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