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From: Waiman Long <longman@redhat.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Dmitry Vyukov <dvyukov@google.com>,
	syzbot <syzbot+a9fb1457d720a55d6dc5@syzkaller.appspotmail.com>,
	Alexey Dobriyan <adobriyan@gmail.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	allison@lohutok.net, areber@redhat.com,
	aubrey.li@linux.intel.com, Andrei Vagin <avagin@gmail.com>,
	Bruce Fields <bfields@fieldses.org>,
	Christian Brauner <christian@brauner.io>,
	cyphar@cyphar.com, "Eric W. Biederman" <ebiederm@xmission.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	guro@fb.com, Jeff Layton <jlayton@kernel.org>,
	Joel Fernandes <joel@joelfernandes.org>,
	Kees Cook <keescook@chromium.org>,
	linmiaohe@huawei.com,
	linux-fsdevel <linux-fsdevel@vger.kernel.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Michal Hocko <mhocko@suse.com>, Ingo Molnar <mingo@kernel.org>,
	Oleg Nesterov <oleg@redhat.com>,
	sargun@sargun.me,
	syzkaller-bugs <syzkaller-bugs@googlegroups.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Al Viro <viro@zeniv.linux.org.uk>,
	Boqun Feng <boqun.feng@gmail.com>
Subject: Re: possible deadlock in send_sigio
Date: Thu, 11 Jun 2020 12:09:59 -0400	[thread overview]
Message-ID: <b405aca6-a3b2-cf11-a482-2b4af1e548bd@redhat.com> (raw)
In-Reply-To: <20200611142214.GI2531@hirez.programming.kicks-ass.net>

On 6/11/20 10:22 AM, Peter Zijlstra wrote:
> On Thu, Jun 11, 2020 at 09:51:29AM -0400, Waiman Long wrote:
>
>> There was an old lockdep patch that I think may address the issue, but was
>> not merged at the time. I will need to dig it out and see if it can be
>> adapted to work in the current kernel. It may take some time.
> Boqun was working on that; I can't remember what happened, but ISTR it
> was shaping up nice.
>
Yes, I am talking about Boqun's patch. However, I think he had moved to 
another company and so may not be able to actively work on that again.

Cheers,
Longman


  reply	other threads:[~2020-06-11 16:10 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-04  5:55 possible deadlock in send_sigio syzbot
2020-06-11  2:32 ` Waiman Long
2020-06-11  7:43   ` Dmitry Vyukov
2020-06-11 13:51     ` Waiman Long
2020-06-11 14:22       ` Peter Zijlstra
2020-06-11 16:09         ` Waiman Long [this message]
2020-06-11 23:55           ` Boqun Feng
2020-06-12  1:55             ` Waiman Long
2020-06-12  7:01             ` Boqun Feng
2020-06-15 16:37               ` Waiman Long
2020-06-15 16:49               ` Matthew Wilcox
2020-06-15 17:13                 ` Waiman Long
2020-06-15 20:40                   ` Matthew Wilcox
2020-06-16  0:13                     ` Boqun Feng
2020-06-16  0:31                       ` Waiman Long
2020-06-11 16:07   ` Eric W. Biederman

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