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From: Peter Zijlstra <peterz@infradead.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Hillf Danton <hdanton@sina.com>,
	syzbot <syzbot+f619f7c0a2a5f87694e6@syzkaller.appspotmail.com>,
	linux-kernel@vger.kernel.org, Oleg Nesterov <oleg@redhat.com>,
	syzkaller-bugs@googlegroups.com, Jiri Olsa <jolsa@redhat.com>
Subject: Re: [syzbot] possible deadlock in vm_mmap_pgoff
Date: Mon, 3 May 2021 17:55:16 +0200	[thread overview]
Message-ID: <YJAc5EnwL59DNojt@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20210428093018.70c3888b@gandalf.local.home>

On Wed, Apr 28, 2021 at 09:30:18AM -0400, Steven Rostedt wrote:

> > Break the lock chain by asking kworker to destroy perf event.
> > Thoughts other than workqueue are appreciated.
> 
> I think this could cause a problem with the delay.
> 
> This is called from event->destroy()
> 
> 
> 	if (event->destroy)
> 		event->destroy(event);
> 	module_put(pmu->module);

The uprobe and tracepoint pmus will never be a module.

  reply	other threads:[~2021-05-03 15:55 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-27 15:18 syzbot
     [not found] ` <20210428061522.1841-1-hdanton@sina.com>
2021-04-28 13:30   ` Steven Rostedt
2021-05-03 15:55     ` Peter Zijlstra [this message]
2021-07-23 15:16 ` syzbot

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