From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753148AbeDURLO (ORCPT ); Sat, 21 Apr 2018 13:11:14 -0400 Received: from mail-pf0-f195.google.com ([209.85.192.195]:42792 "EHLO mail-pf0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752911AbeDURLM (ORCPT ); Sat, 21 Apr 2018 13:11:12 -0400 X-Google-Smtp-Source: AIpwx4/DoH4gMhRHEBd3xkNF1ZQlFMt5jvAVjgVn9RHddNEm+sNsxbI4O6Wfv9kXO0hEvV1rn4D8fQ== Date: Sat, 21 Apr 2018 10:12:25 -0700 From: Eric Biggers To: Dmitry Vyukov Cc: Peter Zijlstra , Steven Rostedt , syzbot , LKML , Ingo Molnar , syzkaller-bugs@googlegroups.com Subject: Re: possible deadlock in perf_trace_destroy (2) Message-ID: <20180421171225.GA1098@sol.localdomain> References: <001a114aa95c553065055d6307e2@google.com> <001a1141f35af49ace056363ab69@google.com> <20180122172013.01841063@gandalf.local.home> <20180122231934.GH2228@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.5 (2018-04-13) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 23, 2018 at 08:37:49AM +0100, 'Dmitry Vyukov' via syzkaller-bugs wrote: > On Tue, Jan 23, 2018 at 12:19 AM, Peter Zijlstra wrote: > > On Mon, Jan 22, 2018 at 05:20:13PM -0500, Steven Rostedt wrote: > >> > >> Peter, > >> > >> Isn't this the same as what you mentioned (and had a hack patch for) > >> before? > >> > >> http://lkml.kernel.org/r/20180109133651.GB2369@hirez.programming.kicks-ass.net > >> > > > > Looks like it. Just haven't managed to get those patches merged. I'll > > try and get that sorted tomorrow. Thanks for the reminder. > No longer occurring, fix was commit 82d94856fa22: #syz fix: perf/core: Fix lock inversion between perf,trace,cpuhp - Eric