From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757065AbdKGQQf (ORCPT ); Tue, 7 Nov 2017 11:16:35 -0500 Received: from mail-io0-f193.google.com ([209.85.223.193]:43848 "EHLO mail-io0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755330AbdKGQQe (ORCPT ); Tue, 7 Nov 2017 11:16:34 -0500 X-Google-Smtp-Source: ABhQp+RS5mqUQsGoVwPhgK5K95dhM9ufW+rR/XDff1X1kKRNri7FJrXRAHGwJV1bKjdMEuh4dmZwvT8JhUJ6IlfrsD4= MIME-Version: 1.0 In-Reply-To: <20171031103812.lm5dgv26mybtgo6s@hirez.programming.kicks-ass.net> References: <001a113a67502e70f4055cc8dc92@google.com> <20171031083644.2svprv6ax7ask5lg@hirez.programming.kicks-ass.net> <20171031101853.xpfh72y643kdfhjs@hirez.programming.kicks-ass.net> <20171031103134.2cik6ycsaytptfhy@hirez.programming.kicks-ass.net> <20171031103812.lm5dgv26mybtgo6s@hirez.programming.kicks-ass.net> From: Dmitry Vyukov Date: Tue, 7 Nov 2017 17:16:13 +0100 Message-ID: Subject: Re: WARNING in get_pi_state To: Peter Zijlstra Cc: syzbot , dvhart@infradead.org, LKML , Ingo Molnar , syzkaller-bugs@googlegroups.com, Thomas Gleixner Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Oct 31, 2017 at 11:38 AM, Peter Zijlstra wrote: > On Tue, Oct 31, 2017 at 11:31:34AM +0100, Peter Zijlstra wrote: > >> And of course, now it went *splat*, lemme continue staring.. > > PEBKAC, turns out I was running the kernel without the patch in, and it > only took 3100 seconds to trigger the splat.. > > I am now actually running the kernel with the patch in, I'll leave the > machine running it for a few hours. Let's tell the bot about the fix, otherwise it will never report bugs in get_pi_state again: #syz fix: futex: Fix more put_pi_state() vs. exit_pi_state_list() races