From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758057AbdCUSU4 (ORCPT ); Tue, 21 Mar 2017 14:20:56 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56872 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757715AbdCUSUy (ORCPT ); Tue, 21 Mar 2017 14:20:54 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 8596D41A23 Authentication-Results: ext-mx06.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx06.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=jpoimboe@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 8596D41A23 Date: Tue, 21 Mar 2017 13:14:01 -0500 From: Josh Poimboeuf To: Dave Jones Cc: Linux Kernel Subject: Re: 4.11rc3 unwinder spew. Message-ID: <20170321181401.bn6grjwb3cfegnpd@treble> References: <20170320221325.3ydjc2675upos43m@codemonkey.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20170320221325.3ydjc2675upos43m@codemonkey.org.uk> User-Agent: Mutt/1.6.0.1 (2016-04-01) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Tue, 21 Mar 2017 18:14:04 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Mar 20, 2017 at 06:13:25PM -0400, Dave Jones wrote: > I just got this while running a backup.. > > Dave > > WARNING: kernel stack frame pointer at ffffc90000fe7ff0 in rsync:1157 has bad value (null) > unwind stack type:0 next_sp: (null) mask:2 graph_idx:0 > ffffc90000fe7f98: ffffc90000fe7ff0 (0xffffc90000fe7ff0) > ffffc90000fe7fa0: ffffffffb7000f56 (trace_hardirqs_off_thunk+0x1a/0x1c) > ffffc90000fe7fa8: 0000000000000246 (0x246) > ffffc90000fe7fb0: 0000000000000000 ... > ffffc90000fe7fc0: 00007ffe3af639bc (0x7ffe3af639bc) > ffffc90000fe7fc8: 0000000000000006 (0x6) > ffffc90000fe7fd0: 00007f80af433fc5 (0x7f80af433fc5) > ffffc90000fe7fd8: 00007ffe3af638e0 (0x7ffe3af638e0) > ffffc90000fe7fe0: 00007ffe3af638e0 (0x7ffe3af638e0) > ffffc90000fe7fe8: 00007ffe3af63970 (0x7ffe3af63970) > ffffc90000fe7ff0: 0000000000000000 ... > ffffc90000fe7ff8: ffffffffb7b74b9a (entry_SYSCALL_64_after_swapgs+0x17/0x4f) Thanks, this is a known issue with the unwinder getting confused about interrupts hitting in early entry code. I'm working on a patch to fix it. -- Josh