From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755122Ab3BUX4J (ORCPT ); Thu, 21 Feb 2013 18:56:09 -0500 Received: from www.linutronix.de ([62.245.132.108]:53959 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754340Ab3BUX4H (ORCPT ); Thu, 21 Feb 2013 18:56:07 -0500 Date: Fri, 22 Feb 2013 00:56:01 +0100 (CET) From: Thomas Gleixner To: LKML cc: "Rafael J. Wysocki" , Yinghai Lu , Toshi Kani Subject: [BUG bisected]: apei_hest_parse explosion Message-ID: User-Agent: Alpine 2.02 (LFD 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Just booted linus head on one of my old kvm based testing systems and got the following splat: [ 0.531910] BUG: unable to handle kernel NULL pointer dereference at 0000000000000024 [ 0.532173] IP: [] apei_hest_parse+0xd2/0xf0 [ 0.532173] PGD 0 [ 0.532173] Oops: 0000 [#1] PREEMPT SMP [ 0.532173] Modules linked in: [ 0.532173] CPU 3 [ 0.532173] Pid: 1, comm: swapper/0 Not tainted 3.8.0+ #195 Bochs Bochs [ 0.532173] RIP: 0010:[] [] apei_hest_parse+0xd2/0xf0 [ 0.532173] RSP: 0000:ffff88021685be78 EFLAGS: 00010206 [ 0.532173] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 0.532173] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000028 [ 0.532173] RBP: ffff88021685be98 R08: 00000000804efb06 R09: 0000000000000000 [ 0.532173] R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff81af3d40 [ 0.532173] R13: ffffffff812bcb23 R14: 0000000000000000 R15: 0000000000000000 [ 0.532173] FS: 0000000000000000(0000) GS:ffff88021fcc0000(0000) knlGS:0000000000000000 [ 0.532173] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.532173] CR2: 0000000000000024 CR3: 0000000001a0c000 CR4: 00000000000406a0 [ 0.532173] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 0.532173] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 0.532173] Process swapper/0 (pid: 1, threadinfo ffff88021685a000, task ffff8802168c0000) [ 0.532173] Stack: [ 0.532173] 00000000fffffffa ffffffff81af3d40 0000000000000000 000000001fb3f55a [ 0.532173] ffff88021685bea8 ffffffff812bcbe4 ffff88021685bec8 ffffffff81af3d5c [ 0.532173] 0000000000000030 0000000000000030 ffff88021685bef8 ffffffff8100023b [ 0.532173] Call Trace: [ 0.532173] [] ? pcie_portdrv_init+0x7a/0x7a [ 0.532173] [] aer_acpi_firmware_first+0x20/0x30 [ 0.532173] [] aer_service_init+0x1c/0x35 [ 0.532173] [] do_one_initcall+0x57/0x13c [ 0.532173] [] kernel_init_freeable+0x142/0x1d1 [ 0.532173] [] ? loglevel+0x31/0x31 [ 0.532173] [] ? rest_init+0xc3/0xc3 [ 0.532173] [] kernel_init+0xe/0xd6 [ 0.532173] [] ret_from_fork+0x7c/0xb0 [ 0.532173] [] ? rest_init+0xc3/0xc3 [ 0.532173] Code: 14 0f b7 77 02 31 c0 48 c7 c7 65 c1 83 81 e8 35 1a 2c 00 eb 23 4c 89 f6 41 ff d5 85 c0 75 1e 4c 89 e7 ff c3 48 8b 05 a6 5b 7c 00 <3b> 58 24 0f 82 5a ff ff ff 31 c0 eb 05 b8 ea ff ff ff 5b 41 5c git bisect identified the following commit: commit 92ef2a25c763338905dce8344a0584606f842920 Author: Rafael J. Wysocki Date: Fri Dec 21 00:36:40 2012 +0100 ACPI: Change the ordering of PCI root bridge driver registrarion A revert is impossible w/o major surgery, so I'm going to bed and let the involved folks think about it. Thanks, tglx