From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752064Ab3KOSnC (ORCPT ); Fri, 15 Nov 2013 13:43:02 -0500 Received: from mail.tellerulam.com ([213.198.94.130]:48496 "EHLO nitrogen.vapor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751299Ab3KOSm5 (ORCPT ); Fri, 15 Nov 2013 13:42:57 -0500 X-Greylist: delayed 501 seconds by postgrey-1.27 at vger.kernel.org; Fri, 15 Nov 2013 13:42:56 EST Date: Fri, 15 Nov 2013 19:34:22 +0100 From: Ian Kumlien To: linux-kernel@vger.kernel.org Subject: [OOPS][3.12] BUG: unable to handle kernel NULL pointer dereference at 0000000c Message-ID: <20131115183422.GA9417@pomac.netswarm.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.22 (2013-10-16) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, After a lot of wondering i finally tracked down the bug that was hitting me since 3.12-rc7. Since this is a firewall I haven't actually noticed it all the time. But when i saw that it rebooted too often, i enabled netconsole and this is the output: BUG: unable to handle kernel NULL pointer dereference at 0000000c IP: [] _decode_session6+0x8b/0x370 *pde = 00000000 Oops: 0000 [#1] SMP Modules linked in: netconsole tun CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.12.0 #55 Hardware name: MICRO-STAR INTERNATIONAL CO., LTD MS-9632/MS-9632, BIOS 6.00 PG 05/16/2007 task: c1b64880 ti: f600a000 task.ti: c1b5a000 EIP: 0060:[] EFLAGS: 00210202 CPU: 0 EIP is at _decode_session6+0x8b/0x370 EAX: 00000000 EBX: f2c42c00 ECX: 00000001 EDX: e351a0a2 ESI: 00000000 EDI: f600be70 EBP: f600be34 ESP: f600bdfc DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 CR0: 8005003b CR2: 0000000c CR3: 235e8000 CR4: 000007d0 Stack: f600be30 00282c00 00000001 c1bb24e0 f63f8000 c1baa780 f2c42c00 c17d653f f2c42c00 c1807178 00000001 00000000 e3791f00 e3791f00 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Call Trace: [] ? __xfrm_decode_session+0x1f/0x30 [] ? icmpv6_route_lookup+0xa8/0x170 [] ? icmp6_send+0x453/0x6e0 [] ? ip_local_deliver_finish+0x7c/0x1f0 [] ? ip_rcv_finish+0x310/0x310 [] ? ip_rcv_finish+0x113/0x310 [] ? icmpv6_route_lookup+0x170/0x170 [] ? icmpv6_send+0x24/0x30 [] ? ip6_expire_frag_queue+0x16f/0x180 [] ? nf_ct_net_init+0x60/0x60 [] ? call_timer_fn.isra.27+0x1c/0x80 [] ? e1000e_poll+0x13b/0x2e0 [] ? nf_ct_net_init+0x60/0x60 [] ? run_timer_softirq+0x134/0x1d0 [] ? __do_softirq+0xa5/0x160 [] ? remote_softirq_cpu_notify+0xa0/0xa0 [] ? irq_exit+0x66/0x90 [] ? smp_apic_timer_interrupt+0x35/0x50 [] ? apic_timer_interrupt+0x2d/0x34 [] ? default_idle+0x2/0x10 [] ? arch_cpu_idle+0x16/0x20 [] ? cpu_startup_entry+0x49/0x130 [] ? start_kernel+0x29e/0x2a3 [] ? repair_env_string+0x4d/0x4d Code: 00 00 f3 ab 74 08 66 c7 07 00 00 83 c7 02 83 e6 01 74 03 c6 07 00 8b 83 90 00 00 00 8b 4c 24 08 89 45 08 8b 43 48 83 e0 fe 85 c9 <8b> 40 0c 8b 80 88 00 00 00 89 45 00 0f 84 1b 01 00 00 8b 42 08 EIP: [] _decode_session6+0x8b/0x370 SS:ESP 0068:f600bdfc CR2: 000000000000000c ---[ end trace 0cbf7fb6e6aa1f45 ]--- Kernel panic - not syncing: Fatal exception in interrupt --- Any clue besides just disabling ipv6? ;)