Network traffic input is via two PPP devices, output is via a TEQL device with both PPP devices attached. It's possible that a PPP device could have gone down while this packet was being logged. icmp.o attached: 109a: 8b 9b 60 01 00 00 mov 0x160(%ebx),%ebx 10a0: 83 c4 10 add $0x10,%esp 10a3: 85 db test %ebx,%ebx 10a5: 74 07 je 10ae * 10a7: f0 ff 83 dc 00 00 00 lock incl 0xdc(%ebx) 10ae: b9 ae 10 00 00 mov $0x10ae,%ecx 10af: R_386_32 .text 10b3: ba 01 00 00 00 mov $0x1,%edx 10b8: b8 00 00 00 00 mov $0x0,%eax 10b9: R_386_32 rcu_lock_map 10bd: e8 fc ff ff ff call 10be [19258502.086131] BUG: unable to handle kernel paging request at 676e7543 [19258502.087007] IP: [] icmpv6_send+0x5c3/0x6e2 [19258502.087007] *pdpt = 0000000002734001 *pde = 0000000000000000 [19258502.087007] Oops: 0002 [#1] PREEMPT SMP [19258502.087007] last sysfs file: /sys/devices/platform/it87.552/cpu0_vid [19258502.087007] Modules linked in: sr_mod cdrom xt_NOTRACK iptable_raw ftdi_sio sch_teql crc32c iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi pppoe pppox ppp_synctty act_mirred sch_ingress sch_sfq cls_] [19258502.087007] [19258502.087007] Pid: 3, comm: ksoftirqd/0 Tainted: G W 2.6.35.4-git+ #git+ GA-MA69VM-S2/GA-MA69VM-S2 [19258502.087007] EIP: 0060:[] EFLAGS: 00010202 CPU: 0 [19258502.087007] EIP is at icmpv6_send+0x5c3/0x6e2 [19258502.087007] EAX: 00000000 EBX: 676e7467 ECX: 00000000 EDX: 00000001 [19258502.087007] ESI: f6fa8db4 EDI: 00000000 EBP: f7483c4c ESP: f7483b48 [19258502.087007] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 [19258502.087007] Process ksoftirqd/0 (pid: 3, ti=f7482000 task=f74800a0 task.ti=f7482000) [19258502.251703] Stack: [19258502.251703] f68d1e00 c067f614 f7483b58 c067f614 f7483b68 c0513fe0 b21c8fe7 b21c8fdd [19258502.251703] <0> f7483b88 c022e74d 00000046 0101fe2f f4d8004c 00000151 f6fa8ac0 f6fa8db4 [19258502.251703] <0> f4d8005c 00000000 00000040 f6fa8af0 00000000 00000000 00000000 10060120 [19258502.251703] Call Trace: [19258502.251703] [] ? _raw_spin_unlock_irqrestore+0x42/0x58 [19258502.251703] [] ? release_console_sem+0x197/0x1c4 [19258502.251703] [] ? reject_tg6+0x70/0x43f [ip6t_REJECT] [19258502.251703] [] ? ip6t_log_packet+0x15d/0x167 [ip6t_LOG] [19258502.251703] [] ? trace_hardirqs_on+0xb/0xd [19258502.251703] [] ? local_bh_enable_ip+0x97/0xad [19258502.251703] [] ? _raw_spin_unlock_bh+0x2f/0x32 [19258502.251703] [] ? ip6t_log_packet+0x15d/0x167 [ip6t_LOG] [19258502.251703] [] ? ipv6_find_hdr+0xf8/0x164 [ip6_tables] [19258502.251703] [] ? ip6t_do_table+0x4c8/0x53e [ip6_tables] [19258502.251703] [] ? ip6table_mangle_hook+0xf0/0x100 [ip6table_mangle] [19258502.251703] [] ? ip6table_filter_hook+0x18/0x20 [ip6table_filter] [19258502.251703] [] ? nf_iterate+0x2f/0x62 [19258502.251703] [] ? ip6_input_finish+0x0/0x3db [19258502.251703] [] ? nf_hook_slow+0x63/0xeb [19258502.251703] [] ? ip6_input_finish+0x0/0x3db [19258502.251703] [] ? ip6_input+0x33/0x47 [19258502.251703] [] ? ip6_input_finish+0x0/0x3db [19258502.251703] [] ? ip6_rcv_finish+0x8b/0x8e [19258502.251703] [] ? nf_ct_frag6_output+0x7c/0x95 [nf_conntrack_ipv6] [19258502.251703] [] ? ipv6_defrag+0x87/0x9f [nf_conntrack_ipv6] [19258502.251703] [] ? ip6_rcv_finish+0x0/0x8e [19258502.251703] [] ? nf_iterate+0x2f/0x62 [19258502.251703] [] ? ip6_rcv_finish+0x0/0x8e [19258502.251703] [] ? nf_hook_slow+0x63/0xeb [19258502.251703] [] ? ip6_rcv_finish+0x0/0x8e [19258502.251703] [] ? ipv6_rcv+0x387/0x47c [19258502.251703] [] ? ip6_rcv_finish+0x0/0x8e [19258502.251703] [] ? __netif_receive_skb+0x367/0x3b6 [19258502.251703] [] ? process_backlog+0x8e/0x146 [19258502.251703] [] ? net_rx_action+0x62/0x119 [19258502.251703] [] ? __do_softirq+0x8b/0x10a [19258502.251703] [] ? do_softirq+0x2b/0x43 [19258502.251703] [] ? run_ksoftirqd+0x73/0x155 [19258502.251703] [] ? run_ksoftirqd+0x0/0x155 [19258502.251703] [] ? kthread+0x61/0x66 [19258502.251703] [] ? kthread+0x0/0x66 [19258502.251703] [] ? kernel_thread_helper+0x6/0x1a [19258502.251703] Code: e8 1b da d4 ff 68 48 89 4d c0 31 c9 31 d2 b8 58 11 68 c0 6a 00 6a 01 6a 02 e8 37 76 d7 ff 8b 9b 60 01 00 00 83 c4 10 85 db 74 07 ff 83 dc 00 00 00 b9 ae 89 4d c0 ba 01 00 00 00 b8 5 [19258502.251703] EIP: [] icmpv6_send+0x5c3/0x6e2 SS:ESP 0068:f7483b48 [19258502.251703] CR2: 00000000676e7543 [19258502.535098] ---[ end trace 0e99e06f98463fb7 ]--- [19258502.540292] Kernel panic - not syncing: Fatal exception in interrupt [19258502.541915] __iptables__: l2tp_2 IN=aaisp3 OUT= MAC= SRC=87.106.29.21 DST=81.2.80.67 LEN=123 TOS=0x00 PREC=0x00 TTL=58 ID=0 DF PROTO=UDP SPT=53 DPT=50245 LEN=103 [19258502.541956] __iptables__: l2tp_2 IN=aaisp3 OUT= MAC= SRC=66.45.29.125 DST=81.2.80.67 LEN=128 TOS=0x00 PREC=0x00 TTL=238 ID=25735 DF PROTO=UDP SPT=53 DPT=41665 LEN=108 [19258502.542038] __iptables__: l2tp_2 IN=aaisp3 OUT= MAC= SRC=2600:2002:0000:0000:0000:0000:0000:0076 DST=2001:08b0:ffea:0000:0053:4150:5841:0001 LEN=152 TC=0 HOPLIMIT=56 FLOWLBL=0 PROTO=UDP SPT=53 DPT=22817 L [19258502.542070] __iptables__: l2tp_2 IN=aaisp3 OUT= MAC= SRC=208.80.124.2 DST=81.2.80.67 LEN=120 TOS=0x00 PREC=0x00 TTL=56 ID=56897 PROTO=UDP SPT=53 DPT=17380 LEN=100 [19258502.612141] Pid: 3, comm: ksoftirqd/0 Tainted: G D W 2.6.35.4-git+ #git+ [19258502.619983] Call Trace: [19258502.622783] [] ? printk+0xf/0x13 [19258502.627394] [] panic+0x55/0xc4 [19258502.631754] [] oops_end+0x6e/0x7c [19258502.636443] [] no_context+0x13f/0x149 [19258502.641434] [] __bad_area_nosemaphore+0x139/0x141 [19258502.647441] [] ? fib6_lookup+0x48/0x5c [19258502.652564] [] ? ip6_pol_route+0x208/0x223 [19258502.657997] [] ? trace_hardirqs_on+0xb/0xd [19258502.663466] [] ? local_bh_enable_ip+0x97/0xad [19258502.669170] [] ? _raw_read_unlock_bh+0x2f/0x32 [19258502.674925] [] ? ip6_pol_route+0x208/0x223 [19258502.680318] [] bad_area_nosemaphore+0xd/0x10 [19258502.685957] [] do_page_fault+0x14e/0x302 [19258502.691291] [] ? __xfrm_lookup+0x32d/0x38b [19258502.696768] [] ? fib6_rule_lookup+0x35/0x77 [19258502.702280] [] ? do_page_fault+0x0/0x302 [19258502.707576] [] error_code+0x6b/0x70 [19258502.712446] [] ? do_page_fault+0x0/0x302 [19258502.717783] [] ? icmpv6_send+0x5c3/0x6e2 [19258502.723047] [] ? _raw_spin_unlock_irqrestore+0x42/0x58 [19258502.729616] [] ? release_console_sem+0x197/0x1c4 [19258502.735622] [] reject_tg6+0x70/0x43f [ip6t_REJECT] [19258502.741855] [] ? ip6t_log_packet+0x15d/0x167 [ip6t_LOG] [19258502.748512] [] ? trace_hardirqs_on+0xb/0xd [19258502.753997] [] ? local_bh_enable_ip+0x97/0xad [19258502.759716] [] ? _raw_spin_unlock_bh+0x2f/0x32 [19258502.765543] [] ? ip6t_log_packet+0x15d/0x167 [ip6t_LOG] [19258502.772245] [] ? ipv6_find_hdr+0xf8/0x164 [ip6_tables] [19258502.778739] [] ip6t_do_table+0x4c8/0x53e [ip6_tables] [19258502.785126] [] ? ip6table_mangle_hook+0xf0/0x100 [ip6table_mangle] [19258502.792698] [] ip6table_filter_hook+0x18/0x20 [ip6table_filter] [19258502.800096] [] nf_iterate+0x2f/0x62 [19258502.804934] [] ? ip6_input_finish+0x0/0x3db [19258502.810438] [] nf_hook_slow+0x63/0xeb [19258502.815466] [] ? ip6_input_finish+0x0/0x3db [19258502.821049] [] ip6_input+0x33/0x47 [19258502.825833] [] ? ip6_input_finish+0x0/0x3db [19258502.831446] [] ip6_rcv_finish+0x8b/0x8e [19258502.836649] [] nf_ct_frag6_output+0x7c/0x95 [nf_conntrack_ipv6] [19258502.844072] [] ipv6_defrag+0x87/0x9f [nf_conntrack_ipv6] [19258502.850871] [] ? ip6_rcv_finish+0x0/0x8e [19258502.856156] [] nf_iterate+0x2f/0x62 [19258502.860968] [] ? ip6_rcv_finish+0x0/0x8e [19258502.866315] [] nf_hook_slow+0x63/0xeb [19258502.871290] [] ? ip6_rcv_finish+0x0/0x8e [19258502.876614] [] ipv6_rcv+0x387/0x47c [19258502.881476] [] ? ip6_rcv_finish+0x0/0x8e [19258502.886807] [] __netif_receive_skb+0x367/0x3b6 [19258502.892639] [] process_backlog+0x8e/0x146 [19258502.897996] [] net_rx_action+0x62/0x119 [19258502.903187] [] __do_softirq+0x8b/0x10a [19258502.908305] [] do_softirq+0x2b/0x43 [19258502.913157] [] run_ksoftirqd+0x73/0x155 [19258502.918401] [] ? run_ksoftirqd+0x0/0x155 [19258502.923693] [] kthread+0x61/0x66 [19258502.928301] [] ? kthread+0x0/0x66 [19258502.933014] [] kernel_thread_helper+0x6/0x1a [19258502.938655] Rebooting in 10 seconds.. -- Simon Arlott