Hi Martin! Hi all!
Here we go again: same bug with disabled NC.
Now I run the VM with NC and MM disabled until next Monday.
Is this bug Batman-adv or kernel related?
Best regards
Philipp
________________________ Freifunk Rheinland e. V. – Funkzelle Wuppertal –
SYSTEM MAP: /boot/System.map DEBUG KERNEL: /usr/src/linux-3.16.7-gentoo/vmlinux (3.16.7-gentoo) DUMPFILE: vmcore_20141124124133 CPUS: 1 DATE: Mon Nov 24 12:35:05 2014 UPTIME: 1 days, 16:17:07 LOAD AVERAGE: 0.15, 0.21, 0.20 TASKS: 144 NODENAME: wolke RELEASE: 3.16.7-gentoo VERSION: #1 SMP Mon Nov 17 03:44:22 CET 2014 MACHINE: x86_64 (2593 Mhz) MEMORY: 511.6 MB PANIC: "kernel BUG at net/core/skbuff.c:100!" PID: 2008 COMMAND: "fastd" TASK: ffff88001f3dbdb0 [THREAD_INFO: ffff880019214000] CPU: 0 STATE: TASK_RUNNING (PANIC)
crash> bt PID: 2008 TASK: ffff88001f3dbdb0 CPU: 0 COMMAND: "fastd" #0 [ffff88001fc03980] machine_kexec at ffffffff8103a34e #1 [ffff88001fc039e0] crash_kexec at ffffffff810be503 #2 [ffff88001fc03ab0] oops_end at ffffffff81005fc8 #3 [ffff88001fc03ae0] die at ffffffff81006463 #4 [ffff88001fc03b10] do_trap at ffffffff81002e12 #5 [ffff88001fc03b70] do_error_trap at ffffffff8100316d #6 [ffff88001fc03c30] do_invalid_op at ffffffff8100394b #7 [ffff88001fc03c40] invalid_op at ffffffff817f385e [exception RIP: skb_panic+94] RIP: ffffffff817eb99d RSP: ffff88001fc03cf8 RFLAGS: 00010296 RAX: 000000000000008b RBX: ffff880000011a40 RCX: 0000000000000092 RDX: 0000000000000083 RSI: 0000000000000046 RDI: 0000000000000246 RBP: ffff88001fc03d18 R8: 0000000000000000 R9: 0000000000000000 R10: 00000000000001af R11: 0000000000000006 R12: 0000000000000564 R13: ffff88001fc03da0 R14: ffff88001f19d600 R15: ffff880013d55062 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 #8 [ffff88001fc03d20] skb_put at ffffffff81611bb1 #9 [ffff88001fc03d30] batadv_frag_skb_buffer at ffffffffa001be12 [batman_adv] #10 [ffff88001fc03d90] batadv_recv_frag_packet at ffffffffa0026273 [batman_adv] #11 [ffff88001fc03dd0] batadv_batman_skb_recv at ffffffffa001fef5 [batman_adv] #12 [ffff88001fc03e10] __netif_receive_skb_core at ffffffff81621962 #13 [ffff88001fc03e80] __netif_receive_skb at ffffffff81621e91 #14 [ffff88001fc03ea0] process_backlog at ffffffff81621f7e #15 [ffff88001fc03ef0] net_rx_action at ffffffff81622731 #16 [ffff88001fc03f50] __do_softirq at ffffffff81053ef8 #17 [ffff88001fc03fb0] do_softirq_own_stack at ffffffff817f3a5c --- <IRQ stack> --- #18 [ffff880019217d10] do_softirq_own_stack at ffffffff817f3a5c [exception RIP: tun_get_user+1056] RIP: ffffffffa00098f0 RSP: 0000000000000001 RFLAGS: 7fff00000586 RAX: ffffffff816210b4 RBX: ffff880019217d58 RCX: ffff88001932c780 RDX: 0000000000000000 RSI: ffff88001932c780 RDI: 0000000000000586 RBP: ffffffff81620de4 R8: ffff880019217d88 R9: ffff88001932c780 R10: ffff88001932c780 R11: ffffffff81054135 R12: ffff880019217d58 R13: 0000000000000586 R14: ffff88001f19d800 R15: 0000000000000000 ORIG_RAX: ffff880019217e38 CS: 7fff3207c250 SS: 0000 bt: WARNING: possibly bogus exception frame #19 [ffff880019217e40] tun_chr_aio_write at ffffffffa0009e0b [tun] #20 [ffff880019217e70] do_sync_write at ffffffff8115c665 #21 [ffff880019217f00] vfs_write at ffffffff8115d38a #22 [ffff880019217f40] sys_write at ffffffff8115d89a #23 [ffff880019217f80] system_call_fastpath at ffffffff817f1f29 RIP: 00007ffe0dbc637d RSP: 00007fff3207c4d8 RFLAGS: 00010202 RAX: 0000000000000001 RBX: ffffffff817f1f29 RCX: 0000000000000084 RDX: 0000000000000586 RSI: 00000000007c0f00 RDI: 0000000000000009 RBP: 0000000000000586 R8: 00007ffe0dbaf400 R9: 00007fff3207b998 R10: 00007fff3207c0df R11: 0000000000000293 R12: 00000000007c8278 R13: 0000000000000001 R14: 00000000007c0ef0 R15: 00000000007b96a0 ORIG_RAX: 0000000000000001 CS: 0033 SS: 002b
crash> log [ … ] [ 85.585384] random: nonblocking pool is initialized [ 344.074524] tun: Universal TUN/TAP device driver, 1.6 [ 344.074529] tun: (C) 1999-2004 Max Krasnyansky maxk@qualcomm.com [ 345.437185] batman_adv: B.A.T.M.A.N. advanced 2014.3.0 (compatibility version 15) loaded [ 345.586455] batman_adv: bat0: Adding interface: fastd0 [ 345.586459] batman_adv: bat0: The MTU of interface fastd0 is too small (1426) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 345.586463] batman_adv: bat0: Interface activated: fastd0 [ 345.587575] batman_adv: bat0: orig_interval: Changing from: 1000 to: 5000 [ 345.589193] batman_adv: bat0: bridge_loop_avoidance: Changing from: disabled to: enabled [ 345.590126] batman_adv: bat0: Changing gw mode from: off to: client [ 385.143545] ipip: IPv4 over IPv4 tunneling driver [ 387.153331] dhcpd (2100) used greatest stack depth: 11944 bytes left [ 420.953976] batman_adv: bat0: Changing gw mode from: client to: server [ 420.954124] batman_adv: bat0: Changing gateway bandwidth from: '10.0/2.0 MBit' to: '100.0/100.0 MBit' [ 442.064172] batman_adv: bat0: network_coding: Changing from: enabled to: disabled [ 737.948219] nf_conntrack: automatic helper assignment is deprecated and it will be removed soon. Use the iptables CT target to attach helpers instead. [ 6441.957012] dig (23207) used greatest stack depth: 11832 bytes left [24933.266728] UDP: bad checksum. From _._._._:137 to _._._._ ulen 58 [24933.267969] UDP: bad checksum. From _._._._:137 to _._._._ ulen 58 [79218.832519] UDP: short packet: From _._._._:0 6117/1480 to _._._._:0 [88652.433174] UDP: short packet: From _._._._:0 6117/1480 to _._._._:0 [145027.089070] skbuff: skb_over_panic: text:ffffffffa001be12 len:1448 put:1380 head:ffff88000e4c0c00 data:ffff88000e4c0c62 tail:0x60a end:0x2c0 dev:fastd0 [145027.089388] ------------[ cut here ]------------ [145027.089492] kernel BUG at net/core/skbuff.c:100! [145027.089590] invalid opcode: 0000 [#1] SMP [145027.089691] Modules linked in: xt_nat iptable_nat nf_nat_ipv4 nf_nat ipip batman_adv libcrc32c tun crc32c_intel [145027.089977] CPU: 0 PID: 2008 Comm: fastd Not tainted 3.16.7-gentoo #1 [145027.090003] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007 [145027.090003] task: ffff88001f3dbdb0 ti: ffff880019214000 task.ti: ffff880019214000 [145027.090003] RIP: 0010:[<ffffffff817eb99d>] [<ffffffff817eb99d>] skb_panic+0x5e/0x60 [145027.090003] RSP: 0018:ffff88001fc03cf8 EFLAGS: 00010296 [145027.090003] RAX: 000000000000008b RBX: ffff880000011a40 RCX: 0000000000000092 [145027.090003] RDX: 0000000000000083 RSI: 0000000000000046 RDI: 0000000000000246 [145027.090003] RBP: ffff88001fc03d18 R08: 0000000000000000 R09: 0000000000000000 [145027.090003] R10: 00000000000001af R11: 0000000000000006 R12: 0000000000000564 [145027.090003] R13: ffff88001fc03da0 R14: ffff88001f19d600 R15: ffff880013d55062 [145027.090003] FS: 00007ffe0e872700(0000) GS:ffff88001fc00000(0000) knlGS:0000000000000000 [145027.090003] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [145027.090003] CR2: 00007f410b4a24b0 CR3: 0000000019282000 CR4: 00000000000006f0 [145027.090003] Stack: [145027.090003] ffff88000e4c0c62 000000000000060a 00000000000002c0 ffff88001932c000 [145027.090003] ffff88001fc03d28 ffffffff81611bb1 ffff88001fc03d88 ffffffffa001be12 [145027.090003] ffff880019cf59c8 ffff880013d5504e ffff88001fc03d78 ffff880000011a40 [145027.090003] Call Trace: [145027.090003] <IRQ> [145027.090003] [145027.090003] [<ffffffff81611bb1>] skb_put+0x41/0x50 [145027.090003] [<ffffffffa001be12>] batadv_frag_skb_buffer+0x272/0x470 [batman_adv] [145027.090003] [<ffffffffa0026273>] batadv_recv_frag_packet+0x183/0x200 [batman_adv] [145027.090003] [<ffffffffa001fef5>] batadv_batman_skb_recv+0xd5/0x110 [batman_adv] [145027.090003] [<ffffffff81621962>] __netif_receive_skb_core+0x222/0x730 [145027.090003] [<ffffffff81621e91>] __netif_receive_skb+0x21/0x70 [145027.090003] [<ffffffff81621f7e>] process_backlog+0x9e/0x170 [145027.090003] [<ffffffff81622731>] net_rx_action+0x141/0x240 [145027.090003] [<ffffffff81053ef8>] __do_softirq+0xe8/0x280 [145027.090003] [<ffffffff817f3a5c>] do_softirq_own_stack+0x1c/0x30 [145027.090003] <EOI> [145027.090003] [145027.090003] [<ffffffff81054135>] do_softirq+0x55/0x60 [145027.090003] [<ffffffff816210b4>] netif_rx_ni+0x34/0x70 [145027.090003] [<ffffffffa00098f0>] tun_get_user+0x420/0x840 [tun] [145027.090003] [<ffffffffa0009e0b>] tun_chr_aio_write+0x7b/0xa0 [tun] [145027.090003] [<ffffffff8115c665>] do_sync_write+0x55/0x90 [145027.090003] [<ffffffff8115d38a>] vfs_write+0xba/0x1f0 [145027.090003] [<ffffffff8115d89a>] SyS_write+0x4a/0xa0 [145027.090003] [<ffffffff817f1f29>] system_call_fastpath+0x16/0x1b [145027.090003] Code: 00 00 48 89 44 24 10 8b 87 c0 00 00 00 48 89 44 24 08 48 8b 87 d0 00 00 00 48 c7 c7 30 67 a3 81 48 89 04 24 31 c0 e8 0d 8b ff ff <0f> 0b 55 48 89 f8 48 8b 57 30 48 89 e5 48 8b 0f 5d 80 e5 80 48 [145027.090003] RIP [<ffffffff817eb99d>] skb_panic+0x5e/0x60 [145027.090003] RSP <ffff88001fc03cf8>