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Message-ID: <BANLkTik3iseHFah_s=NNasQ22NtA+9zLWA@mail.gmail.com> Date: Sat, 18 Jun 2011 19:12:57 -0500 From: Shane <software.research.development@...il.com> To: linux-kernel@...r.kernel.org Subject: tracing kernel panics Anyone offer advice on how I should go about tracking down this kernel panic? Apologies if I've got the wrong list, let me know. I'm developing a networking module, my own protocol over TCP. I load my module, I make a network connection, and then I close it. I do nothing more, then after about 1-2 minutes, it throws this panic output and none of it seems to come from my module code. I know my code is the problem, and if I don't run my modules, I never get panics. But nothing in the stack trace I recognize from my code and I'm having a very hard time find where in my code I've gone wrong. I run my kernel modules in a VM as a guest OS which connects to another guest OS (currently using 2.6.36-r5). I've read how to analyze an OOPS, but ... here I can't even find the file that this might belong to so as to disassemble it, or understand what device this is. Any suggestions/pointers/advice much appreciated? [ 330.828880] general protection fault: 0000 [#1] SMP [ 330.829809] last sysfs file: /sys/devices/virtio-pci/virtio1/block/vda/dev [ 330.829809] CPU 0 [ 330.829809] Modules linked in: mod1 mod2 [ 330.829809] [ 330.829809] Pid: 0, comm: swapper Not tainted 2.6.36-gentoo-r5 #8 /Bochs [ 330.829809] RIP: 0010:[<ffffffff8148c3f3>] [<ffffffff8148c3f3>] fib_table_lookup+0x48/0x9e [ 330.829809] RSP: 0018:ffff880001e038f0 EFLAGS: 00010246 [ 330.829809] RAX: 0000000000000000 RBX: ffff88001f1edac0 RCX: 0000000000000018 [ 330.829809] RDX: 00000000000000c0 RSI: ffff88001f1edac0 RDI: 00000000000000c0 [ 330.829809] RBP: ffff880001e03920 R08: ffffffff81c48a10 R09: ffff880001e03b48 [ 330.829809] R10: 000000001564a8c0 R11: 00000000fe64a8c0 R12: 0001e00000010100 [ 330.829809] R13: 000000001e0488c0 R14: ffff880001e039f0 R15: ffff880001e03a30 [ 330.829809] FS: 0000000000000000(0000) GS:ffff880001e00000(0000) knlGS:0000000000000000 [ 330.829809] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 330.829809] CR2: 00007f608e5a1240 CR3: 000000001f0ee000 CR4: 00000000000006f0 [ 330.829809] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 330.829809] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 330.829809] Process swapper (pid: 0, threadinfo ffffffff81a00000, task ffffffff81a11020) [ 330.829809] Stack: [ 330.829809] ffff880001e03910 ffff880001e039f0 ffff880001e039a0 ffff88001fa57a80 [ 330.829809] <0> ffff880001e039a0 0000000000000000 ffff880001e03940 ffffffff8148d61c [ 330.829809] <0> ffff88001fa57240 ffff880001e039f0 ffff880001e03990 ffffffff81438045 [ 330.829809] Call Trace: [ 330.829809] <IRQ> [ 330.829809] [<ffffffff8148d61c>] fib4_rule_action+0x4e/0x5c [ 330.829809] [<ffffffff81438045>] fib_rules_lookup+0xa2/0xd8 [ 330.829809] [<ffffffff8148d6eb>] fib_lookup+0x32/0x43 [ 330.829809] [<ffffffff814889c1>] fib_validate_source+0x23a/0x247 [ 330.829809] [<ffffffff81459845>] ip_route_input_slow+0x19b/0x85b [ 330.829809] [<ffffffff8145a382>] ip_route_input_common+0x47d/0x493 [ 330.829809] [<ffffffff81059608>] ? check_preempt_curr_idle+0x10/0x12 [ 330.829809] [<ffffffff8107d8e0>] ? wq_worker_waking_up+0x10/0x3b [ 330.829809] [<ffffffff8147f763>] arp_process+0x1a8/0x4e9 [ 330.829809] [<ffffffff8104b236>] ? pvclock_clocksource_read+0x4b/0xb4 [ 330.829809] [<ffffffff8147f5bb>] ? arp_process+0x0/0x4e9 [ 330.829809] [<ffffffff8147f14f>] T.964+0x4c/0x54 [ 330.829809] [<ffffffff8147f400>] arp_rcv+0xcb/0xe0 [ 330.829809] [<ffffffff81425a98>] __netif_receive_skb+0x3cd/0x3f3 [ 330.829809] [<ffffffff81426922>] netif_receive_skb+0x67/0x6e [ 330.829809] [<ffffffff8141f561>] ? __netdev_alloc_skb+0x2f/0x4c [ 330.829809] [<ffffffff813367c2>] virtnet_poll+0x4b3/0x58e [ 330.829809] [<ffffffff81043857>] ? lapic_next_event+0x18/0x1c [ 330.829809] [<ffffffff8104b236>] ? pvclock_clocksource_read+0x4b/0xb4 [ 330.829809] [<ffffffff81426ae6>] net_rx_action+0xad/0x211 [ 330.829809] [<ffffffff8106d6b8>] __do_softirq+0xe4/0x1ac [ 330.829809] [<ffffffff810b21fc>] ? handle_IRQ_event+0x52/0x11d [ 330.829809] [<ffffffff8102c95c>] call_softirq+0x1c/0x28 [ 330.829809] [<ffffffff8102dee1>] do_softirq+0x41/0x7e [ 330.829809] [<ffffffff8106d52f>] irq_exit+0x36/0x78 [ 330.829809] [<ffffffff8102d61c>] do_IRQ+0xa7/0xbe [ 330.829809] [<ffffffff815551d3>] ret_from_intr+0x0/0x11 [ 330.829809] <EOI> [ 330.829809] [<ffffffff8104a8f0>] ? native_safe_halt+0x6/0x8 [ 330.829809] [<ffffffff81032ccc>] default_idle+0x39/0x56 [ 330.829809] [<ffffffff8102ab84>] cpu_idle+0x67/0xd9 [ 330.829809] [<ffffffff81537219>] rest_init+0x6d/0x6f [ 330.829809] [<ffffffff81aeed0b>] start_kernel+0x384/0x38f [ 330.829809] [<ffffffff81aee2ac>] x86_64_start_reservations+0xb3/0xb7 [ 330.829809] [<ffffffff81aee3ab>] x86_64_start_kernel+0xfb/0x10a [ 330.829809] Code: 14 ae aa 81 e8 86 89 0c 00 48 8b 9b 20 01 00 00 eb 52 44 8b 6b 20 4c 8b 63 08 45 23 6e 0c 48 89 de 44 89 ef e8 9f f7 ff ff 89 c0 <4d> 8b 24 c4 eb 1b 8b 4b 1c 49 8d 7c 24 10 4c 89 fa 4c 89 f6 e8 [ 330.829809] RIP [<ffffffff8148c3f3>] fib_table_lookup+0x48/0x9e [ 330.829809] RSP <ffff880001e038f0> [ 330.898565] ---[ end trace 7718620ea31b2192 ]--- [ 330.899433] Kernel panic - not syncing: Fatal exception in interrupt [ 330.900596] Pid: 0, comm: swapper Tainted: G D 2.6.36-gentoo-r5 #8 [ 330.901878] Call Trace: [ 330.902348] <IRQ> [<ffffffff81552f21>] panic+0x8c/0x19a [ 330.903362] [<ffffffff81068744>] ? kmsg_dump+0x126/0x140 [ 330.904356] [<ffffffff81555fab>] oops_end+0xb1/0xc1 [ 330.905271] [<ffffffff8102ef35>] die+0x55/0x5e [ 330.906120] [<ffffffff81555b86>] do_general_protection+0x130/0x138 [ 330.907273] [<ffffffff815553f5>] general_protection+0x25/0x30 [ 330.908347] [<ffffffff8148c3f3>] ? fib_table_lookup+0x48/0x9e [ 330.909418] [<ffffffff8148d61c>] fib4_rule_action+0x4e/0x5c [ 330.910455] [<ffffffff81438045>] fib_rules_lookup+0xa2/0xd8 [ 330.911496] [<ffffffff8148d6eb>] fib_lookup+0x32/0x43 [ 330.912447] [<ffffffff814889c1>] fib_validate_source+0x23a/0x247 [ 330.913567] [<ffffffff81459845>] ip_route_input_slow+0x19b/0x85b [ 330.914687] [<ffffffff8145a382>] ip_route_input_common+0x47d/0x493 [ 330.915863] [<ffffffff81059608>] ? check_preempt_curr_idle+0x10/0x12 [ 330.917042] [<ffffffff8107d8e0>] ? wq_worker_waking_up+0x10/0x3b [ 330.918150] [<ffffffff8147f763>] arp_process+0x1a8/0x4e9 [ 330.919137] [<ffffffff8104b236>] ? pvclock_clocksource_read+0x4b/0xb4 [ 330.920319] [<ffffffff8147f5bb>] ? arp_process+0x0/0x4e9 [ 330.921309] [<ffffffff8147f14f>] T.964+0x4c/0x54 [ 330.922179] [<ffffffff8147f400>] arp_rcv+0xcb/0xe0 [ 330.923077] [<ffffffff81425a98>] __netif_receive_skb+0x3cd/0x3f3 [ 330.924195] [<ffffffff81426922>] netif_receive_skb+0x67/0x6e [ 330.925248] [<ffffffff8141f561>] ? __netdev_alloc_skb+0x2f/0x4c [ 330.926344] [<ffffffff813367c2>] virtnet_poll+0x4b3/0x58e [ 330.927354] [<ffffffff81043857>] ? lapic_next_event+0x18/0x1c [ 330.928441] [<ffffffff8104b236>] ? pvclock_clocksource_read+0x4b/0xb4 [ 330.929636] [<ffffffff81426ae6>] net_rx_action+0xad/0x211 [ 330.930648] [<ffffffff8106d6b8>] __do_softirq+0xe4/0x1ac [ 330.931645] [<ffffffff810b21fc>] ? handle_IRQ_event+0x52/0x11d [ 330.932756] [<ffffffff8102c95c>] call_softirq+0x1c/0x28 [ 330.933737] [<ffffffff8102dee1>] do_softirq+0x41/0x7e [ 330.934674] [<ffffffff8106d52f>] irq_exit+0x36/0x78 [ 330.935600] [<ffffffff8102d61c>] do_IRQ+0xa7/0xbe [ 330.936495] [<ffffffff815551d3>] ret_from_intr+0x0/0x11 [ 330.937477] <EOI> [<ffffffff8104a8f0>] ? native_safe_halt+0x6/0x8 [ 330.938646] [<ffffffff81032ccc>] default_idle+0x39/0x56 [ 330.939636] [<ffffffff8102ab84>] cpu_idle+0x67/0xd9 [ 330.940552] [<ffffffff81537219>] rest_init+0x6d/0x6f [ 330.941489] [<ffffffff81aeed0b>] start_kernel+0x384/0x38f [ 330.942499] [<ffffffff81aee2ac>] x86_64_start_reservations+0xb3/0xb7 [ 330.943680] [<ffffffff81aee3ab>] x86_64_start_kernel+0xfb/0x10a The following two panics are very similar, and common panics that I get as well. I threw them in here in case anyone recognized these aswell or could give clues on how to find such problems. [ 80.945614] BUG: unable to handle kernel paging request at ffffffff8141a744 [ 80.946046] IP: [<ffffffff812cfdfb>] do_virtblk_request+0x73/0x27c [ 80.946046] PGD 1a0b067 PUD 1a0f063 PMD 14001e1 [ 80.946046] Oops: 0003 [#1] SMP [ 80.946046] last sysfs file: /sys/devices/virtio-pci/virtio1/block/vda/dev [ 80.946046] CPU 0 [ 80.946046] Modules linked in: mod1 mod2 [ 80.946046] [ 80.946046] Pid: 1271, comm: flush-253:0 Not tainted 2.6.36-gentoo-r5 #8 /Bochs [ 80.946046] RIP: 0010:[<ffffffff812cfdfb>] [<ffffffff812cfdfb>]do_virtblk_request+0x73/0x27c [ 80.946046] RSP: 0018:ffff88001e941750 EFLAGS: 00010082 [ 80.946046] RAX: ffffffff8141a734 RBX: ffffffff8141a734 RCX: 0000000000000040 [ 80.946046] RDX: 0000000000000040 RSI: ffffffff8141a734 RDI: ffffffff810d5be2 [ 80.946046] RBP: ffff88001e9417c0 R08: 0000000000011220 R09: ffff88001e941740 [ 80.946046] R10: ffff88001f2d2b88 R11: ffff88001f2700c0 R12: ffff88001fa52000 [ 80.946046] R13: ffff88001f2d2b88 R14: 0000000000000002 R15: ffff88001f2ae618 [ 80.946046] FS: 0000000000000000(0000) GS:ffff880001e00000(0000)knlGS:0000000000000000 [ 80.946046] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 80.946046] CR2: ffffffff8141a744 CR3: 000000001edea000 CR4: 00000000000006f0 [ 80.946046] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 80.946046] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 80.946046] Process flush-253:0 (pid: 1271, threadinfo ffff88001e940000, task ffff88001edf2530) [ 80.946046] Stack: [ 80.946046] 0000000000000000 0000000000000001 0000000000000001ffff88001fa52020 [ 80.946046] <0> ffff88001fa52060 ffff88001fa52040 000000011e9417b00000000000000001 [ 80.946046] <0> ffff88001f2ae618 ffff88001f2ae618 ffff88001f2ae618ffff88001f2d2e18 [ 80.946046] Call Trace: [ 80.946046] [<ffffffff811d85fa>] __generic_unplug_device+0x32/0x37 [ 80.946046] [<ffffffff811d30f5>] elv_insert+0x1d6/0x1df [ 80.946046] [<ffffffff811d3196>] __elv_add_request+0x98/0x9f [ 80.946046] [<ffffffff811d8d01>] __make_request+0x3c2/0x44b [ 80.946046] [<ffffffff811d7400>] generic_make_request+0x287/0x2f7 [ 80.946046] [<ffffffff811d7400>] ? generic_make_request+0x287/0x2f7 [ 80.946046] [<ffffffff811f593d>] ? __percpu_counter_add+0x47/0x63 [ 80.946046] [<ffffffff811d7537>] submit_bio+0xc7/0xd0 [ 80.946046] [<ffffffff8112e081>] submit_bh+0xe6/0x108 [ 80.946046] [<ffffffff81130663>] __block_write_full_page+0x1d8/0x2b7 [ 80.946046] [<ffffffff8112f45b>] ? end_buffer_async_write+0x0/0x112 [ 80.946046] [<ffffffff8112f45b>] ? end_buffer_async_write+0x0/0x112 [ 80.946046] [<ffffffff811307c6>] block_write_full_page_endio+0x84/0x90 [ 80.946046] [<ffffffff811307e2>] block_write_full_page+0x10/0x12 [ 80.946046] [<ffffffff81167bbb>] ext3_writeback_writepage+0xad/0x123 [ 80.946046] [<ffffffff810da749>] __writepage+0x12/0x2b [ 80.946046] [<ffffffff810db9cb>] write_cache_pages+0x25d/0x38a [ 80.946046] [<ffffffff810da737>] ? __writepage+0x0/0x2b [ 80.946046] [<ffffffff810dbb17>] generic_writepages+0x1f/0x21 [ 80.946046] [<ffffffff810dbb3c>] do_writepages+0x23/0x25 [ 80.946046] [<ffffffff81128934>] writeback_single_inode+0x9b/0x1fd [ 80.946046] [<ffffffff81128dbf>] writeback_sb_inodes+0xae/0x120 [ 80.946046] [<ffffffff811294a2>] writeback_inodes_wb+0x111/0x123 [ 80.946046] [<ffffffff811296a0>] wb_writeback+0x1ec/0x313 [ 80.946046] [<ffffffff81074185>] ? try_to_del_timer_sync+0x76/0x84 [ 80.946046] [<ffffffff81129933>] wb_do_writeback+0x16c/0x18a [ 80.946046] [<ffffffff81129a15>] bdi_writeback_thread+0xc4/0x1fd [ 80.946046] [<ffffffff81129951>] ? bdi_writeback_thread+0x0/0x1fd [ 80.946046] [<ffffffff81129951>] ? bdi_writeback_thread+0x0/0x1fd [ 80.946046] [<ffffffff81080e60>] kthread+0x7d/0x85 [ 80.946046] [<ffffffff8102c864>] kernel_thread_helper+0x4/0x10 [ 80.946046] [<ffffffff81080de3>] ? kthread+0x0/0x85 [ 80.946046] [<ffffffff8102c860>] ? kernel_thread_helper+0x0/0x10 [ 80.946046] Code: 00 00 83 c0 02 41 3b 44 24 38 76 04 0f 0b eb fe 49 8b 7c 24 30 be 20 00 00 00 e8 ef 5e e0 ff 48 89 c3 48 85 c0 0f 84 cc 01 00 00 <4c> 89 68 10 41 f6 45 43 04 74 09 c7 40 18 04 00 00 00 eb 36 41 [ 80.946046] RIP [<ffffffff812cfdfb>] do_virtblk_request+0x73/0x27c [ 80.946046] RSP <ffff88001e941750> [ 80.946046] CR2: ffffffff8141a744 [ 80.946046] ---[ end trace 374c5ac65f1b6e14 ]--- Another similiar OOPS ... [ 331.384306] BUG: unable to handle kernel paging request at 000000001ec0f398 [ 331.385053] IP: [<ffffffff81106e32>] __kmalloc+0xd3/0x138 [ 331.385053] PGD 1f0f7067 PUD 1f0f8067 PMD 0 [ 331.385053] Oops: 0000 [#1] SMP [ 331.385053] last sysfs file: /sys/devices/virtio-pci/virtio1/block/vda/dev [ 331.385053] CPU 0 [ 331.385053] Modules linked in: mod1 mod2 [ 331.385053] [ 331.385053] Pid: 1267, comm: flush-253:0 Not tainted2.6.36-gentoo-r5 #8 /Bochs [ 331.385053] RIP: 0010:[<ffffffff81106e32>] [<ffffffff81106e32>]__kmalloc+0xd3/0x138 [ 331.385053] RSP: 0018:ffff88001f08b690 EFLAGS: 00010002 [ 331.385053] RAX: 0000000000000000 RBX: 000000001ec0f398 RCX: ffffffff81273866 [ 331.385053] RDX: 0000000000000003 RSI: 0000000000000020 RDI: 0000000000000006 [ 331.385053] RBP: ffff88001f08b6d0 R08: ffff880001e10390 R09: 0000000000000020 [ 331.385053] R10: 0000160000000000 R11: 0000000000000000 R12: ffffffff81a04290 [ 331.385053] R13: 0000000000000030 R14: 0000000000000020 R15: 0000000000000020 [ 331.385053] FS: 0000000000000000(0000) GS:ffff880001e00000(0000)knlGS:0000000000000000 [ 331.385053] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 331.385053] CR2: 000000001ec0f398 CR3: 000000001fa85000 CR4: 00000000000006f0 [ 331.385053] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 331.385053] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 331.385053] Process flush-253:0 (pid: 1267, threadinfoffff88001f08a000, task ffff88001e8e8000) [ 331.385053] Stack: [ 331.385053] ffff88001f08b6f8 0000000000000046 ffff88001f08b6b0ffff88001fafe800 [ 331.385053] <0> 0000000000000002 ffff88001f962040 0000000000000001ffff88001ec0f3c0 [ 331.385053] <0> ffff88001f08b740 ffffffff81273866 ffff88001f2a6618ffff88001f2a6618 [ 331.385053] Call Trace: [ 331.385053] [<ffffffff81273866>] virtqueue_add_buf_gfp+0x5b/0x356 [ 331.385053] [<ffffffff811d7941>] ? blk_peek_request+0x41/0x1a7 [ 331.385053] [<ffffffff812cff8f>] do_virtblk_request+0x207/0x27c [ 331.385053] [<ffffffff811d85fa>] __generic_unplug_device+0x32/0x37 [ 331.385053] [<ffffffff811d30f5>] elv_insert+0x1d6/0x1df [ 331.385053] [<ffffffff811d3196>] __elv_add_request+0x98/0x9f [ 331.385053] [<ffffffff811d8d01>] __make_request+0x3c2/0x44b [ 331.385053] [<ffffffff811d7400>] generic_make_request+0x287/0x2f7 [ 331.385053] [<ffffffff811d7400>] ? generic_make_request+0x287/0x2f7 [ 331.385053] [<ffffffff811d7537>] submit_bio+0xc7/0xd0 [ 331.385053] [<ffffffff8112e081>] submit_bh+0xe6/0x108 [ 331.385053] [<ffffffff81130663>] __block_write_full_page+0x1d8/0x2b7 [ 331.385053] [<ffffffff8112f45b>] ? end_buffer_async_write+0x0/0x112 [ 331.385053] [<ffffffff8112f45b>] ? end_buffer_async_write+0x0/0x112 [ 331.385053] [<ffffffff811307c6>] block_write_full_page_endio+0x84/0x90 [ 331.385053] [<ffffffff811307e2>] block_write_full_page+0x10/0x12 [ 331.385053] [<ffffffff81167bbb>] ext3_writeback_writepage+0xad/0x123 [ 331.385053] [<ffffffff810da749>] __writepage+0x12/0x2b [ 331.385053] [<ffffffff810db9cb>] write_cache_pages+0x25d/0x38a [ 331.385053] [<ffffffff810da737>] ? __writepage+0x0/0x2b [ 331.385053] [<ffffffff810dbb17>] generic_writepages+0x1f/0x21 [ 331.385053] [<ffffffff810dbb3c>] do_writepages+0x23/0x25 [ 331.385053] [<ffffffff81128934>] writeback_single_inode+0x9b/0x1fd [ 331.385053] [<ffffffff81128dbf>] writeback_sb_inodes+0xae/0x120 [ 331.385053] [<ffffffff811294a2>] writeback_inodes_wb+0x111/0x123 [ 331.385053] [<ffffffff811296a0>] wb_writeback+0x1ec/0x313 [ 331.385053] [<ffffffff81074185>] ? try_to_del_timer_sync+0x76/0x84 [ 331.385053] [<ffffffff81129933>] wb_do_writeback+0x16c/0x18a [ 331.385053] [<ffffffff81129a15>] bdi_writeback_thread+0xc4/0x1fd [ 331.385053] [<ffffffff81129951>] ? bdi_writeback_thread+0x0/0x1fd [ 331.385053] [<ffffffff81129951>] ? bdi_writeback_thread+0x0/0x1fd [ 331.385053] [<ffffffff81080e60>] kthread+0x7d/0x85 [ 331.385053] [<ffffffff8102c864>] kernel_thread_helper+0x4/0x10 [ 331.385053] [<ffffffff81080de3>] ? kthread+0x0/0x85 [ 331.385053] [<ffffffff8102c860>] ? kernel_thread_helper+0x0/0x10 [ 331.385053] Code: 44 00 00 48 89 45 c8 fa 66 0f 1f 44 00 00 65 4c 8b 04 25 a0 d5 00 00 49 8b 04 24 49 01 c0 49 8b 18 48 85 db 74 0e 49 63 44 24 18 <48> 8b 04 03 49 89 00 eb 11 83 ca ff 44 89 fe 4c 89 e7 e8 ac f0 [ 331.385053] RIP [<ffffffff81106e32>] __kmalloc+0xd3/0x138 [ 331.385053] RSP <ffff88001f08b690> [ 331.385053] CR2: 000000001ec0f398 [ 331.385053] ---[ end trace c03bf8afe807b25a ]--- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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