Chris, I work with Steve and was able to reproduce with the lockdep debugging, the output as follows:
[18075576.538133] BUG: unable to handle kernel paging request at ffffc900038ebac8 [18075576.538153] IP: [<ffffffffa013d1a1>] nf_nat_cleanup_conntrack+0x41/0x70 [nf_nat] [18075576.538166] PGD 1b6428067 PUD 1b6429067 PMD 152eae067 PTE 0 [18075576.538176] Oops: 0002 [#1] SMP [18075576.538183] Modules linked in: xt_nat veth tcp_diag inet_diag xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat bridge stp llc xt_owner isofs ipt_REJECT xt_LOG xt_limit nf_conntrack_ipv4 nf_defrag_ipv4 xt_tcpudp xt_conntrack nf_conntrack iptable_filter ip_tables x_tables dm_crypt microcode raid10 raid456 async_memcpy async_raid6_recov async_pq async_xor async_tx xor raid6_pq raid1 raid0 multipath linear [18075576.538246] CPU: 6 PID: 6 Comm: kworker/u16:0 Not tainted 3.15.0-0-generic #1~lp1314274 [18075576.538260] Workqueue: netns cleanup_net [18075576.538267] task: ffff8801b3a04440 ti: ffff8801b3a0a000 task.ti: ffff8801b3a0a000 [18075576.538274] RIP: e030:[<ffffffffa013d1a1>] [<ffffffffa013d1a1>] nf_nat_cleanup_conntrack+0x41/0x70 [nf_nat] [18075576.538285] RSP: e02b:ffff8801b3a0bc00 EFLAGS: 00010246 [18075576.538291] RAX: 0000000000000000 RBX: ffff8800eee261b0 RCX: 00000000040003fe [18075576.538299] RDX: ffffc900038ebac8 RSI: 000000000000035c RDI: ffffffffa0141100 [18075576.538305] RBP: ffff8801b3a0bc08 R08: 0000000000000000 R09: 0000000000000000 [18075576.538312] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8800eee26100 [18075576.538319] R13: ffff8801b238c000 R14: 000000000004c2b8 R15: ffff8801b238c048 [18075576.538330] FS: 00007f3bdf8d8740(0000) GS:ffff8801bed80000(0000) knlGS:0000000000000000 [18075576.538337] CS: e033 DS: 0000 ES: 0000 CR0: 000000008005003b [18075576.538343] CR2: ffffc900038ebac8 CR3: 000000008c774000 CR4: 0000000000002660 [18075576.538350] Stack: [18075576.538354] 0000000000000001 ffff8801b3a0bc38 ffffffffa00ce852 ffffffffa00ce813 [18075576.538364] ffff8801b238c000 ffff8801b20b8000 ffff8801b238c000 ffff8801b3a0bc58 [18075576.538374] ffffffffa00c5415 ffff8801b238c000 ffff8801b20b8000 ffff8801b3a0bc80 [18075576.538384] Call Trace: [18075576.538399] [<ffffffffa00ce852>] __nf_ct_ext_destroy+0x72/0xa0 [nf_conntrack] [18075576.538413] [<ffffffffa00ce813>] ? __nf_ct_ext_destroy+0x33/0xa0 [nf_conntrack] [18075576.538424] [<ffffffffa00c5415>] nf_conntrack_free+0x25/0x60 [nf_conntrack] [18075576.538435] [<ffffffffa00c706d>] destroy_conntrack+0xdd/0x130 [nf_conntrack] [18075576.538447] [<ffffffffa00c6fb7>] ? destroy_conntrack+0x27/0x130 [nf_conntrack] [18075576.538458] [<ffffffff8167df55>] nf_conntrack_destroy+0x45/0x70 [18075576.538466] [<ffffffff8167df15>] ? nf_conntrack_destroy+0x5/0x70 [18075576.538477] [<ffffffffa00cb190>] ? nf_conntrack_helper_fini+0x30/0x30 [nf_conntrack] [18075576.538488] [<ffffffffa00c6b53>] nf_ct_iterate_cleanup+0x203/0x230 [nf_conntrack] [18075576.538501] [<ffffffffa00cb32d>] nf_ct_l3proto_pernet_unregister+0x1d/0x20 [nf_conntrack] [18075576.538512] [<ffffffffa00b62f9>] ipv4_net_exit+0x19/0x50 [nf_conntrack_ipv4] [18075576.538522] [<ffffffff81642539>] ops_exit_list.isra.1+0x39/0x60 [18075576.538530] [<ffffffff81642f28>] cleanup_net+0x108/0x1e0 [18075576.538541] [<ffffffff810838e4>] process_one_work+0x1f4/0x510 [18075576.538548] [<ffffffff81083882>] ? process_one_work+0x192/0x510 [18075576.538556] [<ffffffff810845f1>] worker_thread+0x121/0x3a0 [18075576.538566] [<ffffffff810844d0>] ? manage_workers.isra.24+0x2a0/0x2a0 [18075576.538574] [<ffffffff8108affc>] kthread+0xfc/0x120 [18075576.538581] [<ffffffff8108af00>] ? kthread_create_on_node+0x230/0x230 [18075576.538590] [<ffffffff8176da7c>] ret_from_fork+0x7c/0xb0 [18075576.538596] [<ffffffff8108af00>] ? kthread_create_on_node+0x230/0x230 [18075576.538601] Code: 0f b7 58 12 66 85 db 74 45 48 01 c3 74 40 48 83 7b 10 00 74 39 48 c7 c7 00 11 14 a0 e8 29 6e 62 e1 48 8b 03 48 8b 53 08 48 85 c0 <48> 89 02 74 04 48 89 50 08 48 b8 00 02 20 00 00 00 ad de 48 c7 [18075576.538659] RIP [<ffffffffa013d1a1>] nf_nat_cleanup_conntrack+0x41/0x70 [nf_nat] [18075576.538668] RSP <ffff8801b3a0bc00> [18075576.538672] CR2: ffffc900038ebac8 [18075576.538682] ---[ end trace 0fff0eb21b543ad6 ]--- [18075576.538687] Kernel panic - not syncing: Fatal exception in interrupt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1314274 Title: BUG in nf_nat_cleanup_conntrack To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1314274/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
