The problem also occurs with the mainline v3.15-rc2-trusty build:
[17345307.967478] BUG: unable to handle kernel paging request at ffffc90003777a70 [17345307.967497] IP: [<ffffffffa013f0b6>] nf_nat_cleanup_conntrack+0x46/0x70 [nf_nat] [17345307.967510] PGD 1b6425067 PUD 1b6426067 PMD 1b0aed067 PTE 0 [17345307.967519] Oops: 0002 [#1] SMP [17345307.967525] 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 [17345307.967578] CPU: 0 PID: 6 Comm: kworker/u16:0 Not tainted 3.15.0-031500rc2-generic #201404201435 [17345307.967591] Workqueue: netns cleanup_net [17345307.967596] task: ffff8801b39d0000 ti: ffff8801b39cc000 task.ti: ffff8801b39cc000 [17345307.967601] RIP: e030:[<ffffffffa013f0b6>] [<ffffffffa013f0b6>] nf_nat_cleanup_conntrack+0x46/0x70 [nf_nat] [17345307.967611] RSP: e02b:ffff8801b39cdc48 EFLAGS: 00010246 [17345307.967617] RAX: 0000000000000000 RBX: ffff8801b1cf7b10 RCX: ffff880003110000 [17345307.967624] RDX: ffffc90003777a70 RSI: 0000000000000200 RDI: ffffffffa01434e0 [17345307.967630] RBP: ffff8801b39cdc58 R08: 0000000058690aeb R09: 00000000e834b0f3 [17345307.967636] R10: ffff880003110070 R11: 0000000000000002 R12: ffff8801b1cf7a80 [17345307.967643] R13: ffff880003110000 R14: 0000000000000000 R15: 0000000000000000 [17345307.967655] FS: 00007fd6682cc740(0000) GS:ffff8801bec00000(0000) knlGS:0000000000000000 [17345307.967662] CS: e033 DS: 0000 ES: 0000 CR0: 000000008005003b [17345307.967667] CR2: ffffc90003777a70 CR3: 00000000058f9000 CR4: 0000000000002660 [17345307.967673] Stack: [17345307.967677] ffffffff8176ce52 0000000000000001 ffff8801b39cdc88 ffffffffa00d1013 [17345307.967686] 0000000000000000 ffff880003110000 ffff8800ca7b8000 ffffffffa00e5140 [17345307.967694] ffff8801b39cdca8 ffffffffa00c867e ffff880003110000 ffff8800ca7b8000 [17345307.967703] Call Trace: [17345307.967712] [<ffffffff8176ce52>] ? _raw_spin_lock+0x12/0x50 [17345307.967726] [<ffffffffa00d1013>] __nf_ct_ext_destroy+0x43/0x60 [nf_conntrack] [17345307.967736] [<ffffffffa00c867e>] nf_conntrack_free+0x2e/0x70 [nf_conntrack] [17345307.967746] [<ffffffffa00c946e>] destroy_conntrack+0x9e/0xf0 [nf_conntrack] [17345307.967756] [<ffffffffa00cdc40>] ? nf_conntrack_helper_fini+0x30/0x30 [nf_conntrack] [17345307.967766] [<ffffffff81686617>] nf_conntrack_destroy+0x17/0x20 [17345307.967775] [<ffffffffa00c9358>] nf_ct_iterate_cleanup+0x78/0xb0 [nf_conntrack] [17345307.967786] [<ffffffffa00cdd1d>] nf_ct_l3proto_pernet_unregister+0x1d/0x20 [nf_conntrack] [17345307.967796] [<ffffffffa00e355d>] ipv4_net_exit+0x1d/0x60 [nf_conntrack_ipv4] [17345307.967804] [<ffffffff8164b918>] ops_exit_list.isra.1+0x38/0x60 [17345307.967811] [<ffffffff8164c222>] cleanup_net+0x112/0x230 [17345307.967820] [<ffffffff81085e2f>] process_one_work+0x17f/0x4c0 [17345307.967827] [<ffffffff81086d7b>] worker_thread+0x11b/0x3d0 [17345307.967833] [<ffffffff81086c60>] ? manage_workers.isra.21+0x190/0x190 [17345307.967841] [<ffffffff8108de69>] kthread+0xc9/0xe0 [17345307.967846] [<ffffffff8108dda0>] ? flush_kthread_worker+0xb0/0xb0 [17345307.967854] [<ffffffff8177647c>] ret_from_fork+0x7c/0xb0 [17345307.967860] [<ffffffff8108dda0>] ? flush_kthread_worker+0xb0/0xb0 [17345307.967865] Code: b7 58 12 66 85 db 74 46 0f b7 db 48 01 c3 48 83 7b 10 00 74 39 48 c7 c7 e0 34 14 a0 e8 14 db 62 e1 48 8b 03 48 8b 53 08 48 85 c0 <48> 89 02 74 04 48 89 50 08 48 ba 00 02 20 00 00 00 ad de 48 c7 [17345307.967917] RIP [<ffffffffa013f0b6>] nf_nat_cleanup_conntrack+0x46/0x70 [nf_nat] [17345307.967925] RSP <ffff8801b39cdc48> [17345307.967928] CR2: ffffc90003777a70 [17345307.967933] ---[ end trace 84d4f3185a40459f ]--- [17345307.967938] Kernel panic - not syncing: Fatal exception in interrupt
The problem also occurs with the mainline v3.15-rc2-trusty build:
[17345307.967478] BUG: unable to handle kernel paging request at ffffc90003777a70 0b6>] nf_nat_ cleanup_ conntrack+ 0x46/0x70 [nf_nat] 031500rc2- generic #201404201435 ffffffffa013f0b 6>] [<ffffffffa013f 0b6>] nf_nat_ cleanup_ conntrack+ 0x46/0x70 [nf_nat] 9cdc48 EFLAGS: 00010246 0(0000) GS:ffff8801bec0 0000(0000) knlGS:000000000 0000000 e52>] ? _raw_spin_ lock+0x12/ 0x50 013>] __nf_ct_ ext_destroy+ 0x43/0x60 [nf_conntrack] 67e>] nf_conntrack_ free+0x2e/ 0x70 [nf_conntrack] 46e>] destroy_ conntrack+ 0x9e/0xf0 [nf_conntrack] c40>] ? nf_conntrack_ helper_ fini+0x30/ 0x30 [nf_conntrack] 617>] nf_conntrack_ destroy+ 0x17/0x20 358>] nf_ct_iterate_ cleanup+ 0x78/0xb0 [nf_conntrack] d1d>] nf_ct_l3proto_ pernet_ unregister+ 0x1d/0x20 [nf_conntrack] 55d>] ipv4_net_ exit+0x1d/ 0x60 [nf_conntrack_ipv4] 918>] ops_exit_ list.isra. 1+0x38/ 0x60 222>] cleanup_ net+0x112/ 0x230 e2f>] process_ one_work+ 0x17f/0x4c0 d7b>] worker_ thread+ 0x11b/0x3d0 c60>] ? manage_ workers. isra.21+ 0x190/0x190 e69>] kthread+0xc9/0xe0 da0>] ? flush_kthread_ worker+ 0xb0/0xb0 47c>] ret_from_ fork+0x7c/ 0xb0 da0>] ? flush_kthread_ worker+ 0xb0/0xb0 0b6>] nf_nat_ cleanup_ conntrack+ 0x46/0x70 [nf_nat]
[17345307.967497] IP: [<ffffffffa013f
[17345307.967510] PGD 1b6425067 PUD 1b6426067 PMD 1b0aed067 PTE 0
[17345307.967519] Oops: 0002 [#1] SMP
[17345307.967525] 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
[17345307.967578] CPU: 0 PID: 6 Comm: kworker/u16:0 Not tainted 3.15.0-
[17345307.967591] Workqueue: netns cleanup_net
[17345307.967596] task: ffff8801b39d0000 ti: ffff8801b39cc000 task.ti: ffff8801b39cc000
[17345307.967601] RIP: e030:[<
[17345307.967611] RSP: e02b:ffff8801b3
[17345307.967617] RAX: 0000000000000000 RBX: ffff8801b1cf7b10 RCX: ffff880003110000
[17345307.967624] RDX: ffffc90003777a70 RSI: 0000000000000200 RDI: ffffffffa01434e0
[17345307.967630] RBP: ffff8801b39cdc58 R08: 0000000058690aeb R09: 00000000e834b0f3
[17345307.967636] R10: ffff880003110070 R11: 0000000000000002 R12: ffff8801b1cf7a80
[17345307.967643] R13: ffff880003110000 R14: 0000000000000000 R15: 0000000000000000
[17345307.967655] FS: 00007fd6682cc74
[17345307.967662] CS: e033 DS: 0000 ES: 0000 CR0: 000000008005003b
[17345307.967667] CR2: ffffc90003777a70 CR3: 00000000058f9000 CR4: 0000000000002660
[17345307.967673] Stack:
[17345307.967677] ffffffff8176ce52 0000000000000001 ffff8801b39cdc88 ffffffffa00d1013
[17345307.967686] 0000000000000000 ffff880003110000 ffff8800ca7b8000 ffffffffa00e5140
[17345307.967694] ffff8801b39cdca8 ffffffffa00c867e ffff880003110000 ffff8800ca7b8000
[17345307.967703] Call Trace:
[17345307.967712] [<ffffffff8176c
[17345307.967726] [<ffffffffa00d1
[17345307.967736] [<ffffffffa00c8
[17345307.967746] [<ffffffffa00c9
[17345307.967756] [<ffffffffa00cd
[17345307.967766] [<ffffffff81686
[17345307.967775] [<ffffffffa00c9
[17345307.967786] [<ffffffffa00cd
[17345307.967796] [<ffffffffa00e3
[17345307.967804] [<ffffffff8164b
[17345307.967811] [<ffffffff8164c
[17345307.967820] [<ffffffff81085
[17345307.967827] [<ffffffff81086
[17345307.967833] [<ffffffff81086
[17345307.967841] [<ffffffff8108d
[17345307.967846] [<ffffffff8108d
[17345307.967854] [<ffffffff81776
[17345307.967860] [<ffffffff8108d
[17345307.967865] Code: b7 58 12 66 85 db 74 46 0f b7 db 48 01 c3 48 83 7b 10 00 74 39 48 c7 c7 e0 34 14 a0 e8 14 db 62 e1 48 8b 03 48 8b 53 08 48 85 c0 <48> 89 02 74 04 48 89 50 08 48 ba 00 02 20 00 00 00 ad de 48 c7
[17345307.967917] RIP [<ffffffffa013f
[17345307.967925] RSP <ffff8801b39cdc48>
[17345307.967928] CR2: ffffc90003777a70
[17345307.967933] ---[ end trace 84d4f3185a40459f ]---
[17345307.967938] Kernel panic - not syncing: Fatal exception in interrupt