[   38.005662]  May be due to missing lock nesting notation
[   38.005662] 
[   38.012560] 4 locks held by kworker/u4:3/1732:
[   38.017119]  #0:  ("%s""netns"){.+.+.+}, at: [<ffffffff8118818e>] process_one_work+0x17e/0x680
[   38.026471]  #1:  (net_cleanup_work){+.+.+.}, at: [<ffffffff8118818e>] process_one_work+0x17e/0x680
[   38.036231]  #2:  (net_mutex){+.+.+.}, at: [<ffffffff81fce58a>] cleanup_net+0x7a/0x270
[   38.044887]  #3:  (&(&nf_conntrack_locks[i])->rlock){+.-...}, at: [<ffffffff8205f36d>] nf_conntrack_lock+0xd/0x50
[   38.055877] 
[   38.055877] stack backtrace:
[   38.060344] CPU: 1 PID: 1732 Comm: kworker/u4:3 Not tainted 4.5.0-rc5-syzkaller #0
[   38.068020] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   38.077348] Workqueue: netns cleanup_net
[   38.081502]  0000000000000000 ffff880215007b10 ffffffff81813bf0 ffffffff839568d0
[   38.089507]  ffff8802157a05c0 ffff880215007bf0 ffffffff811bcb2f 0002259100000001
[   38.097495]  0000000000000286 ffffffff83f337e8 ffff880215007b48 ffffffff838f4920
[   38.105524] Call Trace:
[   38.108084]  [<ffffffff81813bf0>] dump_stack+0x99/0xd9
[   38.113369]  [<ffffffff811bcb2f>] __lock_acquire+0x1a8f/0x1c60
[   38.119345]  [<ffffffff811d7a1d>] ? debug_lockdep_rcu_enabled+0x1d/0x20
[   38.126073]  [<ffffffff811bd737>] lock_acquire+0xe7/0x210
[   38.131588]  [<ffffffff8205f36d>] ? nf_conntrack_lock+0xd/0x50
[   38.137536]  [<ffffffff824c3bd3>] _raw_spin_lock+0x33/0x50
[   38.143143]  [<ffffffff8205f36d>] ? nf_conntrack_lock+0xd/0x50
[   38.149083]  [<ffffffff8205f36d>] nf_conntrack_lock+0xd/0x50
[   38.154951]  [<ffffffff820784ec>] ctnl_untimeout.isra.4+0xdc/0x110
[   38.161280]  [<ffffffff82078548>] cttimeout_net_exit+0x28/0x80
[   38.167239]  [<ffffffff81fcd433>] ops_exit_list.isra.4+0x33/0x60
[   38.173355]  [<ffffffff81fce6b9>] cleanup_net+0x1a9/0x270
[   38.178876]  [<ffffffff81188225>] process_one_work+0x215/0x680
[   38.184835]  [<ffffffff8118818e>] ? process_one_work+0x17e/0x680
[   38.191055]  [<ffffffff811886d9>] worker_thread+0x49/0x490
[   38.196653]  [<ffffffff81188690>] ? process_one_work+0x680/0x680
[   38.202795]  [<ffffffff81188690>] ? process_one_work+0x680/0x680
[   38.208924]  [<ffffffff8118f3b9>] kthread+0xf9/0x110
[   38.214011]  [<ffffffff8118f2c0>] ? kthread_create_on_node+0x220/0x220
[   38.220649]  [<ffffffff824c4c2f>] ret_from_fork+0x3f/0x70
[   38.226156]  [<ffffffff8118f2c0>] ? kthread_create_on_node+0x220/0x220
Warning: Permanently added '10.128.15.205' (ECDSA) to the list of known hosts.
2019/11/24 19:04:24 parsed 1 programs
2019/11/24 19:04:24 executed programs: 0
[  124.808246] BUG: spinlock lockup suspected on CPU#1, kworker/u4:3/1732
[  124.814996]  lock: nf_conntrack_locks+0x0/0xe000, .magic: dead4ead, .owner: kworker/u4:3/1732, .owner_cpu: 1
[  124.824970] CPU: 1 PID: 1732 Comm: kworker/u4:3 Not tainted 4.5.0-rc5-syzkaller #0
[  124.832655] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  124.841989] Workqueue: netns cleanup_net
[  124.846139]  0000000000000000 ffff880215007c10 ffffffff81813bf0 ffff8802157a05c0
[  124.854269]  ffffffff82e0a780 ffff880215007c30 ffffffff811c0fe3 ffffffff82e0a780
[  124.862396]  0000000089173700 ffff880215007c60 ffffffff811c110b ffffffff82e0a780
[  124.870379] Call Trace:
[  124.872939]  [<ffffffff81813bf0>] dump_stack+0x99/0xd9
[  124.878195]  [<ffffffff811c0fe3>] spin_dump+0x73/0xc0
[  124.883355]  [<ffffffff811c110b>] do_raw_spin_lock+0x9b/0x160
[  124.889213]  [<ffffffff824c3bdb>] _raw_spin_lock+0x3b/0x50
[  124.894808]  [<ffffffff8205f36d>] ? nf_conntrack_lock+0xd/0x50
[  124.900747]  [<ffffffff8205f36d>] nf_conntrack_lock+0xd/0x50
[  124.906513]  [<ffffffff820784ec>] ctnl_untimeout.isra.4+0xdc/0x110
[  124.912813]  [<ffffffff82078548>] cttimeout_net_exit+0x28/0x80
[  124.918757]  [<ffffffff81fcd433>] ops_exit_list.isra.4+0x33/0x60
[  124.924870]  [<ffffffff81fce6b9>] cleanup_net+0x1a9/0x270
[  124.930379]  [<ffffffff81188225>] process_one_work+0x215/0x680
[  124.936339]  [<ffffffff8118818e>] ? process_one_work+0x17e/0x680
[  124.942467]  [<ffffffff811886d9>] worker_thread+0x49/0x490
[  124.948063]  [<ffffffff81188690>] ? process_one_work+0x680/0x680
[  124.954176]  [<ffffffff81188690>] ? process_one_work+0x680/0x680
[  124.960306]  [<ffffffff8118f3b9>] kthread+0xf9/0x110
[  124.965377]  [<ffffffff8118f2c0>] ? kthread_create_on_node+0x220/0x220
[  124.972011]  [<ffffffff824c4c2f>] ret_from_fork+0x3f/0x70
[  124.977515]  [<ffffffff8118f2c0>] ? kthread_create_on_node+0x220/0x220
[  124.984203] Sending NMI to all CPUs:
[  124.987987] NMI backtrace for cpu 0
[  124.991595] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.5.0-rc5-syzkaller #0
[  124.998761] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  125.008096] task: ffffffff82e21540 ti: ffffffff82e00000 task.ti: ffffffff82e00000
[  125.015696] RIP: 0010:[<ffffffff810c4676>]  [<ffffffff810c4676>] native_safe_halt+0x6/0x10
[  125.024091] RSP: 0018:ffffffff82e03eb8  EFLAGS: 00000282
[  125.029520] RAX: 0000000000000000 RBX: ffffffff82e00000 RCX: 0000000000000000
[  125.036773] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff81088779
[  125.044038] RBP: ffffffff82e03eb8 R08: 0000000000000000 R09: 0000000000000001
[  125.051289] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[  125.058540] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff82e00000
[  125.065803] FS:  0000000000000000(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
[  125.074023] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  125.079884] CR2: 000000c420447ff8 CR3: 0000000213184000 CR4: 00000000001406f0
[  125.087134] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  125.094386] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  125.101655] Stack:
[  125.103787]  ffffffff82e03ed8 ffffffff8108878c ffffffff82e00000 ffffffff82e04000
[  125.111298]  ffffffff82e03ee8 ffffffff8108915a ffffffff82e03ef8 ffffffff811b4b95
[  125.118808]  ffffffff82e03f40 ffffffff811b4fb5 ffffffff82e04000 5fc487f0d21a4870
[  125.126322] Call Trace:
[  125.128884]  [<ffffffff8108878c>] default_idle+0x2c/0x1a0
[  125.134525]  [<ffffffff8108915a>] arch_cpu_idle+0xa/0x10
[  125.139974]  [<ffffffff811b4b95>] default_idle_call+0x25/0x50
[  125.145843]  [<ffffffff811b4fb5>] cpu_startup_entry+0x3f5/0x480
[  125.151883]  [<ffffffff824baf55>] rest_init+0x135/0x140
[  125.157228]  [<ffffffff8304fff0>] start_kernel+0x4a6/0x4b3
[  125.162832]  [<ffffffff8304f120>] ? early_idt_handler_array+0x120/0x120
[  125.169625]  [<ffffffff8304f345>] x86_64_start_reservations+0x2a/0x2c
[  125.176183]  [<ffffffff8304f48c>] x86_64_start_kernel+0x145/0x152
[  125.182527] Code: 00 00 00 00 00 55 48 89 e5 fa 5d c3 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 fb 5d c3 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 fb f4 <5d> c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 f4 5d c3 66 0f 1f 84 
[  125.201507] NMI backtrace for cpu 1
[  125.205127] CPU: 1 PID: 1732 Comm: kworker/u4:3 Not tainted 4.5.0-rc5-syzkaller #0
[  125.212824] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  125.222176] Workqueue: netns cleanup_net
[  125.226217] task: ffff8802157a05c0 ti: ffff880215004000 task.ti: ffff880215004000
[  125.233818] RIP: 0010:[<ffffffff810c4a66>]  [<ffffffff810c4a66>] native_write_msr_safe+0x6/0x40
[  125.242632] RSP: 0018:ffff880215007b68  EFLAGS: 00000086
[  125.248081] RAX: 0000000000000400 RBX: ffffffff8301d5e0 RCX: 0000000000000830
[  125.255594] RDX: 0000000000000001 RSI: 0000000000000400 RDI: 0000000000000830
[  125.262848] RBP: ffff880215007b70 R08: 0000000000000400 R09: 0000000000000003
[  125.270099] R10: ffffffff83239408 R11: 0000000000000001 R12: 0000000000080000
[  125.277352] R13: 0000000000000001 R14: 0000000000000001 R15: 000000000000a130
[  125.284618] FS:  0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
[  125.292827] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  125.298708] CR2: 00007f0c9c188150 CR3: 0000000002e1a000 CR4: 00000000001406e0
[  125.305965] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  125.313231] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  125.320485] Stack:
[  125.322631]  ffffffff810beb4a ffff880215007bb8 ffffffff810bebff 0000000000000282
[  125.330146]  0000000200000010 0000000000011440 0000000000000001 ffffffff810bb810
[  125.337662]  0000000089173700 0000000000000001 ffff880215007bc8 ffffffff810becce
[  125.345190] Call Trace:
[  125.347767]  [<ffffffff810beb4a>] ? __x2apic_send_IPI_dest.constprop.7+0x3a/0x40
[  125.355280]  [<ffffffff810bebff>] __x2apic_send_IPI_mask+0xaf/0x120
[  125.361678]  [<ffffffff810bb810>] ? irq_force_complete_move+0xe0/0xe0
[  125.368256]  [<ffffffff810becce>] x2apic_send_IPI_mask+0xe/0x10
[  125.374295]  [<ffffffff810bb826>] nmi_raise_cpu_backtrace+0x16/0x20
[  125.380682]  [<ffffffff818184d3>] nmi_trigger_all_cpu_backtrace+0x243/0x250
[  125.387787]  [<ffffffff810bb884>] arch_trigger_all_cpu_backtrace+0x14/0x20
[  125.394791]  [<ffffffff811c1115>] do_raw_spin_lock+0xa5/0x160
[  125.400715]  [<ffffffff824c3bdb>] _raw_spin_lock+0x3b/0x50
[  125.406323]  [<ffffffff8205f36d>] ? nf_conntrack_lock+0xd/0x50
[  125.412276]  [<ffffffff8205f36d>] nf_conntrack_lock+0xd/0x50
[  125.418109]  [<ffffffff820784ec>] ctnl_untimeout.isra.4+0xdc/0x110
[  125.424409]  [<ffffffff82078548>] cttimeout_net_exit+0x28/0x80
[  125.431327]  [<ffffffff81fcd433>] ops_exit_list.isra.4+0x33/0x60
[  125.437449]  [<ffffffff81fce6b9>] cleanup_net+0x1a9/0x270
[  125.442964]  [<ffffffff81188225>] process_one_work+0x215/0x680
[  125.448954]  [<ffffffff8118818e>] ? process_one_work+0x17e/0x680
[  125.455078]  [<ffffffff811886d9>] worker_thread+0x49/0x490
[  125.460679]  [<ffffffff81188690>] ? process_one_work+0x680/0x680
[  125.466804]  [<ffffffff81188690>] ? process_one_work+0x680/0x680
[  125.472967]  [<ffffffff8118f3b9>] kthread+0xf9/0x110
[  125.478050]  [<ffffffff8118f2c0>] ? kthread_create_on_node+0x220/0x220
[  125.484729]  [<ffffffff824c4c2f>] ret_from_fork+0x3f/0x70
[  125.490243]  [<ffffffff8118f2c0>] ? kthread_create_on_node+0x220/0x220
[  125.496886] Code: 5b 5d c3 48 c1 e2 20 48 89 d3 31 d2 48 09 c3 48 89 de e8 6e 84 78 00 48 89 d8 5b 5d c3 0f 1f 84 00 00 00 00 00 89 f0 89 f9 0f 30 <31> c0 0f 1f 44 00 00 c3 55 41 89 f0 48 89 d6 48 c1 e6 20 89 c2