[ 37.119703] CPU: 1 PID: 2716 Comm: kworker/u4:4 Not tainted 4.5.0-rc3-syzkaller #0 [ 37.127380] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.136707] Workqueue: netns cleanup_net [ 37.140882] 0000000000000000 ffff8800b84c3b20 ffffffff8195cc30 ffffffff83e2b1b0 [ 37.148894] ffffffff83e2b1b0 ffff8800b84c3bf8 ffffffff811bf25c ffff8800b84c3bc0 [ 37.156895] 0000000000000082 0000000000000001 0000000000000000 ffff8800b84c3b60 [ 37.164889] Call Trace: [ 37.167447] [] dump_stack+0x99/0xd9 [ 37.172704] [] __lock_acquire+0x1a5c/0x1ba0 [ 37.178647] [] ? debug_lockdep_rcu_enabled+0x1d/0x20 [ 37.185368] [] lock_acquire+0xed/0x210 [ 37.190875] [] ? nf_conntrack_lock+0xd/0x50 [ 37.196819] [] _raw_spin_lock+0x36/0x50 [ 37.202423] [] ? nf_conntrack_lock+0xd/0x50 [ 37.208362] [] nf_conntrack_lock+0xd/0x50 [ 37.214136] [] ctnl_untimeout.isra.4+0xdc/0x110 [ 37.220424] [] cttimeout_net_exit+0x28/0x80 [ 37.226392] [] ops_exit_list.isra.4+0x33/0x60 [ 37.232512] [] cleanup_net+0x1a9/0x270 [ 37.238025] [] process_one_work+0x21b/0x690 [ 37.243968] [] ? process_one_work+0x17e/0x690 [ 37.250109] [] worker_thread+0x49/0x490 [ 37.255714] [] ? process_one_work+0x690/0x690 [ 37.261832] [] ? process_one_work+0x690/0x690 [ 37.268001] [] kthread+0xea/0x100 [ 37.273081] [] ? kthread_create_on_node+0x1f0/0x1f0 [ 37.279723] [] ret_from_fork+0x3f/0x70 [ 37.285318] [] ? kthread_create_on_node+0x1f0/0x1f0 Warning: Permanently added '10.128.15.197' (ECDSA) to the list of known hosts. 2019/12/06 16:31:09 parsed 1 programs 2019/12/06 16:31:09 executed programs: 0 [ 42.481645] IPv6: ADDRCONF(NETDEV_CHANGE): nr2: link becomes ready [ 42.488802] IPv6: ADDRCONF(NETDEV_CHANGE): nr0: link becomes ready [ 42.498784] IPv6: ADDRCONF(NETDEV_CHANGE): nr1: link becomes ready [ 42.505831] IPv6: ADDRCONF(NETDEV_CHANGE): nr4: link becomes ready [ 42.515097] IPv6: ADDRCONF(NETDEV_CHANGE): nr3: link becomes ready [ 42.522069] IPv6: ADDRCONF(NETDEV_CHANGE): nr5: link becomes ready [ 139.735258] BUG: spinlock lockup suspected on CPU#1, kworker/u4:4/2716 [ 139.741959] lock: nf_conntrack_locks+0x0/0xe000, .magic: dead4ead, .owner: kworker/u4:4/2716, .owner_cpu: 1 [ 139.751912] CPU: 1 PID: 2716 Comm: kworker/u4:4 Not tainted 4.5.0-rc3-syzkaller #0 [ 139.759604] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 139.768934] Workqueue: netns cleanup_net [ 139.773098] 0000000000000000 ffff8800b84c3c18 ffffffff8195cc30 ffff8800b84aa640 [ 139.781109] ffffffff8320a780 ffff8800b84c3c38 ffffffff811c3753 ffffffff8320a780 [ 139.789103] 0000000089173700 ffff8800b84c3c68 ffffffff811c3883 ffffffff8320a780 [ 139.797100] Call Trace: [ 139.799668] [] dump_stack+0x99/0xd9 [ 139.804917] [] spin_dump+0x73/0xc0 [ 139.810078] [] do_raw_spin_lock+0xa3/0x160 [ 139.815932] [] _raw_spin_lock+0x3e/0x50 [ 139.821526] [] ? nf_conntrack_lock+0xd/0x50 [ 139.827475] [] nf_conntrack_lock+0xd/0x50 [ 139.833255] [] ctnl_untimeout.isra.4+0xdc/0x110 [ 139.839556] [] cttimeout_net_exit+0x28/0x80 [ 139.845514] [] ops_exit_list.isra.4+0x33/0x60 [ 139.851631] [] cleanup_net+0x1a9/0x270 [ 139.857160] [] process_one_work+0x21b/0x690 [ 139.863101] [] ? process_one_work+0x17e/0x690 [ 139.869216] [] worker_thread+0x49/0x490 [ 139.874809] [] ? process_one_work+0x690/0x690 [ 139.880933] [] ? process_one_work+0x690/0x690 [ 139.887072] [] kthread+0xea/0x100 [ 139.892154] [] ? kthread_create_on_node+0x1f0/0x1f0 [ 139.898789] [] ret_from_fork+0x3f/0x70 [ 139.904307] [] ? kthread_create_on_node+0x1f0/0x1f0 [ 139.910963] Sending NMI to all CPUs: [ 139.914760] NMI backtrace for cpu 0 [ 139.918358] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.5.0-rc3-syzkaller #0 [ 139.925527] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 139.934862] task: ffffffff83221540 ti: ffffffff83200000 task.ti: ffffffff83200000 [ 139.942450] RIP: 0010:[] [] native_safe_halt+0x6/0x10 [ 139.950830] RSP: 0018:ffffffff83203eb8 EFLAGS: 00000282 [ 139.956259] RAX: 0000000000000000 RBX: ffffffff83200000 RCX: 0000000000000000 [ 139.963498] RDX: 0000000000000000 RSI: ffffffff82f6dda2 RDI: ffffffff81089bf6 [ 139.970749] RBP: ffffffff83203eb8 R08: 0000000000000000 R09: 0000000000000001 [ 139.978011] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff83204000 [ 139.985266] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff83200000 [ 139.992512] FS: 0000000000000000(0000) GS:ffff88012c000000(0000) knlGS:0000000000000000 [ 140.000729] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 140.006602] CR2: 000000c4200b1ff8 CR3: 00000000b5c9f000 CR4: 00000000001406f0 [ 140.013843] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 140.021094] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 140.028345] Stack: [ 140.030477] ffffffff83203ed8 ffffffff81089c09 ffffffff83200000 ffffffff83204000 [ 140.037997] ffffffff83203ee8 ffffffff8108a61a ffffffff83203ef8 ffffffff811b6f45 [ 140.045507] ffffffff83203f40 ffffffff811b733f ffffffff835922e0 ffffffff83204000 [ 140.053012] Call Trace: [ 140.055587] [] default_idle+0x29/0x190 [ 140.061200] [] arch_cpu_idle+0xa/0x10 [ 140.066641] [] default_idle_call+0x25/0x50 [ 140.072510] [] cpu_startup_entry+0x3cf/0x460 [ 140.078573] [] rest_init+0x131/0x140 [ 140.083910] [] start_kernel+0x44a/0x457 [ 140.089515] [] ? early_idt_handler_array+0x120/0x120 [ 140.096296] [] x86_64_start_reservations+0x2a/0x2c [ 140.102852] [] x86_64_start_kernel+0x145/0x152 [ 140.109081] 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 [ 140.128094] NMI backtrace for cpu 1 [ 140.131690] CPU: 1 PID: 2716 Comm: kworker/u4:4 Not tainted 4.5.0-rc3-syzkaller #0 [ 140.139377] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 140.148712] Workqueue: netns cleanup_net [ 140.152741] task: ffff8800b84aa640 ti: ffff8800b84c0000 task.ti: ffff8800b84c0000 [ 140.160344] RIP: 0010:[] [] native_write_msr_safe+0x6/0x40 [ 140.169156] RSP: 0018:ffff8800b84c3b68 EFLAGS: 00000086 [ 140.174636] RAX: 0000000000000400 RBX: ffffffff83471580 RCX: 0000000000000830 [ 140.181882] RDX: 0000000000000001 RSI: 0000000000000400 RDI: 0000000000000830 [ 140.189133] RBP: ffff8800b84c3b70 R08: 0000000000000400 R09: 0000000000000003 [ 140.196384] R10: ffff8800b84aaef0 R11: 0000000000000001 R12: 0000000000080000 [ 140.203628] R13: 0000000000000001 R14: 0000000000000002 R15: 000000000000a130 [ 140.210880] FS: 0000000000000000(0000) GS:ffff88012c100000(0000) knlGS:0000000000000000 [ 140.219086] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 140.224950] CR2: 00007f5fabdd0150 CR3: 000000000321a000 CR4: 00000000001406e0 [ 140.232203] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 140.239503] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 140.246759] Stack: [ 140.248879] ffffffff810c261a ffff8800b84c3bb8 ffffffff810c2701 0000000000000282 [ 140.256398] 0000000000000001 00000000000114e0 0000000000000001 ffffffff810bf280 [ 140.263955] 0000000000000040 0000000000000001 ffff8800b84c3bc8 ffffffff810c27ce [ 140.271478] Call Trace: [ 140.274040] [] ? __x2apic_send_IPI_dest.constprop.7+0x3a/0x40 [ 140.281561] [] __x2apic_send_IPI_mask+0xe1/0x150 [ 140.288101] [] ? irq_force_complete_move+0xe0/0xe0 [ 140.294663] [] x2apic_send_IPI_mask+0xe/0x10 [ 140.300694] [] nmi_raise_cpu_backtrace+0x16/0x20 [ 140.307078] [] nmi_trigger_all_cpu_backtrace+0x322/0x330 [ 140.314150] [] arch_trigger_all_cpu_backtrace+0x14/0x20 [ 140.321142] [] do_raw_spin_lock+0xad/0x160 [ 140.327119] [] _raw_spin_lock+0x3e/0x50 [ 140.332713] [] ? nf_conntrack_lock+0xd/0x50 [ 140.338792] [] nf_conntrack_lock+0xd/0x50 [ 140.344637] [] ctnl_untimeout.isra.4+0xdc/0x110 [ 140.350927] [] cttimeout_net_exit+0x28/0x80 [ 140.356879] [] ops_exit_list.isra.4+0x33/0x60 [ 140.362998] [] cleanup_net+0x1a9/0x270 [ 140.368520] [] process_one_work+0x21b/0x690 [ 140.374470] [] ? process_one_work+0x17e/0x690 [ 140.380584] [] worker_thread+0x49/0x490 [ 140.386233] [] ? process_one_work+0x690/0x690 [ 140.392351] [] ? process_one_work+0x690/0x690 [ 140.398482] [] kthread+0xea/0x100 [ 140.403559] [] ? kthread_create_on_node+0x1f0/0x1f0 [ 140.410203] [] ret_from_fork+0x3f/0x70 [ 140.415782] [] ? kthread_create_on_node+0x1f0/0x1f0 [ 140.422416] Code: 5b 5d c3 48 c1 e2 20 48 89 d3 31 d2 48 09 c3 48 89 de e8 3e f0 8c 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 41 89 f0 48 89 d6 55 89 c2 48 c1 e6 20 [ 141.964422] INFO: rcu_preempt self-detected stall on CPU [ 141.970040] 1-...: (10452 ticks this GP) idle=d87/140000000000001/0 softirq=4998/4998 fqs=10499 [ 141.979024] (t=10501 jiffies g=384 c=383 q=747) [ 141.983964] Task dump for CPU 1: [ 141.987303] kworker/u4:4 R running task 13152 2716 2 0x00000008 [ 141.994730] Workqueue: netns cleanup_net [ 141.998899] ffff8800b84aa640 ffff88012c103da0 ffffffff8119ee63 0000000000000001 [ 142.006920] ffffffff83272b00 0000000000000086 ffff88012c103db8 ffffffff811a1c42 [ 142.014945] 0000000000000002 ffff88012c103de8 ffffffff811db709 ffff88012c117dc0 [ 142.022965] Call Trace: [ 142.025529] [] sched_show_task+0xe3/0x180 [ 142.032044] [] dump_cpu_task+0x32/0x40 [ 142.037556] [] rcu_dump_cpu_stacks+0x89/0xe0 [ 142.043591] [] rcu_check_callbacks+0x66d/0xa30 [ 142.049797] [] ? tick_sched_do_timer+0x30/0x30 [ 142.056002] [] ? tick_sched_do_timer+0x30/0x30 [ 142.062214] [] update_process_times+0x34/0x60 [ 142.068334] [] tick_sched_handle.isra.20+0x20/0x60 [ 142.074886] [] tick_sched_timer+0x38/0x70 [ 142.080659] [] __hrtimer_run_queues+0x11d/0x4a0 [ 142.086950] [] ? hrtimer_interrupt+0x88/0x1b0 [ 142.093068] [] hrtimer_interrupt+0xaa/0x1b0 [ 142.099019] [] local_apic_timer_interrupt+0x31/0x50 [ 142.105658] [] smp_apic_timer_interrupt+0x38/0x50 [ 142.112129] [] apic_timer_interrupt+0x8c/0xa0 [ 142.118246] [] ? kvm_wait+0xbb/0xe0 [ 142.124242] [] ? native_safe_halt+0x6/0x10 [ 142.130212] [] ? trace_hardirqs_on+0xd/0x10 [ 142.136289] [] kvm_wait+0xca/0xe0 [ 142.141369] [] __pv_queued_spin_lock_slowpath+0x26a/0x2d0 [ 142.148532] [] do_raw_spin_lock+0x157/0x160 [ 142.154481] [] _raw_spin_lock+0x3e/0x50 [ 142.160087] [] ? nf_conntrack_lock+0xd/0x50 [ 142.166045] [] nf_conntrack_lock+0xd/0x50 [ 142.171823] [] ctnl_untimeout.isra.4+0xdc/0x110 [ 142.178128] [] cttimeout_net_exit+0x28/0x80 [ 142.184077] [] ops_exit_list.isra.4+0x33/0x60 [ 142.190200] [] cleanup_net+0x1a9/0x270 [ 142.195715] [] process_one_work+0x21b/0x690 [ 142.201668] [] ? process_one_work+0x17e/0x690 [ 142.207807] [] worker_thread+0x49/0x490 [ 142.213420] [] ? process_one_work+0x690/0x690 [ 142.219551] [] ? process_one_work+0x690/0x690 [ 142.225676] [] kthread+0xea/0x100 [ 142.230763] [] ? kthread_create_on_node+0x1f0/0x1f0 [ 142.237411] [] ret_from_fork+0x3f/0x70 [ 142.242925] [] ? kthread_create_on_node+0x1f0/0x1f0 [ 142.249572] INFO: rcu_preempt detected stalls on CPUs/tasks: [ 142.255489] 1-...: (10454 ticks this GP) idle=d87/140000000000000/0 softirq=4998/4998 fqs=10500 [ 142.264470] (detected by 0, t=10502 jiffies, g=384, c=383, q=747) [ 142.270912] Task dump for CPU 1: [ 142.274271] kworker/u4:4 R running task 13152 2716 2 0x00000008 [ 142.281678] Workqueue: netns cleanup_net [ 142.285832] 0000000000000292 ffffffff81003017 0000000000000000 0000000000000000 [ 142.293813] 0000000000000001 0000000000000000 ffff8800b84aa640 ffff88012b78a300 [ 142.301816] ffff88012c117180 ffffffff82f6dda2 0140000000000001 ffffffff826f04b9 [ 142.309800] Call Trace: [ 142.312372] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 142.318926] [] ? retint_kernel+0x2d/0x2d [ 142.324740] [] ? kvm_wait+0xbb/0xe0 [ 142.330003] [] ? native_safe_halt+0x6/0x10 [ 142.335862] [] ? trace_hardirqs_on+0xd/0x10 [ 142.341951] [] ? kvm_wait+0xca/0xe0 [ 142.347202] [] ? __pv_queued_spin_lock_slowpath+0x26a/0x2d0 [ 142.354658] [] ? do_raw_spin_lock+0x157/0x160 [ 142.360821] [] ? _raw_spin_lock+0x3e/0x50 [ 142.366593] [] ? nf_conntrack_lock+0xd/0x50 [ 142.372537] [] ? nf_conntrack_lock+0xd/0x50 [ 142.378482] [] ? ctnl_untimeout.isra.4+0xdc/0x110 [ 142.384943] [] ? cttimeout_net_exit+0x28/0x80 [ 142.391095] [] ? ops_exit_list.isra.4+0x33/0x60 [ 142.397383] [] ? cleanup_net+0x1a9/0x270 [ 142.403063] [] ? process_one_work+0x21b/0x690 [ 142.409233] [] ? process_one_work+0x17e/0x690 [ 142.415347] [] ? worker_thread+0x49/0x490 [ 142.421115] [] ? process_one_work+0x690/0x690 [ 142.427229] [] ? process_one_work+0x690/0x690 [ 142.433345] [] ? kthread+0xea/0x100 [ 142.440773] [] ? kthread_create_on_node+0x1f0/0x1f0 [ 142.447408] [] ? ret_from_fork+0x3f/0x70 [ 142.453100] [] ? kthread_create_on_node+0x1f0/0x1f0