syzkaller login: [ 14.578850] random: nonblocking pool is initialized [ 16.516419] cfg80211: Calling CRDA to update world regulatory domain [ 19.676432] cfg80211: Calling CRDA to update world regulatory domain [ 22.836424] cfg80211: Calling CRDA to update world regulatory domain [ 25.996421] cfg80211: Calling CRDA to update world regulatory domain [ 29.156426] cfg80211: Calling CRDA to update world regulatory domain [ 32.316424] cfg80211: Calling CRDA to update world regulatory domain [ 33.080848] IPVS: Creating netns size=2688 id=1 [ 33.085530] IPVS: ftp: loaded support on port[0] = 21 [ 35.476437] cfg80211: Calling CRDA to update world regulatory domain [ 38.636411] cfg80211: Exceeded CRDA call max attempts. Not calling CRDA Warning: Permanently added '10.128.1.33' (ECDSA) to the list of known hosts. 2019/11/16 11:47:00 parsed 1 programs 2019/11/16 11:47:00 executed programs: 0 [ 40.588197] IPv6: ADDRCONF(NETDEV_CHANGE): nr3: link becomes ready [ 40.594741] IPv6: ADDRCONF(NETDEV_CHANGE): nr5: link becomes ready [ 40.604107] IPv6: ADDRCONF(NETDEV_CHANGE): nr0: link becomes ready [ 40.604289] IPVS: Creating netns size=2688 id=2 [ 40.604300] IPVS: ftp: loaded support on port[0] = 21 [ 40.620834] IPv6: ADDRCONF(NETDEV_CHANGE): nr2: link becomes ready [ 40.630822] IPv6: ADDRCONF(NETDEV_CHANGE): nr4: link becomes ready [ 40.637919] IPVS: Creating netns size=2688 id=3 [ 40.638895] IPv6: ADDRCONF(NETDEV_CHANGE): nr1: link becomes ready [ 40.649234] IPVS: ftp: loaded support on port[0] = 21 [ 40.650180] chnl_net:caif_netlink_parms(): no params data found [ 40.659423] device bridge_slave_0 entered promiscuous mode [ 40.660044] device bridge_slave_1 entered promiscuous mode [ 40.662363] IPv6: ADDRCONF(NETDEV_UP): bond_slave_0: link is not ready [ 40.665542] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 40.686627] IPv6: ADDRCONF(NETDEV_UP): bond_slave_1: link is not ready [ 40.693396] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 40.706510] IPVS: Creating netns size=2688 id=4 [ 40.711240] IPVS: ftp: loaded support on port[0] = 21 [ 40.716139] chnl_net:caif_netlink_parms(): no params data found [ 40.730426] device bridge_slave_0 entered promiscuous mode [ 40.738858] device bridge_slave_1 entered promiscuous mode [ 40.745221] IPVS: Creating netns size=2688 id=5 [ 40.747807] IPv6: ADDRCONF(NETDEV_UP): bond_slave_0: link is not ready [ 40.747923] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 40.748064] IPv6: ADDRCONF(NETDEV_UP): bond_slave_1: link is not ready [ 40.748163] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 40.757991] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 40.758051] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 40.762120] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 40.762155] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 40.763447] bridge0: port 2(bridge_slave_1) entered forwarding state [ 40.763525] bridge0: port 2(bridge_slave_1) entered forwarding state [ 40.763537] bridge0: port 1(bridge_slave_0) entered forwarding state [ 40.763543] bridge0: port 1(bridge_slave_0) entered forwarding state [ 40.831069] bridge0: port 1(bridge_slave_0) entered disabled state [ 40.831145] IPVS: ftp: loaded support on port[0] = 21 [ 40.842870] bridge0: port 2(bridge_slave_1) entered disabled state [ 40.850788] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 40.862021] IPVS: Creating netns size=2688 id=6 [ 40.867577] IPVS: ftp: loaded support on port[0] = 21 [ 40.871932] chnl_net:caif_netlink_parms(): no params data found [ 40.881423] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 40.894224] IPVS: Creating netns size=2688 id=7 [ 40.900901] IPVS: ftp: loaded support on port[0] = 21 [ 40.904818] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 40.904854] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 40.905849] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 40.920025] 8021q: adding VLAN 0 to HW filter on device bond0 [ 40.920336] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 40.937691] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 40.944924] device bridge_slave_0 entered promiscuous mode [ 40.955775] device bridge_slave_1 entered promiscuous mode [ 40.963586] chnl_net:caif_netlink_parms(): no params data found [ 40.978838] IPv6: ADDRCONF(NETDEV_UP): bond_slave_0: link is not ready [ 40.985622] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 40.993311] IPv6: ADDRCONF(NETDEV_UP): bond_slave_1: link is not ready [ 41.000068] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 41.018170] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 41.032111] device bridge_slave_0 entered promiscuous mode [ 41.037940] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 41.045323] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.051809] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.058914] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 41.066205] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.072683] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.079694] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 41.086740] device bridge_slave_1 entered promiscuous mode [ 41.092420] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 41.100465] chnl_net:caif_netlink_parms(): no params data found [ 41.107320] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 41.114689] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 41.121815] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 41.128995] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 41.140219] IPv6: ADDRCONF(NETDEV_UP): bond_slave_0: link is not ready [ 41.147044] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 41.154859] 8021q: adding VLAN 0 to HW filter on device bond0 [ 41.161406] chnl_net:caif_netlink_parms(): no params data found [ 41.170466] IPv6: ADDRCONF(NETDEV_UP): bond_slave_1: link is not ready [ 41.177272] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 41.185208] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 41.194369] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 41.204191] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 41.211640] device bridge_slave_0 entered promiscuous mode [ 41.217664] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 41.228024] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 41.234947] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 41.243843] device bridge_slave_1 entered promiscuous mode [ 41.250124] device bridge_slave_0 entered promiscuous mode [ 41.258852] device bridge_slave_1 entered promiscuous mode [ 41.266329] IPv6: ADDRCONF(NETDEV_UP): bond_slave_0: link is not ready [ 41.273125] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 41.281293] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 41.288601] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.295083] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.301790] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 41.308484] IPv6: ADDRCONF(NETDEV_UP): bond_slave_0: link is not ready [ 41.315226] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 41.323382] IPv6: ADDRCONF(NETDEV_UP): bond_slave_1: link is not ready [ 41.330166] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 41.337964] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 41.344961] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 41.351879] IPv6: ADDRCONF(NETDEV_UP): bond_slave_1: link is not ready [ 41.358676] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 41.373513] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 41.381013] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 41.388121] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 41.395427] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.401913] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.412567] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 41.421348] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 41.430343] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 41.439084] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 41.446036] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 41.455970] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 41.463643] 8021q: adding VLAN 0 to HW filter on device bond0 [ 41.469900] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 41.477307] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 41.483924] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 41.493294] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 41.501494] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.508207] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.514677] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.521168] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.528766] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 41.536879] bridge0: port 1(bridge_slave_0) entered disabled state [ 41.543218] bridge0: port 2(bridge_slave_1) entered disabled state [ 41.550057] 8021q: adding VLAN 0 to HW filter on device bond0 [ 41.556661] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 41.563784] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 41.572797] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 41.582052] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 41.590473] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 41.597300] 8021q: adding VLAN 0 to HW filter on device bond0 [ 41.603536] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 41.610412] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 41.617120] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 41.624405] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.630892] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.637904] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 41.645189] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.651678] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.658681] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 41.666971] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 41.674826] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 41.682013] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 41.689302] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 41.700761] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 41.708218] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 41.716545] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 41.723542] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 41.730831] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 41.738567] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.745038] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.751700] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 41.759005] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.765556] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.772268] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 41.779574] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.786041] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.792622] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 41.800003] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.806491] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.813365] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 41.822219] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 41.829350] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 41.837572] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 41.844646] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 41.853587] 8021q: adding VLAN 0 to HW filter on device bond0 [ 41.862097] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 41.870830] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 41.892278] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 41.899778] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.906248] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.912897] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 41.920625] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.927115] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.934041] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 41.941938] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 41.950998] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 41.962931] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 41.971158] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 56.086491] bridge0: port 1(bridge_slave_0) entered forwarding state [ 56.093023] bridge0: port 2(bridge_slave_1) entered forwarding state [ 56.326388] bridge0: port 1(bridge_slave_0) entered forwarding state [ 56.446368] bridge0: port 2(bridge_slave_1) entered forwarding state [ 56.646382] bridge0: port 1(bridge_slave_0) entered forwarding state [ 56.686386] bridge0: port 2(bridge_slave_1) entered forwarding state [ 56.766390] bridge0: port 1(bridge_slave_0) entered forwarding state [ 56.772912] bridge0: port 2(bridge_slave_1) entered forwarding state [ 56.806382] bridge0: port 1(bridge_slave_0) entered forwarding state [ 56.846390] bridge0: port 2(bridge_slave_1) entered forwarding state [ 56.926386] bridge0: port 1(bridge_slave_0) entered forwarding state [ 56.966393] bridge0: port 2(bridge_slave_1) entered forwarding state [ 282.186428] INFO: task syz-executor.5:5346 blocked for more than 140 seconds. [ 282.193807] Not tainted 4.1.0 #0 [ 282.197676] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 282.205619] syz-executor.5 D ffff8800b168bbb8 12304 5346 1 0x00000004 [ 282.213040] ffff8800b168bbb8 00000000b168bbb8 ffff8800b876ec90 ffff880000000000 [ 282.221053] ffff8800b168c000 ffff8800b15d7660 ffff8800b168bd38 ffff8800b876ec90 [ 282.229059] 0000000000000286 ffff8800b168bbd8 ffffffff826451a2 ffff8800b15d7658 [ 282.237071] Call Trace: [ 282.239625] [] schedule+0x32/0x80 [ 282.244691] [] schedule_preempt_disabled+0x13/0x20 [ 282.251249] [] mutex_lock_nested+0x195/0x610 [ 282.257287] [] ? lookup_slow+0x31/0xc0 [ 282.262878] [] lookup_slow+0x31/0xc0 [ 282.268223] [] link_path_walk+0x688/0x15c0 [ 282.274081] [] ? debug_lockdep_rcu_enabled+0x1d/0x20 [ 282.280819] [] ? _raw_spin_unlock+0x30/0x60 [ 282.286769] [] ? lockref_get+0x1d/0x30 [ 282.292271] [] path_mountpoint+0x2f5/0x490 [ 282.298132] [] ? putname+0x67/0x70 [ 282.303303] [] filename_mountpoint+0x32/0xe0 [ 282.309344] [] user_path_mountpoint_at+0x31/0x40 [ 282.315721] [] SyS_umount+0x67/0x120 [ 282.321069] [] system_call_fastpath+0x16/0x7a [ 282.327202] 1 lock held by syz-executor.5/5346: [ 282.331841] #0: (&type->i_mutex_dir_key#4){+.+.+.}, at: [] lookup_slow+0x31/0xc0 [ 282.341808] sending NMI to all CPUs: [ 282.345557] NMI backtrace for cpu 0 [ 282.349165] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.1.0 #0 [ 282.355117] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 282.364544] task: ffffffff83214520 ti: ffffffff83200000 task.ti: ffffffff83200000 [ 282.372140] RIP: 0010:[] [] native_safe_halt+0x6/0x10 [ 282.380527] RSP: 0018:ffffffff83203e88 EFLAGS: 00000282 [ 282.385947] RAX: ffffffff83214520 RBX: 0000000000000000 RCX: 0000000000000000 [ 282.393197] RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffffffff83214520 [ 282.400457] RBP: ffffffff83203e88 R08: 0000000000000001 R09: 0000000000000000 [ 282.407724] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff83200000 [ 282.414967] R13: ffffffff8341b238 R14: 0000000000000000 R15: ffffffff83200000 [ 282.422238] FS: 0000000000000000(0000) GS:ffff88012c000000(0000) knlGS:0000000000000000 [ 282.430450] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 282.436303] CR2: 00007f805a113140 CR3: 000000012af64000 CR4: 00000000001407f0 [ 282.443554] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 282.450804] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 282.458072] Stack: [ 282.460197] ffffffff83203ea8 ffffffff810896e9 0000000000000000 ffffffff83200000 [ 282.467709] ffffffff83203eb8 ffffffff8108a62a ffffffff83203f28 ffffffff811bd5e9 [ 282.475216] ffffffff83203ed8 ffffffff83204000 ffff88021fffd200 ffffffff83530940 [ 282.482729] Call Trace: [ 282.485284] [] default_idle+0x29/0x270 [ 282.490795] [] arch_cpu_idle+0xa/0x10 [ 282.496214] [] cpu_startup_entry+0x2e9/0x660 [ 282.502250] [] rest_init+0x134/0x140 [ 282.507587] [] start_kernel+0x438/0x445 [ 282.513188] [] ? early_idt_handler_array+0x120/0x120 [ 282.519916] [] x86_64_start_reservations+0x2a/0x2c [ 282.526513] [] x86_64_start_kernel+0x145/0x154 [ 282.532710] 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 [ 282.551683] NMI backtrace for cpu 1 [ 282.555281] CPU: 1 PID: 871 Comm: khungtaskd Not tainted 4.1.0 #0 [ 282.561489] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 282.570821] task: ffff880129d288d0 ti: ffff880129cb8000 task.ti: ffff880129cb8000 [ 282.578421] RIP: 0010:[] [] native_write_msr_safe+0xa/0x10 [ 282.587244] RSP: 0018:ffff880129cbbd08 EFLAGS: 00000082 [ 282.592657] RAX: 0000000000000400 RBX: 0000000000000001 RCX: 0000000000000830 [ 282.599922] RDX: 0000000000000001 RSI: 0000000000000400 RDI: 0000000000000830 [ 282.607175] RBP: ffff880129cbbd08 R08: 0000000000000000 R09: 0000000000000003 [ 282.614413] R10: ffff880129d288d0 R11: 0000000000000001 R12: ffffffff8341ad08 [ 282.621659] R13: 0000000000080000 R14: 0000000000000001 R15: 000000000000a120 [ 282.628906] FS: 0000000000000000(0000) GS:ffff88012c100000(0000) knlGS:0000000000000000 [ 282.637213] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 282.643068] CR2: 00007f805a113140 CR3: 00000000b1f98000 CR4: 00000000001407e0 [ 282.650315] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 282.657562] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 282.664801] Stack: [ 282.666929] ffff880129cbbd68 ffffffff810c502f ffff880129cbbd78 0000000000000296 [ 282.674465] 0000000200000002 0000000000000002 ffff880129cbbd88 0000000000000040 [ 282.681972] 000000000000d3c0 0000000000000001 ffff8800b876ec90 000000000000008c [ 282.689488] Call Trace: [ 282.692047] [] __x2apic_send_IPI_mask+0x10f/0x1a0 [ 282.698514] [] x2apic_send_IPI_mask+0xe/0x10 [ 282.704544] [] arch_trigger_all_cpu_backtrace+0x33d/0x350 [ 282.711711] [] ? lockdep_print_held_locks+0x77/0xe0 [ 282.718400] [] watchdog+0x47e/0x6c0 [ 282.723640] [] ? watchdog+0x8a/0x6c0 [ 282.728975] [] ? __schedule+0x388/0x9e0 [ 282.734578] [] ? reset_hung_task_detector+0x10/0x10 [ 282.741214] [] kthread+0xea/0x100 [ 282.746395] [] ? kthread_create_on_node+0x210/0x210 [ 282.753026] [] ret_from_fork+0x42/0x70 [ 282.758557] [] ? kthread_create_on_node+0x210/0x210 [ 282.765195] Code: 00 55 89 f9 48 89 e5 0f 32 45 31 c0 48 89 d7 44 89 06 89 c6 5d 48 c1 e7 20 48 89 f8 48 09 f0 c3 90 55 89 f0 89 f9 48 89 e5 0f 30 <31> c0 5d c3 66 90 55 89 f9 48 89 e5 0f 33 48 89 d7 89 c1 5d 48 [ 282.784289] Kernel panic - not syncing: hung_task: blocked tasks [ 282.790405] CPU: 1 PID: 871 Comm: khungtaskd Not tainted 4.1.0 #0 [ 282.796600] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 282.805921] 00000000003fff7e ffff880129cbbd58 ffffffff8263cd0b 0000000000000034 [ 282.813906] ffffffff82e3846d ffff880129cbbdd8 ffffffff82638b9e 0000000000000001 [ 282.821880] 0000000000000008 ffff880129cbbde8 ffff880129cbbd88 0000000000000005 [ 282.829862] Call Trace: [ 282.832415] [] dump_stack+0x4f/0x7b [ 282.837657] [] panic+0xcd/0x211 [ 282.842556] [] watchdog+0x48c/0x6c0 [ 282.847813] [] ? watchdog+0x8a/0x6c0 [ 282.853141] [] ? __schedule+0x388/0x9e0 [ 282.858729] [] ? reset_hung_task_detector+0x10/0x10 [ 282.865367] [] kthread+0xea/0x100 [ 282.870439] [] ? kthread_create_on_node+0x210/0x210 [ 282.877069] [] ret_from_fork+0x42/0x70 [ 282.882570] [] ? kthread_create_on_node+0x210/0x210 [ 282.890449] Kernel Offset: disabled