Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 16.520580] cfg80211: Calling CRDA to update world regulatory domain [ 19.680580] cfg80211: Calling CRDA to update world regulatory domain [ 22.840557] cfg80211: Calling CRDA to update world regulatory domain [ 26.000574] cfg80211: Calling CRDA to update world regulatory domain [ 29.160557] cfg80211: Calling CRDA to update world regulatory domain [ 31.098137] IPVS: Creating netns size=2688 id=1 [ 31.102886] IPVS: ftp: loaded support on port[0] = 21 [ 32.320608] cfg80211: Calling CRDA to update world regulatory domain [ 35.480597] cfg80211: Calling CRDA to update world regulatory domain Warning: Permanently added '10.128.0.194' (ECDSA) to the list of known hosts. 2019/11/08 14:58:27 parsed 1 programs 2019/11/08 14:58:27 executed programs: 0 [ 37.650254] IPv6: ADDRCONF(NETDEV_CHANGE): nr0: link becomes ready [ 37.658635] IPv6: ADDRCONF(NETDEV_CHANGE): nr2: link becomes ready [ 37.665293] IPv6: ADDRCONF(NETDEV_CHANGE): nr4: link becomes ready [ 37.671984] IPv6: ADDRCONF(NETDEV_CHANGE): nr3: link becomes ready [ 37.678757] IPv6: ADDRCONF(NETDEV_CHANGE): nr1: link becomes ready [ 37.685522] IPVS: Creating netns size=2688 id=2 [ 37.685893] IPv6: ADDRCONF(NETDEV_CHANGE): nr5: link becomes ready [ 37.696996] IPVS: ftp: loaded support on port[0] = 21 [ 37.707278] IPVS: Creating netns size=2688 id=3 [ 37.712127] IPVS: ftp: loaded support on port[0] = 21 [ 37.717733] chnl_net:caif_netlink_parms(): no params data found [ 37.728729] IPVS: Creating netns size=2688 id=4 [ 37.734364] IPVS: ftp: loaded support on port[0] = 21 [ 37.747587] IPVS: Creating netns size=2688 id=5 [ 37.753319] device bridge_slave_0 entered promiscuous mode [ 37.759663] IPVS: ftp: loaded support on port[0] = 21 [ 37.765083] device bridge_slave_1 entered promiscuous mode [ 37.774908] IPv6: ADDRCONF(NETDEV_UP): bond_slave_0: link is not ready [ 37.782052] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 37.794158] IPVS: Creating netns size=2688 id=6 [ 37.799104] IPVS: ftp: loaded support on port[0] = 21 [ 37.804490] IPv6: ADDRCONF(NETDEV_UP): bond_slave_1: link is not ready [ 37.812256] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 37.824175] chnl_net:caif_netlink_parms(): no params data found [ 37.840261] chnl_net:caif_netlink_parms(): no params data found [ 37.850930] IPVS: Creating netns size=2688 id=7 [ 37.855664] IPVS: ftp: loaded support on port[0] = 21 [ 37.859709] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 37.859776] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 37.865345] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 37.865385] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 37.866706] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 37.881604] 8021q: adding VLAN 0 to HW filter on device bond0 [ 37.881931] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 37.906319] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 37.930978] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 37.938145] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 37.945187] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 37.952943] bridge0: port 1(bridge_slave_0) entered forwarding state [ 37.959458] bridge0: port 1(bridge_slave_0) entered forwarding state [ 37.966797] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 37.974163] bridge0: port 2(bridge_slave_1) entered forwarding state [ 37.980657] bridge0: port 2(bridge_slave_1) entered forwarding state [ 37.987299] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 37.997127] chnl_net:caif_netlink_parms(): no params data found [ 38.006335] device bridge_slave_0 entered promiscuous mode [ 38.012503] device bridge_slave_1 entered promiscuous mode [ 38.020153] IPv6: ADDRCONF(NETDEV_UP): bond_slave_0: link is not ready [ 38.026976] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 38.037161] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 38.044388] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 38.051804] device bridge_slave_0 entered promiscuous mode [ 38.057667] IPv6: ADDRCONF(NETDEV_UP): bond_slave_1: link is not ready [ 38.064636] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 38.072947] chnl_net:caif_netlink_parms(): no params data found [ 38.080251] device bridge_slave_1 entered promiscuous mode [ 38.092583] IPv6: ADDRCONF(NETDEV_UP): bond_slave_0: link is not ready [ 38.099406] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 38.109605] IPv6: ADDRCONF(NETDEV_UP): bond_slave_1: link is not ready [ 38.117450] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 38.137246] device bridge_slave_0 entered promiscuous mode [ 38.144064] device bridge_slave_0 entered promiscuous mode [ 38.151045] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 38.159057] device bridge_slave_1 entered promiscuous mode [ 38.166507] device bridge_slave_1 entered promiscuous mode [ 38.172496] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 38.181275] IPv6: ADDRCONF(NETDEV_UP): bond_slave_0: link is not ready [ 38.188058] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 38.196208] IPv6: ADDRCONF(NETDEV_UP): bond_slave_1: link is not ready [ 38.203095] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 38.214452] chnl_net:caif_netlink_parms(): no params data found [ 38.222615] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 38.232871] IPv6: ADDRCONF(NETDEV_UP): bond_slave_0: link is not ready [ 38.239700] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 38.248650] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 38.255761] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 38.262679] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 38.269388] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 38.276387] IPv6: ADDRCONF(NETDEV_UP): bond_slave_1: link is not ready [ 38.283676] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 38.295451] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 38.311380] device bridge_slave_0 entered promiscuous mode [ 38.317207] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 38.323891] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 38.332238] device bridge_slave_1 entered promiscuous mode [ 38.338224] bridge0: port 2(bridge_slave_1) entered forwarding state [ 38.344862] bridge0: port 2(bridge_slave_1) entered forwarding state [ 38.351404] bridge0: port 1(bridge_slave_0) entered forwarding state [ 38.357883] bridge0: port 1(bridge_slave_0) entered forwarding state [ 38.365998] bridge0: port 2(bridge_slave_1) entered forwarding state [ 38.372540] bridge0: port 2(bridge_slave_1) entered forwarding state [ 38.379014] bridge0: port 1(bridge_slave_0) entered forwarding state [ 38.385504] bridge0: port 1(bridge_slave_0) entered forwarding state [ 38.395086] IPv6: ADDRCONF(NETDEV_UP): bond_slave_0: link is not ready [ 38.402079] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 38.409670] bridge0: port 1(bridge_slave_0) entered disabled state [ 38.416479] bridge0: port 1(bridge_slave_0) entered disabled state [ 38.422900] bridge0: port 2(bridge_slave_1) entered disabled state [ 38.429426] bridge0: port 2(bridge_slave_1) entered disabled state [ 38.436330] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 38.443440] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 38.450233] IPv6: ADDRCONF(NETDEV_UP): bond_slave_1: link is not ready [ 38.457118] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 38.466743] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 38.473761] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 38.484149] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 38.493702] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 38.502710] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 38.510363] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 38.521244] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 38.532173] bridge0: port 2(bridge_slave_1) entered forwarding state [ 38.538709] bridge0: port 2(bridge_slave_1) entered forwarding state [ 38.545440] bridge0: port 1(bridge_slave_0) entered forwarding state [ 38.552089] bridge0: port 1(bridge_slave_0) entered forwarding state [ 38.559720] 8021q: adding VLAN 0 to HW filter on device bond0 [ 38.566402] 8021q: adding VLAN 0 to HW filter on device bond0 [ 38.573299] bridge0: port 1(bridge_slave_0) entered disabled state [ 38.579678] bridge0: port 2(bridge_slave_1) entered disabled state [ 38.586758] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 38.594251] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 38.601328] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 38.607672] 8021q: adding VLAN 0 to HW filter on device bond0 [ 38.614475] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 38.624433] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 38.631548] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 38.638115] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 38.645297] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 38.653549] cfg80211: Exceeded CRDA call max attempts. Not calling CRDA [ 38.664100] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 38.672395] 8021q: adding VLAN 0 to HW filter on device bond0 [ 38.680732] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 38.687860] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 38.694489] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 38.701910] bridge0: port 1(bridge_slave_0) entered forwarding state [ 38.708389] bridge0: port 1(bridge_slave_0) entered forwarding state [ 38.715473] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 38.722836] bridge0: port 2(bridge_slave_1) entered forwarding state [ 38.729311] bridge0: port 2(bridge_slave_1) entered forwarding state [ 38.737273] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 38.744930] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 38.752501] bridge0: port 1(bridge_slave_0) entered forwarding state [ 38.759030] bridge0: port 1(bridge_slave_0) entered forwarding state [ 38.766205] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 38.773331] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 38.781691] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 38.788718] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 38.797072] 8021q: adding VLAN 0 to HW filter on device bond0 [ 38.803595] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 38.810344] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 38.817193] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 38.824804] bridge0: port 2(bridge_slave_1) entered forwarding state [ 38.831366] bridge0: port 2(bridge_slave_1) entered forwarding state [ 38.838069] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 38.847865] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 38.854903] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 38.862406] bridge0: port 1(bridge_slave_0) entered forwarding state [ 38.868896] bridge0: port 1(bridge_slave_0) entered forwarding state [ 38.875491] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 38.882611] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 38.889913] bridge0: port 2(bridge_slave_1) entered forwarding state [ 38.896409] bridge0: port 2(bridge_slave_1) entered forwarding state [ 38.903064] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 38.910379] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 38.919955] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 38.928838] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 38.935824] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 38.943182] bridge0: port 1(bridge_slave_0) entered forwarding state [ 38.949665] bridge0: port 1(bridge_slave_0) entered forwarding state [ 38.956442] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 38.963779] bridge0: port 2(bridge_slave_1) entered forwarding state [ 38.970250] bridge0: port 2(bridge_slave_1) entered forwarding state [ 38.979181] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 38.986608] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 38.993989] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 39.001400] bridge0: port 1(bridge_slave_0) entered forwarding state [ 39.007888] bridge0: port 1(bridge_slave_0) entered forwarding state [ 39.014626] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 39.022054] bridge0: port 2(bridge_slave_1) entered forwarding state [ 39.028525] bridge0: port 2(bridge_slave_1) entered forwarding state [ 39.035222] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 39.044280] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 39.051470] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 39.058637] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 39.066213] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 39.075506] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 39.082668] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 39.090271] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 52.990595] bridge0: port 1(bridge_slave_0) entered forwarding state [ 53.030500] bridge0: port 2(bridge_slave_1) entered forwarding state [ 53.750514] bridge0: port 1(bridge_slave_0) entered forwarding state [ 53.757676] bridge0: port 2(bridge_slave_1) entered forwarding state [ 53.790525] bridge0: port 1(bridge_slave_0) entered forwarding state [ 53.870542] bridge0: port 2(bridge_slave_1) entered forwarding state [ 53.910511] bridge0: port 1(bridge_slave_0) entered forwarding state [ 53.917947] bridge0: port 2(bridge_slave_1) entered forwarding state [ 53.990494] bridge0: port 1(bridge_slave_0) entered forwarding state [ 53.997049] bridge0: port 2(bridge_slave_1) entered forwarding state [ 54.030504] bridge0: port 1(bridge_slave_0) entered forwarding state [ 54.070506] bridge0: port 2(bridge_slave_1) entered forwarding state 2019/11/08 14:59:28 executed programs: 20 2019/11/08 14:59:28 result: hanged=false err=executor 0: failed to write control pipe: write |1: broken pipe 2019/11/08 14:59:29 result: hanged=false err=executor 5: failed to write control pipe: write |1: broken pipe [ 282.210562] INFO: task syz-executor.4:5479 blocked for more than 140 seconds. [ 282.217902] Not tainted 4.1.0 #0 [ 282.221792] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 282.229736] syz-executor.4 D ffff8800b85afbb8 12096 5479 1 0x00000004 [ 282.237366] ffff8800b85afbb8 00000000b85afbb8 ffff8800b853e5d0 ffff880000000000 [ 282.245399] ffff8800b85b0000 ffff88012a6d9ae0 ffff8800b85afd38 ffff8800b853e5d0 [ 282.255078] 0000000000000286 ffff8800b85afbd8 ffffffff82645872 ffff88012a6d9ad8 [ 282.263114] Call Trace: [ 282.280274] [] schedule+0x32/0x80 [ 282.285362] [] schedule_preempt_disabled+0x13/0x20 [ 282.291922] [] mutex_lock_nested+0x195/0x610 [ 282.297960] [] ? lookup_slow+0x31/0xc0 [ 282.303480] [] lookup_slow+0x31/0xc0 [ 282.308821] [] link_path_walk+0x688/0x15c0 [ 282.314689] [] ? debug_lockdep_rcu_enabled+0x1d/0x20 [ 282.321426] [] ? _raw_spin_unlock+0x30/0x60 [ 282.327370] [] ? lockref_get+0x1d/0x30 [ 282.332892] [] path_mountpoint+0x2f5/0x490 [ 282.338765] [] filename_mountpoint+0x32/0xe0 [ 282.344816] [] user_path_mountpoint_at+0x31/0x40 [ 282.351551] [] SyS_umount+0x67/0x120 [ 282.356886] [] system_call_fastpath+0x16/0x7a [ 282.363032] 1 lock held by syz-executor.4/5479: [ 282.367673] #0: (&type->i_mutex_dir_key#4){+.+.+.}, at: [] lookup_slow+0x31/0xc0 [ 282.377674] sending NMI to all CPUs: [ 282.381453] NMI backtrace for cpu 0 [ 282.385067] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.1.0 #0 [ 282.391021] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 282.400371] task: ffffffff83214520 ti: ffffffff83200000 task.ti: ffffffff83200000 [ 282.407986] RIP: 0010:[] [] native_safe_halt+0x6/0x10 [ 282.416371] RSP: 0018:ffffffff83203e88 EFLAGS: 00000282 [ 282.421801] RAX: ffffffff83214520 RBX: 0000000000000000 RCX: 0000000000000000 [ 282.429048] RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffffffff83214520 [ 282.436328] RBP: ffffffff83203e88 R08: 0000000000000001 R09: 0000000000000000 [ 282.443583] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff83200000 [ 282.451023] R13: ffffffff8341b638 R14: 0000000000000000 R15: ffffffff83200000 [ 282.458280] FS: 0000000000000000(0000) GS:ffff88012c000000(0000) knlGS:0000000000000000 [ 282.466489] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 282.472354] CR2: 00007f75071c5016 CR3: 00000000ba97b000 CR4: 00000000001407f0 [ 282.479783] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 282.487051] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 282.494315] Stack: [ 282.496436] ffffffff83203ea8 ffffffff810896e9 0000000000000000 ffffffff83200000 [ 282.503966] ffffffff83203eb8 ffffffff8108a62a ffffffff83203f28 ffffffff811bd669 [ 282.511495] ffffffff83203ed8 ffffffff83204000 ffff88021fffd200 ffffffff83530940 [ 282.519536] Call Trace: [ 282.522101] [] default_idle+0x29/0x270 [ 282.527612] [] arch_cpu_idle+0xa/0x10 [ 282.533042] [] cpu_startup_entry+0x2e9/0x660 [ 282.539072] [] rest_init+0x134/0x140 [ 282.544428] [] start_kernel+0x438/0x445 [ 282.550027] [] ? early_idt_handler_array+0x120/0x120 [ 282.557195] [] x86_64_start_reservations+0x2a/0x2c [ 282.564373] [] x86_64_start_kernel+0x145/0x154 [ 282.570607] 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 [ 282.590188] NMI backtrace for cpu 1 [ 282.593795] CPU: 1 PID: 873 Comm: khungtaskd Not tainted 4.1.0 #0 [ 282.600001] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 282.609339] task: ffff88012a716c90 ti: ffff88012a164000 task.ti: ffff88012a164000 [ 282.616949] RIP: 0010:[] [] native_write_msr_safe+0xa/0x10 [ 282.626808] RSP: 0018:ffff88012a167d08 EFLAGS: 00000082 [ 282.632248] RAX: 0000000000000400 RBX: 0000000000000001 RCX: 0000000000000830 [ 282.639490] RDX: 0000000000000001 RSI: 0000000000000400 RDI: 0000000000000830 [ 282.646755] RBP: ffff88012a167d08 R08: 0000000000000000 R09: 0000000000000003 [ 282.654009] R10: ffff88012a716c90 R11: 0000000000000001 R12: ffffffff8341b108 [ 282.661286] R13: 0000000000080000 R14: 0000000000000001 R15: 000000000000a120 [ 282.668532] FS: 0000000000000000(0000) GS:ffff88012c100000(0000) knlGS:0000000000000000 [ 282.676754] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 282.682635] CR2: 00007f7507252000 CR3: 00000000b2a0b000 CR4: 00000000001407e0 [ 282.689878] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 282.697136] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 282.704913] Stack: [ 282.707037] ffff88012a167d68 ffffffff810c502f ffff88012a167d78 0000000000000296 [ 282.714564] 0000000200000002 0000000000000002 ffff88012a167d88 0000000000000040 [ 282.722089] 000000000000d3c0 0000000000000001 ffff8800b853e5d0 000000000000008c [ 282.729593] Call Trace: [ 282.732174] [] __x2apic_send_IPI_mask+0x10f/0x1a0 [ 282.738638] [] x2apic_send_IPI_mask+0xe/0x10 [ 282.745383] [] arch_trigger_all_cpu_backtrace+0x33d/0x350 [ 282.752574] [] ? lockdep_print_held_locks+0x77/0xe0 [ 282.759209] [] watchdog+0x47e/0x6c0 [ 282.764464] [] ? watchdog+0x8a/0x6c0 [ 282.769813] [] ? __schedule+0x388/0x9e0 [ 282.775507] [] ? reset_hung_task_detector+0x10/0x10 [ 282.782152] [] kthread+0xea/0x100 [ 282.787223] [] ? kthread_create_on_node+0x210/0x210 [ 282.793872] [] ret_from_fork+0x42/0x70 [ 282.799395] [] ? kthread_create_on_node+0x210/0x210 [ 282.806041] 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 [ 282.825427] Kernel panic - not syncing: hung_task: blocked tasks [ 282.831560] CPU: 0 PID: 873 Comm: khungtaskd Not tainted 4.1.0 #0 [ 282.837815] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 282.847141] 00000000003fff7c ffff88012a167d58 ffffffff8263d3db 0000000000000034 [ 282.855214] ffffffff82e3878a ffff88012a167dd8 ffffffff8263925e 0000000000000001 [ 282.863206] 0000000000000008 ffff88012a167de8 ffff88012a167d88 0000000000000005 [ 282.871251] Call Trace: [ 282.873824] [] dump_stack+0x4f/0x7b [ 282.879071] [] panic+0xcd/0x211 [ 282.884071] [] watchdog+0x48c/0x6c0 [ 282.889345] [] ? watchdog+0x8a/0x6c0 [ 282.894678] [] ? __schedule+0x388/0x9e0 [ 282.900287] [] ? reset_hung_task_detector+0x10/0x10 [ 282.906939] [] kthread+0xea/0x100 [ 282.912012] [] ? kthread_create_on_node+0x210/0x210 [ 282.918663] [] ret_from_fork+0x42/0x70 [ 282.924184] [] ? kthread_create_on_node+0x210/0x210 [ 282.932248] Kernel Offset: disabled