[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 61.210635] IPVS: Creating netns size=2720 id=1 [ 61.215491] IPVS: ftp: loaded support on port[0] = 21 Warning: Permanently added '10.128.15.226' (ECDSA) to the list of known hosts. 2019/04/10 04:36:43 parsed 1 programs 2019/04/10 04:36:43 executed programs: 0 [ 72.244490] IPVS: Creating netns size=2720 id=2 [ 72.258011] IPVS: ftp: loaded support on port[0] = 21 [ 72.318232] IPVS: Creating netns size=2720 id=3 [ 72.336846] IPVS: ftp: loaded support on port[0] = 21 [ 72.391296] IPVS: Creating netns size=2720 id=4 [ 72.396120] IPVS: ftp: loaded support on port[0] = 21 [ 72.443224] IPVS: Creating netns size=2720 id=5 [ 72.448025] IPVS: ftp: loaded support on port[0] = 21 [ 72.509259] IPVS: Creating netns size=2720 id=6 [ 72.514048] IPVS: ftp: loaded support on port[0] = 21 [ 72.586758] IPVS: Creating netns size=2720 id=7 [ 72.595812] IPVS: ftp: loaded support on port[0] = 21 [ 72.926539] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.937030] bridge0: port 1(bridge_slave_0) entered disabled state [ 72.948735] device bridge_slave_0 entered promiscuous mode [ 72.962954] ip (6701) used greatest stack depth: 24072 bytes left [ 73.023033] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.032735] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.040439] device bridge_slave_1 entered promiscuous mode [ 73.115728] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 73.176890] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 73.223143] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.230827] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.237871] device bridge_slave_0 entered promiscuous mode [ 73.327235] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.335360] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.344230] device bridge_slave_1 entered promiscuous mode [ 73.386140] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.396044] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.403641] device bridge_slave_0 entered promiscuous mode [ 73.411346] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.417720] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.425657] device bridge_slave_0 entered promiscuous mode [ 73.449157] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 73.470286] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 73.480902] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.490134] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.502284] ip (6789) used greatest stack depth: 23624 bytes left [ 73.508634] device bridge_slave_1 entered promiscuous mode [ 73.515179] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.522221] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.529460] device bridge_slave_1 entered promiscuous mode [ 73.537590] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.544527] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.551776] device bridge_slave_0 entered promiscuous mode [ 73.559873] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 73.576823] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 73.586713] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 73.597384] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 73.610533] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.616914] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.630403] device bridge_slave_1 entered promiscuous mode [ 73.653566] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 73.670802] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 73.697289] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 73.732269] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.740841] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.748165] device bridge_slave_0 entered promiscuous mode [ 73.756931] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 73.789030] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 73.828437] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 73.841859] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.848392] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.861772] device bridge_slave_1 entered promiscuous mode [ 73.870516] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 73.880375] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 73.889922] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 73.901805] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 73.922641] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 73.934565] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 73.945361] team0: Port device team_slave_0 added [ 73.955549] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 73.965877] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 74.029607] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 74.038963] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 74.046480] team0: Port device team_slave_1 added [ 74.110422] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 74.130922] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.154377] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 74.164881] team0: Port device team_slave_0 added [ 74.177263] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 74.192966] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 74.204988] team0: Port device team_slave_0 added [ 74.210805] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.233709] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 74.244955] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 74.261898] team0: Port device team_slave_0 added [ 74.268159] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 74.276383] team0: Port device team_slave_1 added [ 74.286903] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 74.297363] team0: Port device team_slave_1 added [ 74.305135] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 74.320931] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 74.328188] team0: Port device team_slave_1 added [ 74.360449] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.368791] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.390877] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.420556] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.428377] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.445203] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 74.453136] team0: Port device team_slave_0 added [ 74.466922] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 74.478108] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 74.486323] team0: Port device team_slave_0 added [ 74.501383] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 74.511167] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 74.532235] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.541613] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 74.550005] team0: Port device team_slave_1 added [ 74.558168] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 74.576963] team0: Port device team_slave_1 added [ 74.583472] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 74.611239] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 74.628923] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.636550] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.660412] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.668192] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 74.705169] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.719786] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 74.738387] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 74.757125] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 74.786219] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 74.912075] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.918567] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.926014] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.932433] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.025013] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.031420] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.038069] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.044694] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.162725] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.169235] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.175857] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.182382] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.202612] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.209576] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.218230] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.232345] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.305057] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.311904] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.318625] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.325113] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.334577] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.342353] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.350634] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.357027] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.945518] 8021q: adding VLAN 0 to HW filter on device bond0 [ 76.960710] 8021q: adding VLAN 0 to HW filter on device bond0 [ 77.081160] 8021q: adding VLAN 0 to HW filter on device bond0 [ 77.133768] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 77.144629] 8021q: adding VLAN 0 to HW filter on device bond0 [ 77.153208] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 77.208390] 8021q: adding VLAN 0 to HW filter on device bond0 [ 77.228848] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 77.294921] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 77.318092] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 77.340314] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 77.350491] 8021q: adding VLAN 0 to HW filter on device bond0 [ 77.398329] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 77.408326] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 77.456318] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 77.473493] 8021q: adding VLAN 0 to HW filter on device team0 [ 77.496778] 8021q: adding VLAN 0 to HW filter on device team0 [ 77.567742] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 77.577316] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 77.595933] 8021q: adding VLAN 0 to HW filter on device team0 [ 77.605123] 8021q: adding VLAN 0 to HW filter on device team0 [ 77.715493] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 77.737552] 8021q: adding VLAN 0 to HW filter on device team0 [ 77.847139] 8021q: adding VLAN 0 to HW filter on device team0 2019/04/10 04:36:50 executed programs: 6 2019/04/10 04:36:55 executed programs: 195 2019/04/10 04:37:00 executed programs: 382 2019/04/10 04:37:05 executed programs: 568 2019/04/10 04:37:10 executed programs: 758 2019/04/10 04:37:15 executed programs: 944 2019/04/10 04:37:20 executed programs: 1129 2019/04/10 04:37:25 executed programs: 1318 2019/04/10 04:37:30 executed programs: 1510 2019/04/10 04:37:35 executed programs: 1700 2019/04/10 04:37:40 executed programs: 1893 2019/04/10 04:37:45 executed programs: 2080 2019/04/10 04:37:50 executed programs: 2267 2019/04/10 04:37:55 executed programs: 2454 2019/04/10 04:38:00 executed programs: 2641 2019/04/10 04:38:05 executed programs: 2823 2019/04/10 04:38:10 executed programs: 3008 2019/04/10 04:38:15 executed programs: 3199 2019/04/10 04:38:20 executed programs: 3387 2019/04/10 04:38:25 executed programs: 3573 2019/04/10 04:38:30 executed programs: 3755 2019/04/10 04:38:35 executed programs: 3923 2019/04/10 04:38:40 executed programs: 4098 2019/04/10 04:38:45 executed programs: 4275 2019/04/10 04:38:51 executed programs: 4448 2019/04/10 04:38:56 executed programs: 4624 2019/04/10 04:39:01 executed programs: 4803 2019/04/10 04:39:06 executed programs: 4990 2019/04/10 04:39:11 executed programs: 5177 2019/04/10 04:39:16 executed programs: 5352 2019/04/10 04:39:21 executed programs: 5532 2019/04/10 04:39:26 executed programs: 5715 2019/04/10 04:39:31 executed programs: 5902 2019/04/10 04:40:34 executed programs: 6042 2019/04/10 04:40:34 result: failed=false hanged=false err=executor 1: failed to write control pipe: write |1: broken pipe [ 303.085849] IPv6: ADDRCONF(NETDEV_CHANGE): nr1: link becomes ready [ 303.421425] device bridge_slave_1 left promiscuous mode [ 303.427806] bridge0: port 2(bridge_slave_1) entered disabled state [ 303.501598] device bridge_slave_0 left promiscuous mode [ 303.508106] bridge0: port 1(bridge_slave_0) entered disabled state [ 303.596759] team0 (unregistering): Port device team_slave_1 removed [ 303.608007] team0 (unregistering): Port device team_slave_0 removed [ 303.620273] bond0 (unregistering): Releasing backup interface bond_slave_1 [ 303.651158] bond0 (unregistering): Releasing backup interface bond_slave_0 [ 303.703121] bond0 (unregistering): Released all slaves [ 307.569149] IPVS: Creating netns size=2720 id=8 [ 307.574406] IPVS: ftp: loaded support on port[0] = 21 [ 307.728138] bridge0: port 1(bridge_slave_0) entered blocking state [ 307.735214] bridge0: port 1(bridge_slave_0) entered disabled state [ 307.742269] device bridge_slave_0 entered promiscuous mode [ 307.755121] bridge0: port 2(bridge_slave_1) entered blocking state [ 307.761856] bridge0: port 2(bridge_slave_1) entered disabled state [ 307.769457] device bridge_slave_1 entered promiscuous mode [ 307.781621] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 307.794675] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 307.826705] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 307.842755] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 307.891120] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 307.898375] team0: Port device team_slave_0 added [ 307.910828] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 307.917954] team0: Port device team_slave_1 added [ 307.930365] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 307.947885] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 307.962008] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 307.976705] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 308.057651] bridge0: port 2(bridge_slave_1) entered blocking state [ 308.064049] bridge0: port 2(bridge_slave_1) entered forwarding state [ 308.070695] bridge0: port 1(bridge_slave_0) entered blocking state [ 308.077086] bridge0: port 1(bridge_slave_0) entered forwarding state [ 308.410192] 8021q: adding VLAN 0 to HW filter on device bond0 [ 308.446016] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 308.477639] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 308.509783] 8021q: adding VLAN 0 to HW filter on device team0 2019/04/10 04:40:40 executed programs: 6060 2019/04/10 04:40:45 executed programs: 6257 2019/04/10 04:40:50 executed programs: 6444 2019/04/10 04:40:55 executed programs: 6634 2019/04/10 04:41:00 executed programs: 6817 2019/04/10 04:41:05 executed programs: 7000 2019/04/10 04:41:10 executed programs: 7193 2019/04/10 04:41:15 executed programs: 7385 2019/04/10 04:41:20 executed programs: 7572 2019/04/10 04:41:25 executed programs: 7754 2019/04/10 04:41:30 executed programs: 7942 2019/04/10 04:41:35 executed programs: 8139 2019/04/10 04:41:40 executed programs: 8324 2019/04/10 04:41:46 executed programs: 8511 2019/04/10 04:41:51 executed programs: 8697 2019/04/10 04:41:56 executed programs: 8881 2019/04/10 04:42:01 executed programs: 9065 2019/04/10 04:42:06 executed programs: 9253 2019/04/10 04:42:11 executed programs: 9436 2019/04/10 04:42:16 executed programs: 9614 2019/04/10 04:42:21 executed programs: 9790 2019/04/10 04:42:26 executed programs: 9972 2019/04/10 04:42:31 executed programs: 10156 2019/04/10 04:42:36 executed programs: 10341 [ 427.989094] INFO: task syz-executor1:12767 blocked for more than 140 seconds. [ 427.997357] Not tainted 4.11.0-rc5+ #1 [ 428.009770] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 428.021597] syz-executor1 D28744 12767 6488 0x00000002 [ 428.033055] Call Trace: [ 428.039976] __schedule+0x935/0x1eb0 [ 428.052055] ? pci_mmcfg_check_reserved+0x110/0x110 [ 428.069427] ? update_load_avg+0x1174/0x2840 [ 428.087130] schedule+0x92/0x1b0 [ 428.096486] schedule_timeout+0x580/0xc30 [ 428.115508] ? resched_curr+0x154/0x1e0 [ 428.123203] ? usleep_range+0x140/0x140 [ 428.138030] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 428.163973] ? lock_acquire+0x183/0x460 [ 428.168078] ? lock_acquire+0x183/0x460 [ 428.176902] ? wait_for_completion+0x276/0x3f0 [ 428.190593] ? _raw_spin_unlock_irq+0x27/0x80 [ 428.206268] wait_for_completion+0x26b/0x3f0 [ 428.218660] ? wait_for_completion+0x26b/0x3f0 [ 428.233876] ? wait_for_completion_interruptible+0x440/0x440 [ 428.268984] ? wake_up_q+0xe0/0xe0 [ 428.293755] kthread_stop+0xc2/0x610 [ 428.300955] vivid_stop_generating_vid_cap+0x195/0x6c0 [ 428.309802] vid_cap_stop_streaming+0x71/0xe0 [ 428.315095] __vb2_queue_cancel+0x99/0x6e0 [ 428.321604] ? vivid_fop_release+0x7a/0x400 [ 428.326440] vb2_core_streamoff+0x62/0x140 [ 428.331428] __vb2_cleanup_fileio+0x69/0x150 [ 428.336787] vb2_core_queue_release+0xf/0x70 [ 428.343366] _vb2_fop_release+0x1af/0x260 [ 428.365036] vb2_fop_release+0x6a/0xd0 [ 428.381351] vivid_fop_release+0x163/0x400 [ 428.398177] v4l2_release+0xeb/0x210 [ 428.412777] __fput+0x25c/0x730 [ 428.416301] ____fput+0x9/0x10 [ 428.440691] task_work_run+0xd9/0x150 [ 428.447172] do_exit+0x7c1/0x3050 [ 428.454551] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 428.478378] ? __remove_hrtimer+0x180/0x180 [ 428.501748] ? mm_update_next_owner+0x720/0x720 [ 428.515648] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 428.523020] ? lock_acquire+0x183/0x460 [ 428.529691] ? lock_acquire+0x183/0x460 [ 428.538647] ? get_signal+0x1b2/0x13b0 [ 428.542801] ? _raw_spin_unlock_irq+0x27/0x80 [ 428.548685] do_group_exit+0xf4/0x2f0 [ 428.557917] get_signal+0x4b6/0x13b0 [ 428.594170] do_signal+0x7f/0x19c0 [ 428.597959] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 428.608349] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 428.651653] ? setup_sigcontext+0x7d0/0x7d0 [ 428.675038] ? lock_acquire+0x183/0x460 [ 428.679363] ? kvm_clock_get_cycles+0x9/0x10 [ 428.683806] ? SyS_futex+0x1ac/0x280 [ 428.687807] ? exit_to_usermode_loop+0x41/0x1c0 [ 428.692779] exit_to_usermode_loop+0x12b/0x1c0 [ 428.697493] syscall_return_slowpath+0x24f/0x2d0 [ 428.702680] entry_SYSCALL_64_fastpath+0xc4/0xc6 [ 428.707744] RIP: 0033:0x4578a9 [ 428.738332] RSP: 002b:00007ffe6568c288 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 428.747651] RAX: fffffffffffffdfc RBX: 000000000000002d RCX: 00000000004578a9 [ 428.764367] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000073bf0c [ 428.778888] RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 [ 428.791988] R10: 00007ffe6568c350 R11: 0000000000000246 R12: 00000000000003e8 [ 428.804162] R13: 000000000003b585 R14: 000000000003b558 R15: 000000000073bf0c [ 428.840542] [ 428.840542] Showing all locks held in the system: [ 428.847122] 2 locks held by khungtaskd/970: [ 428.851555] #0: (rcu_read_lock){......}, at: [] watchdog+0x109/0x9e0 [ 428.859990] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x70/0x280 [ 428.869300] 2 locks held by getty/6368: [ 428.873637] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x2d/0x40 [ 428.882620] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x1d1/0x1660 [ 428.892340] 2 locks held by getty/6369: [ 428.896324] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x2d/0x40 [ 428.905233] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x1d1/0x1660 [ 428.914988] 2 locks held by getty/6370: [ 428.919033] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x2d/0x40 [ 428.927905] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x1d1/0x1660 [ 428.937447] 2 locks held by getty/6371: [ 428.943466] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x2d/0x40 [ 428.952726] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x1d1/0x1660 [ 428.962540] 2 locks held by getty/6372: [ 428.966612] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x2d/0x40 [ 428.976099] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x1d1/0x1660 [ 428.987282] 2 locks held by getty/6373: [ 428.991271] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x2d/0x40 [ 429.000223] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x1d1/0x1660 [ 429.009805] 2 locks held by getty/6374: [ 429.013777] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x2d/0x40 [ 429.022913] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x1d1/0x1660 [ 429.032442] 1 lock held by syz-executor0/9515: [ 429.037047] #0: (&bdev->bd_mutex){+.+.+.}, at: [] __blkdev_get+0x296/0xeb0 [ 429.045893] 2 locks held by blkid/9496: [ 429.049884] #0: (&bdev->bd_mutex){+.+.+.}, at: [] __blkdev_put+0xae/0x9e0 [ 429.058609] #1: (&lo->lo_ctl_mutex#2){+.+.+.}, at: [] lo_release+0x5c/0x120 [ 429.067494] 2 locks held by blkid/9498: [ 429.071727] #0: (&bdev->bd_mutex){+.+.+.}, at: [] __blkdev_put+0xae/0x9e0 [ 429.080469] #1: (&lo->lo_ctl_mutex#2){+.+.+.}, at: [] lo_release+0x5c/0x120 [ 429.090058] 1 lock held by syz-executor5/9513: [ 429.094959] #0: (&bdev->bd_mutex){+.+.+.}, at: [] __blkdev_get+0x296/0xeb0 [ 429.103912] 2 locks held by blkid/9506: [ 429.107890] #0: (&bdev->bd_mutex){+.+.+.}, at: [] __blkdev_put+0xae/0x9e0 [ 429.116768] #1: (&lo->lo_ctl_mutex#2){+.+.+.}, at: [] lo_release+0x5c/0x120 [ 429.125782] 2 locks held by blkid/9507: [ 429.129786] #0: (&bdev->bd_mutex){+.+.+.}, at: [] __blkdev_put+0xae/0x9e0 [ 429.138541] #1: (&lo->lo_ctl_mutex#2){+.+.+.}, at: [] lo_release+0x5c/0x120 [ 429.147975] 2 locks held by blkid/9510: [ 429.152324] #0: (&bdev->bd_mutex){+.+.+.}, at: [] __blkdev_put+0xae/0x9e0 [ 429.161290] #1: (&lo->lo_ctl_mutex#2){+.+.+.}, at: [] lo_release+0x5c/0x120 [ 429.170414] [ 429.172125] ============================================= [ 429.172125] [ 429.181479] NMI backtrace for cpu 1 [ 429.185835] CPU: 1 PID: 970 Comm: khungtaskd Not tainted 4.11.0-rc5+ #1 [ 429.193836] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 429.203329] Call Trace: [ 429.205922] dump_stack+0xe6/0x120 [ 429.209901] nmi_cpu_backtrace+0x137/0x160 [ 429.214126] ? irq_force_complete_move+0x430/0x430 [ 429.219151] nmi_trigger_cpumask_backtrace+0xf8/0x1a0 [ 429.224342] arch_trigger_cpumask_backtrace+0x14/0x20 [ 429.229546] watchdog+0x62d/0x9e0 [ 429.233017] ? trace_hardirqs_on_caller+0x44c/0x5e0 [ 429.238049] kthread+0x2c9/0x3d0 [ 429.241409] ? reset_hung_task_detector+0x10/0x10 [ 429.246334] ? kthread_create_on_node+0xa0/0xa0 [ 429.251086] ret_from_fork+0x31/0x40 [ 429.255179] Sending NMI from CPU 1 to CPUs 0: [ 429.260179] NMI backtrace for cpu 0 [ 429.260181] CPU: 0 PID: 9526 Comm: syz-executor4 Not tainted 4.11.0-rc5+ #1 [ 429.260183] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 429.260184] task: ffff8801bede23c0 task.stack: ffff8801c00d0000 [ 429.260186] RIP: 0010:do_futex+0x17d/0x16b0 [ 429.260187] RSP: 0018:ffff8801c00d7e18 EFLAGS: 00000246 [ 429.260190] RAX: 0000000000000001 RBX: 1ffff1003801afd0 RCX: 0000000000000000 [ 429.260192] RDX: ffffed003801af96 RSI: ffff8801c00d7ba8 RDI: ffffed003801afbe [ 429.260193] RBP: ffff8801c00d7e38 R08: ffff8801dac25130 R09: 0000000000000000 [ 429.260195] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 429.260196] R13: ffff8801c00d7e10 R14: 00000000004bfda9 R15: 0000000000000000 [ 429.260198] FS: 00007f42b901a700(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 429.260199] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 429.260201] CR2: 0000000000000000 CR3: 00000001c4541000 CR4: 00000000001406f0 [ 429.260202] Call Trace: [ 429.260203] SyS_futex+0x1ac/0x280 [ 429.260204] ? do_futex+0x16b0/0x16b0 [ 429.260206] ? entry_SYSCALL_64_fastpath+0x5/0xc6 [ 429.260207] ? trace_hardirqs_on_caller+0x44c/0x5e0 [ 429.260208] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 429.260210] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 429.260211] RIP: 0033:0x4578a9 [ 429.260212] RSP: 002b:00007f42b9019cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 429.260215] RAX: ffffffffffffffda RBX: 000000000073bf08 RCX: 00000000004578a9 [ 429.260216] RDX: 00000000004bfda9 RSI: 0000000000000081 RDI: 000000000073bf0c [ 429.260218] RBP: 0000000000000086 R08: 000000000000000e R09: 0000000000000000 [ 429.260219] R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f42b901a6d4 [ 429.260220] R13: 00000000004c6003 R14: 00000000004dadb0 R15: 00000000ffffffff [ 429.260221] Code: ba 00 00 00 00 00 fc ff df 48 03 95 68 fe ff ff 31 c0 b9 05 00 00 00 48 89 d7 f3 48 ab 4c 89 e0 c7 07 00 00 00 00 48 8d 65 d8 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 48 8b bd 70 fe ff ff 48 89 d9 44 [ 429.276409] kobject: 'loop1' (ffff8801d263b6e0): kobject_uevent_env [ 429.276428] kobject: 'loop1' (ffff8801d263b6e0): fill_kobj_path: path = '/devices/virtual/block/loop1' [ 429.283543] Kernel panic - not syncing: hung_task: blocked tasks [ 429.283554] CPU: 1 PID: 970 Comm: khungtaskd Not tainted 4.11.0-rc5+ #1 [ 429.283556] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 429.283559] Call Trace: [ 429.283572] dump_stack+0xe6/0x120 [ 429.283580] panic+0x1b6/0x358 [ 429.283585] ? percpu_up_read_preempt_enable.constprop.37+0xb9/0xb9 [ 429.283590] ? preempt_schedule+0x4e/0x60 [ 429.283604] watchdog+0x63e/0x9e0 [ 429.283609] ? trace_hardirqs_on_caller+0x44c/0x5e0 [ 429.283629] kthread+0x2c9/0x3d0 [ 429.283633] ? reset_hung_task_detector+0x10/0x10 [ 429.283637] ? kthread_create_on_node+0xa0/0xa0 [ 429.283644] ret_from_fork+0x31/0x40 [ 429.538827] Kernel Offset: disabled [ 429.542480] Rebooting in 86400 seconds..