INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "4" respawning too fast: disabled for 5 minutes Warning: Permanently added '10.128.10.45' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes [ 613.698221] INFO: task syz-executor385:3867 blocked for more than 120 seconds. [ 613.705690] Not tainted 4.9.109-ge1815b3 #49 [ 613.710754] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 613.718825] syz-executor385 D29768 3867 3866 0x00000000 [ 613.724621] ffff8801d76f6000 ffff8801c720ea00 ffff8801d98f3480 ffff8801d75fb000 [ 613.732729] ffff8801db321c18 ffff8801d6d5fb48 ffffffff839e8a8d ffff8801d76f68c8 [ 613.740799] ffffed003aeded18 ffff8801d76f6000 00fffc0000000000 ffff8801db3224e8 [ 613.748876] Call Trace: [ 613.751504] [] ? __schedule+0x64d/0x1bd0 [ 613.757191] [] schedule+0x7f/0x1b0 [ 613.762406] [] schedule_preempt_disabled+0x13/0x20 [ 613.769390] [] mutex_lock_nested+0x326/0x870 [ 613.775465] [] ? loop_control_ioctl+0x7a/0x300 [ 613.781712] [] ? mutex_trylock+0x3e0/0x3e0 [ 613.787617] [] ? __lock_acquire+0x654/0x4070 [ 613.793719] [] loop_control_ioctl+0x7a/0x300 [ 613.799789] [] ? loop_lookup+0x160/0x160 [ 613.805519] [] ? __might_sleep+0x95/0x1a0 [ 613.811337] [] ? loop_lookup+0x160/0x160 [ 613.817043] [] do_vfs_ioctl+0x1ac/0x11a0 [ 613.822787] [] ? ioctl_preallocate+0x220/0x220 [ 613.829067] [] ? selinux_capable+0x40/0x40 [ 613.834996] [] ? __do_page_fault+0x5dd/0xd50 [ 613.841192] [] ? security_file_ioctl+0x8f/0xc0 [ 613.847405] [] SyS_ioctl+0x8f/0xc0 [ 613.852623] [] ? do_vfs_ioctl+0x11a0/0x11a0 [ 613.858693] [] do_syscall_64+0x1a6/0x490 [ 613.864381] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 613.871571] [ 613.871571] Showing all locks held in the system: [ 613.877871] 2 locks held by khungtaskd/520: [ 613.882197] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 613.890978] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 613.900683] 2 locks held by getty/3772: [ 613.904635] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 613.914001] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 613.923996] 1 lock held by syz-executor385/3867: [ 613.928766] #0: (loop_index_mutex){+.+.+.}, at: [] loop_control_ioctl+0x7a/0x300 [ 613.938574] 1 lock held by syz-executor385/3868: [ 613.943300] #0: (loop_index_mutex){+.+.+.}, at: [] loop_control_ioctl+0x7a/0x300 [ 613.953084] 2 locks held by syz-executor385/3869: [ 613.957900] #0: (loop_index_mutex){+.+.+.}, at: [] loop_control_ioctl+0x7a/0x300 [ 613.967687] #1: (&lo->lo_ctl_mutex#2){+.+...}, at: [] loop_control_ioctl+0x186/0x300 [ 613.977909] 2 locks held by syz-executor385/3870: [ 613.982747] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1aa0 [ 613.992115] #1: (&bdev->bd_mutex){+.+.+.}, at: [] blkdev_reread_part+0x1e/0x40 [ 614.001881] 1 lock held by syz-executor385/3871: [ 614.006613] #0: (loop_index_mutex){+.+.+.}, at: [] loop_control_ioctl+0x7a/0x300 [ 614.016426] 2 locks held by syz-executor385/3872: [ 614.021288] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1aa0 [ 614.030656] #1: (&bdev->bd_mutex){+.+.+.}, at: [] blkdev_reread_part+0x1e/0x40 [ 614.040271] 2 locks held by syz-executor385/3873: [ 614.045090] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1aa0 [ 614.054507] #1: (&bdev->bd_mutex){+.+.+.}, at: [] blkdev_reread_part+0x1e/0x40 [ 614.064127] 1 lock held by syz-executor385/3874: [ 614.068922] #0: (loop_index_mutex){+.+.+.}, at: [] loop_control_ioctl+0x7a/0x300 [ 614.078735] 2 locks held by blkid/3876: [ 614.082682] #0: (&bdev->bd_mutex){+.+.+.}, at: [] __blkdev_get+0x10c/0xd60 [ 614.092036] #1: (loop_index_mutex){+.+.+.}, at: [] lo_open+0x1b/0xa0 [ 614.100776] 2 locks held by blkid/3878: [ 614.104722] #0: (&bdev->bd_mutex){+.+.+.}, at: [] __blkdev_get+0x10c/0xd60 [ 614.113964] #1: (loop_index_mutex){+.+.+.}, at: [] lo_open+0x1b/0xa0 [ 614.122744] 2 locks held by blkid/3883: [ 614.126689] #0: (&bdev->bd_mutex){+.+.+.}, at: [] __blkdev_get+0x10c/0xd60 [ 614.135974] #1: (loop_index_mutex){+.+.+.}, at: [] lo_open+0x1b/0xa0 [ 614.144831] [ 614.146432] ============================================= [ 614.146432] [ 614.153536] NMI backtrace for cpu 1 [ 614.157142] CPU: 1 PID: 520 Comm: khungtaskd Not tainted 4.9.109-ge1815b3 #49 [ 614.164386] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.173726] ffff8801d92dfd08 ffffffff81eb3e29 0000000000000000 0000000000000001 [ 614.181747] 0000000000000001 0000000000000001 ffffffff810b9580 ffff8801d92dfd40 [ 614.189728] ffffffff81ebf127 0000000000000001 0000000000000000 0000000000000003 [ 614.197715] Call Trace: [ 614.200309] [] dump_stack+0xc1/0x128 [ 614.205709] [] ? irq_force_complete_move+0x320/0x320 [ 614.212445] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 614.218911] [] ? irq_force_complete_move+0x320/0x320 [ 614.225647] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 614.232722] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 614.239710] [] watchdog+0x6b4/0xa20 [ 614.245221] [] ? watchdog+0x11c/0xa20 [ 614.250686] [] kthread+0x26d/0x300 [ 614.255858] [] ? reset_hung_task_detector+0x20/0x20 [ 614.262503] [] ? kthread_park+0xa0/0xa0 [ 614.268103] [] ? kthread_park+0xa0/0xa0 [ 614.273702] [] ? kthread_park+0xa0/0xa0 [ 614.279305] [] ret_from_fork+0x5c/0x70 [ 614.284986] Sending NMI from CPU 1 to CPUs 0: [ 614.289536] NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff839f8596 [ 614.297063] Kernel panic - not syncing: hung_task: blocked tasks [ 614.303204] CPU: 1 PID: 520 Comm: khungtaskd Not tainted 4.9.109-ge1815b3 #49 [ 614.310448] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.320388] ffff8801d92dfcc8 ffffffff81eb3e29 ffffffff83c8bbe0 00000000ffffffff [ 614.328408] 0000000000000000 0000000000000001 dffffc0000000000 ffff8801d92dfd88 [ 614.336428] ffffffff81421925 0000000041b58ab3 ffffffff843b9a40 ffffffff81421766 [ 614.344423] Call Trace: [ 614.346999] [] dump_stack+0xc1/0x128 [ 614.352345] [] panic+0x1bf/0x3bc [ 614.357340] [] ? add_taint.cold.6+0x16/0x16 [ 614.363299] [] ? ___preempt_schedule+0x16/0x18 [ 614.369521] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 614.376769] [] watchdog+0x6c5/0xa20 [ 614.382019] [] ? watchdog+0x11c/0xa20 [ 614.387442] [] kthread+0x26d/0x300 [ 614.392611] [] ? reset_hung_task_detector+0x20/0x20 [ 614.399258] [] ? kthread_park+0xa0/0xa0 [ 614.404856] [] ? kthread_park+0xa0/0xa0 [ 614.410686] [] ? kthread_park+0xa0/0xa0 [ 614.416381] [] ret_from_fork+0x5c/0x70 [ 614.422540] Dumping ftrace buffer: [ 614.426107] (ftrace buffer empty) [ 614.429791] Kernel Offset: disabled [ 614.433402] Rebooting in 86400 seconds..