INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes [ 518.214677] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.3' (ECDSA) to the list of known hosts. [ 523.664399] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program [ 607.673220] random: crng init done [ 736.507468] INFO: task syz-executor267:3898 blocked for more than 120 seconds. [ 736.514854] Not tainted 4.9.107-gdb2c520 #46 [ 736.520658] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 736.528776] syz-executor267 D27176 3898 3896 0x00000000 [ 736.534570] ffff8801b9f91800 0000000000000000 ffff8801d7289500 ffff8801d9a6b000 [ 736.542758] ffff8801db321c18 ffff8801d558f9f0 ffffffff839e8c1d 0000000000000002 [ 736.550835] 0000000041b58ab3 ffffffff843b9ea3 00ffffff81221500 ffff8801db3224e8 [ 736.558849] Call Trace: [ 736.561485] [] ? __schedule+0x64d/0x1bd0 [ 736.567179] [] schedule+0x7f/0x1b0 [ 736.572412] [] blk_mq_freeze_queue_wait+0x114/0x230 [ 736.579094] [] ? plug_ctx_cmp+0x100/0x100 [ 736.584903] [] ? prepare_to_wait_event+0x450/0x450 [ 736.591475] [] blk_mq_freeze_queue+0x1d/0x20 [ 736.597525] [] lo_ioctl+0x722/0x1aa0 [ 736.602862] [] ? loop_lookup.part.19+0x110/0x110 [ 736.609262] [] blkdev_ioctl+0x7b6/0x1a70 [ 736.614945] [] ? blkpg_ioctl+0x920/0x920 [ 736.620673] [] ? do_readv_writev+0x1fe/0x7a0 [ 736.626708] [] ? vfs_write+0x530/0x530 [ 736.632253] [] block_ioctl+0xde/0x120 [ 736.637694] [] ? blkdev_fallocate+0x440/0x440 [ 736.643814] [] do_vfs_ioctl+0x1ac/0x11a0 [ 736.649511] [] ? ioctl_preallocate+0x220/0x220 [ 736.655714] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 736.662667] [] ? selinux_capable+0x40/0x40 [ 736.668536] [] ? vfs_writev+0x8f/0xc0 [ 736.673959] [] ? do_pwritev+0x13e/0x240 [ 736.679608] [] ? security_file_ioctl+0x8f/0xc0 [ 736.685812] [] SyS_ioctl+0x8f/0xc0 [ 736.691024] [] ? do_vfs_ioctl+0x11a0/0x11a0 [ 736.696985] [] do_syscall_64+0x1a6/0x490 [ 736.702703] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 736.709614] [ 736.709614] Showing all locks held in the system: [ 736.715907] 2 locks held by khungtaskd/519: [ 736.720215] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 736.728972] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 736.738678] 2 locks held by getty/3762: [ 736.742621] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 736.751946] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 736.761883] 1 lock held by syz-executor267/3898: [ 736.766606] #0: (&lo->lo_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x8b/0x1aa0 [ 736.775964] [ 736.777587] ============================================= [ 736.777587] [ 736.784572] NMI backtrace for cpu 1 [ 736.788190] CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.107-gdb2c520 #46 [ 736.795433] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 736.804770] ffff8801d97bfd08 ffffffff81eb3da9 0000000000000000 0000000000000001 [ 736.812744] 0000000000000001 0000000000000001 ffffffff810b96a0 ffff8801d97bfd40 [ 736.820728] ffffffff81ebf0a7 0000000000000001 0000000000000000 0000000000000003 [ 736.828705] Call Trace: [ 736.831286] [] dump_stack+0xc1/0x128 [ 736.836654] [] ? irq_force_complete_move+0x320/0x320 [ 736.843379] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 736.849841] [] ? irq_force_complete_move+0x320/0x320 [ 736.856580] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 736.863662] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 736.870647] [] watchdog+0x6b4/0xa20 [ 736.875894] [] ? watchdog+0x11c/0xa20 [ 736.881336] [] kthread+0x26d/0x300 [ 736.886496] [] ? reset_hung_task_detector+0x20/0x20 [ 736.893141] [] ? kthread_park+0xa0/0xa0 [ 736.898733] [] ? kthread_park+0xa0/0xa0 [ 736.904336] [] ? kthread_park+0xa0/0xa0 [ 736.909930] [] ret_from_fork+0x5c/0x70 [ 736.915532] Sending NMI from CPU 1 to CPUs 0: [ 736.920052] NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff839f8726 [ 736.927273] Kernel panic - not syncing: hung_task: blocked tasks [ 736.933397] CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.107-gdb2c520 #46 [ 736.940649] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 736.949986] ffff8801d97bfcc8 ffffffff81eb3da9 ffffffff83c8bdc0 00000000ffffffff [ 736.957961] 0000000000000000 0000000000000001 dffffc0000000000 ffff8801d97bfd88 [ 736.965953] ffffffff81421925 0000000041b58ab3 ffffffff843b9b48 ffffffff81421766 [ 736.973945] Call Trace: [ 736.976506] [] dump_stack+0xc1/0x128 [ 736.981842] [] panic+0x1bf/0x3bc [ 736.986829] [] ? add_taint.cold.6+0x16/0x16 [ 736.992771] [] ? ___preempt_schedule+0x16/0x18 [ 736.998974] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 737.006228] [] watchdog+0x6c5/0xa20 [ 737.011473] [] ? watchdog+0x11c/0xa20 [ 737.016894] [] kthread+0x26d/0x300 [ 737.022055] [] ? reset_hung_task_detector+0x20/0x20 [ 737.028691] [] ? kthread_park+0xa0/0xa0 [ 737.034284] [] ? kthread_park+0xa0/0xa0 [ 737.039887] [] ? kthread_park+0xa0/0xa0 [ 737.045483] [] ret_from_fork+0x5c/0x70 [ 737.051468] Dumping ftrace buffer: [ 737.055017] (ftrace buffer empty) [ 737.058701] Kernel Offset: disabled [ 737.062307] Rebooting in 86400 seconds..