INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "6" 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 "5" respawning too fast: disabled for 5 minutes [ 438.532053] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.15' (ECDSA) to the list of known hosts. [ 444.040970] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "4" 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 "3" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes [ 520.770613] random: crng init done [ 613.568366] INFO: task kworker/u4:0:6 blocked for more than 120 seconds. [ 613.575228] Not tainted 4.9.96-g320d53a #7 [ 613.580455] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 613.588577] kworker/u4:0 D28312 6 2 0x00000000 [ 613.594444] Workqueue: events_unbound flush_to_ldisc [ 613.599925] ffff8801d9b40000 0000000000000000 ffff8801d91779c0 ffff8801d9b73000 [ 613.607938] ffff8801db321b98 ffff8801d9b4f6c8 ffffffff839e240d ffffffff81233817 [ 613.616187] 0000000000000000 ffff8801d9b408c0 0000000600000007 ffff8801db322468 [ 613.624408] Call Trace: [ 613.626991] [] ? __schedule+0x64d/0x1bd0 [ 613.633509] [] ? mark_held_locks+0xc7/0x130 [ 613.640201] [] schedule+0x7f/0x1b0 [ 613.645408] [] rwsem_down_write_failed+0x598/0x990 [ 613.652197] [] ? rwsem_down_write_failed+0x18c/0x990 [ 613.659167] [] ? rwsem_down_write_failed_killable+0xb40/0xb40 [ 613.666689] [] ? debug_check_no_locks_freed+0x210/0x210 [ 613.673992] [] ? migrate_swap_stop+0x820/0x820 [ 613.680472] [] ? __lock_is_held+0xa2/0xf0 [ 613.686266] [] call_rwsem_down_write_failed+0x17/0x30 [ 613.693345] [] down_write+0x5c/0xa0 [ 613.698816] [] ? isig+0xbd/0x4c0 [ 613.703812] [] isig+0xbd/0x4c0 [ 613.708850] [] n_tty_receive_signal_char+0x22/0xf0 [ 613.715411] [] n_tty_receive_char_special+0x10e1/0x2860 [ 613.722628] [] ? n_tty_receive_buf_common+0x8b/0x2300 [ 613.729654] [] n_tty_receive_buf_common+0x18ea/0x2300 [ 613.736488] [] ? mutex_lock_nested+0x572/0x870 [ 613.742932] [] n_tty_receive_buf2+0x33/0x40 [ 613.749076] [] tty_ldisc_receive_buf+0xaf/0x190 [ 613.755378] [] ? n_tty_receive_buf_common+0x2300/0x2300 [ 613.763118] [] flush_to_ldisc+0x253/0x370 [ 613.769168] [] ? __lock_is_held+0xa2/0xf0 [ 613.774999] [] process_one_work+0x7e1/0x1500 [ 613.781288] [] ? process_one_work+0x728/0x1500 [ 613.787506] [] ? pwq_dec_nr_in_flight+0x2e0/0x2e0 [ 613.794190] [] worker_thread+0xd6/0x10a0 [ 613.800080] [] kthread+0x26d/0x300 [ 613.805254] [] ? process_one_work+0x1500/0x1500 [ 613.811764] [] ? kthread_park+0xa0/0xa0 [ 613.817370] [] ? kthread_park+0xa0/0xa0 [ 613.823188] [] ? kthread_park+0xa0/0xa0 [ 613.828989] [] ret_from_fork+0x5c/0x70 [ 613.834503] [ 613.834503] Showing all locks held in the system: [ 613.841029] 5 locks held by kworker/u4:0/6: [ 613.845328] #0: ("events_unbound"){.+.+.+}, at: [] process_one_work+0x6ee/0x1500 [ 613.855098] #1: ((&buf->work)){+.+...}, at: [] process_one_work+0x728/0x1500 [ 613.864505] #2: (&tty->ldisc_sem){++++++}, at: [] tty_ldisc_ref+0x20/0x80 [ 613.873660] #3: (&port->buf.lock/1){+.+...}, at: [] flush_to_ldisc+0x86/0x370 [ 613.883302] #4: (&o_tty->termios_rwsem/1){++++..}, at: [] isig+0xbd/0x4c0 [ 613.892596] 2 locks held by khungtaskd/518: [ 613.896892] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 613.905671] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 613.915389] 2 locks held by getty/3773: [ 613.919347] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 613.928685] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 613.938622] [ 613.940230] ============================================= [ 613.940230] [ 613.949992] NMI backtrace for cpu 0 [ 613.953611] CPU: 0 PID: 518 Comm: khungtaskd Not tainted 4.9.96-g320d53a #7 [ 613.960690] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 613.970026] ffff8801d84d7d08 ffffffff81eb0b69 0000000000000000 0000000000000000 [ 613.978043] 0000000000000000 0000000000000001 ffffffff810b7d60 ffff8801d84d7d40 [ 613.986053] ffffffff81ebbe97 0000000000000000 0000000000000000 0000000000000002 [ 613.994061] Call Trace: [ 613.996676] [] dump_stack+0xc1/0x128 [ 614.002040] [] ? irq_force_complete_move+0x320/0x320 [ 614.008778] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 614.015252] [] ? irq_force_complete_move+0x320/0x320 [ 614.021985] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 614.029062] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 614.036059] [] watchdog+0x6b4/0xa20 [ 614.041319] [] ? watchdog+0x11c/0xa20 [ 614.046752] [] kthread+0x26d/0x300 [ 614.051927] [] ? reset_hung_task_detector+0x20/0x20 [ 614.058569] [] ? kthread_park+0xa0/0xa0 [ 614.064176] [] ? kthread_park+0xa0/0xa0 [ 614.069782] [] ? kthread_park+0xa0/0xa0 [ 614.075385] [] ret_from_fork+0x5c/0x70 [ 614.080984] Sending NMI from CPU 0 to CPUs 1: [ 614.085975] NMI backtrace for cpu 1 [ 614.089589] CPU: 1 PID: 3868 Comm: syz-executor091 Not tainted 4.9.96-g320d53a #7 [ 614.097182] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.106510] task: ffff8801d86b6000 task.stack: ffff8801c9f50000 [ 614.112538] RIP: 0010:[] c [] __sanitizer_cov_trace_pc+0x4/0x50 [ 614.121780] RSP: 0018:ffff8801c9f57898 EFLAGS: 00000292 [ 614.127199] RAX: fffffff74ca39964 RBX: ffffc900008d9000 RCX: 0000000000000002 [ 614.134442] RDX: 0000000000000000 RSI: ffffffff82118628 RDI: ffffc900008daa22 [ 614.141686] RBP: ffff8801c9f57898 R08: ffff8801d86b6938 R09: 0000000000000000 [ 614.148932] R10: 0000000000000000 R11: 0000000000000000 R12: 00000008b35c67c3 [ 614.156176] R13: 0000000000000127 R14: dffffc0000000000 R15: 00000008b35c67c3 [ 614.163419] FS: 0000000002611880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 614.171617] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 614.177472] CR2: 00007f3b27467000 CR3: 00000001da3c2000 CR4: 0000000000160670 [ 614.184716] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 614.191960] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 614.199203] Stack: [ 614.201326] ffff8801c9f57910c ffffffff8211863fc ffffc900008db270c 0000000000001103c [ 614.209526] ffffc900008db278c ffffed003afe3d35c ffff8801d7f1e9acc ffffc900008d9020c [ 614.217725] 0000000000001f00c ffff8801d7f1e600c ffffc900008d9000c ffff8801d7f1e600c [ 614.225922] Call Trace: [ 614.228478] [] __process_echoes+0x5cf/0x780 [ 614.234420] [] commit_echoes+0x147/0x1b0 [ 614.240102] [] n_tty_receive_char_special+0xd64/0x2860 [ 614.246997] [] n_tty_receive_buf_common+0x18ea/0x2300 [ 614.253803] [] n_tty_receive_buf+0x30/0x40 [ 614.259657] [] tty_ioctl+0xc8f/0x2270 [ 614.265077] [] ? no_tty+0xa0/0xa0 [ 614.270147] [] ? avc_ss_reset+0xe5/0x110 [ 614.275827] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 614.282722] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 614.289531] [] ? __might_sleep+0x95/0x1a0 [ 614.295298] [] ? no_tty+0xa0/0xa0 [ 614.300368] [] do_vfs_ioctl+0x1ac/0x11a0 [ 614.306048] [] ? ioctl_preallocate+0x220/0x220 [ 614.312246] [] ? kmem_cache_free+0x294/0x310 [ 614.318271] [] ? selinux_capable+0x40/0x40 [ 614.324122] [] ? do_sys_open+0x224/0x5c0 [ 614.329806] [] ? filp_open+0x70/0x70 [ 614.335137] [] ? security_file_ioctl+0x8f/0xc0 [ 614.341334] [] SyS_ioctl+0x8f/0xc0 [ 614.346494] [] ? do_vfs_ioctl+0x11a0/0x11a0 [ 614.352431] [] do_syscall_64+0x1a6/0x490 [ 614.358110] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 614.365013] Code: c4c c89 cff ce8 c3f ccb c1d c00 ce9 c5f cff cff cff c48 c89 cdf ce8 c92 cca c1d c00 ce9 cf9 cfe cff cff c66 c2e c0f c1f c84 c00 c00 c00 c00 c00 c0f c1f c00 c55 c48 c89 ce5 c<65> c48 c8b c04 c25 c40 c7d c01 c00 c65 c8b c15 cbc cb2 ccb c7e c81 ce2 c00 c01 c1f c [ 614.397772] Kernel panic - not syncing: hung_task: blocked tasks [ 614.403917] CPU: 0 PID: 518 Comm: khungtaskd Not tainted 4.9.96-g320d53a #7 [ 614.410992] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.420324] ffff8801d84d7cc8 ffffffff81eb0b69 ffffffff83a8b4e0 00000000ffffffff [ 614.428337] 0000000000000000 0000000000000000 dffffc0000000000 ffff8801d84d7d88 [ 614.436351] ffffffff8141f975 0000000041b58ab3 ffffffff841b8030 ffffffff8141f7b6 [ 614.444360] Call Trace: [ 614.446934] [] dump_stack+0xc1/0x128 [ 614.452283] [] panic+0x1bf/0x3bc [ 614.457276] [] ? add_taint.cold.6+0x16/0x16 [ 614.463228] [] ? ___preempt_schedule+0x16/0x18 [ 614.469440] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 614.476693] [] watchdog+0x6c5/0xa20 [ 614.481952] [] ? watchdog+0x11c/0xa20 [ 614.487383] [] kthread+0x26d/0x300 [ 614.492554] [] ? reset_hung_task_detector+0x20/0x20 [ 614.499197] [] ? kthread_park+0xa0/0xa0 [ 614.504803] [] ? kthread_park+0xa0/0xa0 [ 614.510404] [] ? kthread_park+0xa0/0xa0 [ 614.516008] [] ret_from_fork+0x5c/0x70 [ 614.522214] Dumping ftrace buffer: [ 614.525760] (ftrace buffer empty) [ 614.529443] Kernel Offset: disabled [ 614.533045] Rebooting in 86400 seconds..