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 INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes Warning: Permanently added '10.128.10.15' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program INIT: Id "4" 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 INIT: Id "1" 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 [ 613.797551] INFO: task kworker/u4:2:45 blocked for more than 120 seconds. [ 613.804535] Not tainted 4.9.109-ge1815b3 #49 [ 613.809846] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 613.818030] kworker/u4:2 D26296 45 2 0x00000000 [ 613.823944] Workqueue: events_unbound flush_to_ldisc [ 613.829504] ffff8801d9579800 0000000000000000 ffff8801d6e3df80 ffffffff84629800 [ 613.837799] ffff8801db221c18 ffff8801d9597908 ffffffff839e8a8d ffff8801d957a0c8 [ 613.845849] ffffed003b2af418 ffff8801d9579800 00fffc0000000000 ffff8801db2224e8 [ 613.854179] Call Trace: [ 613.856794] [] ? __schedule+0x64d/0x1bd0 [ 613.862819] [] schedule+0x7f/0x1b0 [ 613.868223] [] schedule_preempt_disabled+0x13/0x20 [ 613.874791] [] mutex_lock_nested+0x326/0x870 [ 613.881744] [] ? n_tty_receive_buf_common+0xcfd/0x2300 [ 613.888916] [] ? mutex_trylock+0x3e0/0x3e0 [ 613.894791] [] n_tty_receive_buf_common+0xcfd/0x2300 [ 613.901920] [] ? mark_held_locks+0xc7/0x130 [ 613.908132] [] ? trace_hardirqs_on_caller+0x2a0/0x590 [ 613.914964] [] n_tty_receive_buf2+0x33/0x40 [ 613.921301] [] tty_ldisc_receive_buf+0xaf/0x190 [ 613.927861] [] ? n_tty_receive_buf_common+0x2300/0x2300 [ 613.934863] [] flush_to_ldisc+0x253/0x370 [ 613.940904] [] ? __lock_is_held+0xa2/0xf0 [ 613.946768] [] process_one_work+0x7e1/0x1500 [ 613.953110] [] ? process_one_work+0x728/0x1500 [ 613.959552] [] ? pwq_dec_nr_in_flight+0x2e0/0x2e0 [ 613.966034] [] worker_thread+0xd6/0x10a0 [ 613.972011] [] kthread+0x26d/0x300 [ 613.977197] [] ? process_one_work+0x1500/0x1500 [ 613.983765] [] ? kthread_park+0xa0/0xa0 [ 613.989601] [] ? kthread_park+0xa0/0xa0 [ 613.995218] [] ? kthread_park+0xa0/0xa0 [ 614.001083] [] ret_from_fork+0x5c/0x70 [ 614.006601] [ 614.006601] Showing all locks held in the system: [ 614.013791] 6 locks held by kworker/u4:2/45: [ 614.018199] #0: ("events_unbound"){.+.+.+}, at: [] process_one_work+0x6ee/0x1500 [ 614.027999] #1: ((&buf->work)){+.+...}, at: [] process_one_work+0x728/0x1500 [ 614.037470] #2: (&tty->ldisc_sem){++++++}, at: [] tty_ldisc_ref+0x20/0x80 [ 614.046632] #3: (&port->buf.lock/1){+.+...}, at: [] flush_to_ldisc+0x86/0x370 [ 614.056278] #4: (&o_tty->termios_rwsem/1){++++..}, at: [] n_tty_receive_buf_common+0x8b/0x2300 [ 614.067412] #5: (&ldata->output_lock){+.+...}, at: [] n_tty_receive_buf_common+0xcfd/0x2300 [ 614.078172] 2 locks held by khungtaskd/519: [ 614.082474] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 614.091299] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 614.101019] 2 locks held by getty/3770: [ 614.104970] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 614.114319] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 614.124271] [ 614.125877] ============================================= [ 614.125877] [ 614.133513] NMI backtrace for cpu 1 [ 614.137133] CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.109-ge1815b3 #49 [ 614.144409] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.153746] ffff8801d85d7d08 ffffffff81eb3e29 0000000000000000 0000000000000001 [ 614.161766] 0000000000000001 0000000000000001 ffffffff810b9580 ffff8801d85d7d40 [ 614.169795] ffffffff81ebf127 0000000000000001 0000000000000000 0000000000000003 [ 614.177827] Call Trace: [ 614.180427] [] dump_stack+0xc1/0x128 [ 614.185821] [] ? irq_force_complete_move+0x320/0x320 [ 614.192559] [] nmi_cpu_backtrace.cold.2+0x48/0x87 [ 614.199034] [] ? irq_force_complete_move+0x320/0x320 [ 614.205773] [] nmi_trigger_cpumask_backtrace+0x12a/0x14f [ 614.212858] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 614.219855] [] watchdog+0x6b4/0xa20 [ 614.225118] [] ? watchdog+0x11c/0xa20 [ 614.230901] [] kthread+0x26d/0x300 [ 614.236079] [] ? reset_hung_task_detector+0x20/0x20 [ 614.242748] [] ? kthread_park+0xa0/0xa0 [ 614.248383] [] ? kthread_park+0xa0/0xa0 [ 614.253991] [] ? kthread_park+0xa0/0xa0 [ 614.259602] [] ret_from_fork+0x5c/0x70 [ 614.265207] Sending NMI from CPU 1 to CPUs 0: [ 614.270179] NMI backtrace for cpu 0 [ 614.273897] CPU: 0 PID: 4320 Comm: syz-executor957 Not tainted 4.9.109-ge1815b3 #49 [ 614.281667] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.291000] task: ffff8801c6ceb000 task.stack: ffff8801c5df8000 [ 614.297034] RIP: 0010:[] c [] __process_echoes+0x5e2/0x780 [ 614.305856] RSP: 0018:ffff8801c5dff980 EFLAGS: 00000206 [ 614.311280] RAX: 0000000000000622 RBX: ffffc90000d65000 RCX: 0000000000000000 [ 614.318548] RDX: ffffc90000d66882 RSI: ffffffff8211bb8f RDI: ffffc90000d66882 [ 614.325793] RBP: ffff8801c5dff9e8 R08: ffff8801c6ceb938 R09: 0000000000000000 [ 614.333045] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000b320b6622 [ 614.340329] R13: 00000000000036e1 R14: dffffc0000000000 R15: 0000000b320b6622 [ 614.347579] FS: 00007fb1bf144700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 614.355782] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 614.361644] CR2: 00007ff694b9e000 CR3: 00000001d6dd0000 CR4: 00000000001606f0 [ 614.368894] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 614.376145] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 614.383392] Stack: [ 614.385519] ffff8801c5dff9c0c 0000000000000000c ffffc90000d67278c ffffed003879ac25c [ 614.393724] ffff8801c3cd612cc ffffc90000d65020c 0000000000000b00c ffff8801c3cd5d80c [ 614.401927] ffffc90000d67300c ffffc90000d65000c dffffc0000000000c ffffc90000d65020c [ 614.410130] Call Trace: [ 614.412687] [] n_tty_receive_buf_common+0xd34/0x2300 [ 614.419411] [] n_tty_receive_buf+0x30/0x40 [ 614.425266] [] tty_ioctl+0xc8f/0x2270 [ 614.430688] [] ? no_tty+0xa0/0xa0 [ 614.435761] [] ? avc_ss_reset+0x100/0x110 [ 614.441547] [] ? __lock_acquire+0x654/0x4070 [ 614.447577] [] ? __might_sleep+0x95/0x1a0 [ 614.453350] [] ? no_tty+0xa0/0xa0 [ 614.458430] [] do_vfs_ioctl+0x1ac/0x11a0 [ 614.464118] [] ? ioctl_preallocate+0x220/0x220 [ 614.470410] [] ? selinux_capable+0x40/0x40 [ 614.476285] [] ? __fget+0x20a/0x3b0 [ 614.481539] [] ? __fget+0x231/0x3b0 [ 614.486788] [] ? __fget+0x47/0x3b0 [ 614.491961] [] ? security_file_ioctl+0x8f/0xc0 [ 614.498170] [] SyS_ioctl+0x8f/0xc0 [ 614.503334] [] ? do_vfs_ioctl+0x11a0/0x11a0 [ 614.509292] [] do_syscall_64+0x1a6/0x490 [ 614.514976] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 614.521883] Code: cff c4c c89 ce8 c4c c29 ce0 c48 c3d cdf c0e c00 c00 c0f c86 ced cfb cff cff ce8 cb1 c2d c24 cff c4c c89 ce0 c25 cff c0f c00 c00 c48 c8d cbc c03 c60 c12 c00 c00 c48 c89 cfa c<48> c89 cf9 c48 cc1 cea c03 c83 ce1 c07 c42 c0f cb6 c14 c32 c38 cca c7f c08 c84 cd2 c [ 614.554645] Kernel panic - not syncing: hung_task: blocked tasks [ 614.560900] CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.109-ge1815b3 #49 [ 614.568159] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 614.577504] ffff8801d85d7cc8 ffffffff81eb3e29 ffffffff83c8bbe0 00000000ffffffff [ 614.585556] 0000000000000000 0000000000000001 dffffc0000000000 ffff8801d85d7d88 [ 614.593608] ffffffff81421925 0000000041b58ab3 ffffffff843b9a40 ffffffff81421766 [ 614.601719] Call Trace: [ 614.604308] [] dump_stack+0xc1/0x128 [ 614.609660] [] panic+0x1bf/0x3bc [ 614.614671] [] ? add_taint.cold.6+0x16/0x16 [ 614.620629] [] ? ___preempt_schedule+0x16/0x18 [ 614.626845] [] ? nmi_trigger_cpumask_backtrace+0x100/0x14f [ 614.634481] [] watchdog+0x6c5/0xa20 [ 614.639747] [] ? watchdog+0x11c/0xa20 [ 614.645196] [] kthread+0x26d/0x300 [ 614.650372] [] ? reset_hung_task_detector+0x20/0x20 [ 614.657035] [] ? kthread_park+0xa0/0xa0 [ 614.662651] [] ? kthread_park+0xa0/0xa0 [ 614.668261] [] ? kthread_park+0xa0/0xa0 [ 614.673876] [] ret_from_fork+0x5c/0x70 [ 614.680091] Dumping ftrace buffer: [ 614.683673] (ftrace buffer empty) [ 614.687360] Kernel Offset: disabled [ 614.690984] Rebooting in 86400 seconds..