~y\xb2\xb3\xba\b;/\xb6&\xa5\xaa\xcec\x1e\x8a;\xea;P\xb5w_2\f\xe5\xcc`\xa0\xce\xf0+\x19v\xb9I\xdf\xfe\x13\xd9\x1a\xd6;+\x16\x05\x1aUl>\x82@\x0f\xdf\xcd\x99\x9a\x13\xe2[F\xf08\xa6D\x97\xb5\x1f\xf3\xe9\xd5\xbf\x13k\xbc)\xa1nbx\x9c\x02\xa6p?\x12\x89\nAr\xe9Q\xb0\x80Q\x8e\xf2\xf0yX\x9b\x96\xa4\x8b\x01f\xe0\x04\xbd\x93K!\xa0D-\xfc\x12\x02\xe2\xb5WQ\xb4\xb1\xf2\x16)\xc8\b\xc2\x99\x9a\xd9\xa6p\xedK\xb5\x8b\xe8\xbf\xa2\f\x9a\xa1\x13\xd78Mt$\x06\xb6c\xd0Y\x05\xd1l\x98| /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 859.374135] init D28888 32083 1 0x00000000 [ 859.374151] ffff8801c8a397c0 ffff8801d0b72100 ffff8801d1aee300 ffff8801d0344740 [ 859.374162] ffff8801db721018 ffff8801a9d6f580 ffffffff828075c2 ffff8801c8a3a070 [ 859.374172] 000000000000015c 0000000000000000 0000000000000000 ffff8801db7218f0 [ 859.374174] Call Trace: [ 859.374191] [] ? __schedule+0x662/0x1b10 [ 859.374199] [] ? __down+0x15a/0x2b0 [ 859.374206] [] schedule+0x7f/0x1b0 [ 859.374224] [] schedule_timeout+0x735/0xe20 [ 859.374232] [] ? usleep_range+0x140/0x140 [ 859.374241] [] ? do_dentry_open+0x3ef/0xc90 [ 859.374249] [] ? path_openat+0x542/0x2790 [ 859.374258] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 859.374266] [] ? mark_held_locks+0xc7/0x130 [ 859.374273] [] ? _raw_spin_unlock_irq+0x27/0x50 [ 859.374281] [] ? __down+0x15a/0x2b0 [ 859.374288] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 859.374296] [] ? __down+0x15a/0x2b0 [ 859.374303] [] __down+0x191/0x2b0 [ 859.374311] [] ? ww_mutex_unlock+0x300/0x300 [ 859.374320] [] down+0x5e/0x80 [ 859.374329] [] console_lock+0x2c/0x80 [ 859.374338] [] ? kmem_cache_alloc_trace+0x117/0x2e0 [ 859.374345] [] console_device+0x1c/0xc0 [ 859.374353] [] tty_open+0x6f5/0xdf0 [ 859.374361] [] ? tty_init_dev+0x430/0x430 [ 859.374369] [] ? chrdev_open+0xc7/0x5c0 [ 859.374388] [] ? tty_init_dev+0x430/0x430 [ 859.374443] [] chrdev_open+0x22d/0x5c0 [ 859.374456] [] ? cdev_put.part.0+0x50/0x50 [ 859.374496] [] do_dentry_open+0x3ef/0xc90 [ 859.374504] [] ? cdev_put.part.0+0x50/0x50 [ 859.374512] [] vfs_open+0x11c/0x210 [ 859.374519] [] ? may_open.isra.20+0x14f/0x2a0 [ 859.374527] [] path_openat+0x542/0x2790 [ 859.374534] [] ? path_mountpoint+0x6c0/0x6c0 [ 859.374542] [] ? trace_hardirqs_on+0x10/0x10 [ 859.374551] [] ? expand_files.part.3+0x3a9/0x6d0 [ 859.374559] [] do_filp_open+0x197/0x270 [ 859.374566] [] ? may_open_dev+0xe0/0xe0 [ 859.374574] [] ? _raw_spin_unlock+0x2c/0x50 [ 859.374582] [] ? __alloc_fd+0x1d7/0x4a0 [ 859.374590] [] do_sys_open+0x30d/0x5c0 [ 859.374599] [] ? filp_open+0x70/0x70 [ 859.374606] [] ? _raw_write_unlock_irq+0x27/0x50 [ 859.374615] [] SyS_open+0x2d/0x40 [ 859.374623] [] ? do_sys_open+0x5c0/0x5c0 [ 859.374636] [] do_syscall_64+0x19f/0x550 [ 859.374645] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 859.374648] [ 859.374648] Showing all locks held in the system: [ 859.374655] 2 locks held by khungtaskd/24: [ 859.374672] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 [ 859.374687] #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 [ 859.374694] 1 lock held by rsyslogd/1913: [ 859.374709] #0: (&f->f_pos_lock){+.+.+.}, at: [] __fdget_pos+0xac/0xd0 [ 859.374713] 2 locks held by getty/2040: [ 859.374728] #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 [ 859.374742] #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 [ 859.374748] 2 locks held by kworker/u4:1/25747: [ 859.374762] #0: ("events_unbound"){.+.+.+}, at: [] process_one_work+0x73c/0x15f0 [ 859.374776] #1: ((reaper_work).work){+.+...}, at: [] process_one_work+0x774/0x15f0 [ 859.374779] 1 lock held by init/32083: [ 859.374793] #0: (tty_mutex){+.+.+.}, at: [] tty_open+0x476/0xdf0 [ 859.374797] 1 lock held by init/32124: [ 859.374810] #0: (tty_mutex){+.+.+.}, at: [] tty_open+0x476/0xdf0 [ 859.374814] 1 lock held by init/32138: [ 859.374834] #0: (tty_mutex){+.+.+.}, at: [] tty_open+0x476/0xdf0 [ 859.374839] 1 lock held by init/32238: [ 859.374852] #0: (tty_mutex){+.+.+.}, at: [] tty_open+0x476/0xdf0 [ 859.374856] 1 lock held by init/32247: [ 859.374868] #0: (tty_mutex){+.+.+.}, at: [] tty_open+0x476/0xdf0 [ 859.374872] 1 lock held by init/32248: [ 859.374884] #0: (tty_mutex){+.+.+.}, at: [] tty_open+0x476/0xdf0 [ 859.374887] [ 859.374889] ============================================= [ 859.374889] [ 859.374893] NMI backtrace for cpu 1 [ 859.374901] CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.141+ #1 [ 859.374912] ffff8801d9907d08 ffffffff81b42e79 0000000000000000 0000000000000001 [ 859.374922] 0000000000000001 0000000000000001 ffffffff810983b0 ffff8801d9907d40 [ 859.374938] ffffffff81b4df89 0000000000000001 0000000000000000 0000000000000002 [ 859.374939] Call Trace: [ 859.374950] [] dump_stack+0xc1/0x128 [ 859.374960] [] ? irq_force_complete_move+0x330/0x330 [ 859.374967] [] nmi_cpu_backtrace.cold.0+0x48/0x87 [ 859.374976] [] ? irq_force_complete_move+0x330/0x330 [ 859.374984] [] nmi_trigger_cpumask_backtrace+0x12c/0x151 [ 859.374993] [] arch_trigger_cpumask_backtrace+0x14/0x20 [ 859.375000] [] watchdog+0x6ad/0xa20 [ 859.375007] [] ? watchdog+0x11c/0xa20 [ 859.375015] [] kthread+0x26d/0x300 [ 859.375023] [] ? reset_hung_task_detector+0x20/0x20 [ 859.375031] [] ? kthread_park+0xa0/0xa0 [ 859.375039] [] ? __switch_to_asm+0x34/0x70 [ 859.375047] [] ? kthread_park+0xa0/0xa0 [ 859.375054] [] ? kthread_park+0xa0/0xa0 [ 859.375061] [] ret_from_fork+0x5c/0x70 [ 859.375067] Sending NMI from CPU 1 to CPUs 0: [ 859.375466] NMI backtrace for cpu 0 [ 859.375470] CPU: 0 PID: 29326 Comm: syz-executor.2 Not tainted 4.9.141+ #1 [ 859.375473] task: ffff8801a7f05f00 task.stack: ffff8801c49f8000 [ 859.375477] RIP: 0010:[] c [] __tlb_remove_page_size+0x102/0x500 [ 859.375480] RSP: 0018:ffff8801c49ff6d8 EFLAGS: 00000a03 [ 859.375483] RAX: ffff8801cf88600c RBX: ffff8801c49ff920 RCX: ffff8801c49ff940 [ 859.375486] RDX: 0000000000000000 RSI: ffffffff814956f7 RDI: ffff8801cf88600c [ 859.375490] RBP: ffff8801c49ff708 R08: ffff8801a7f067d0 R09: 9e50ee563b4102ff [ 859.375493] R10: ffff8801a7f05f00 R11: 0000000000000001 R12: ffff8801cf886000 [ 859.375496] R13: 0000000000000041 R14: ffffea0006d06d40 R15: ffff8801cf886008 [ 859.375500] FS: 0000000000000000(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 [ 859.375503] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 859.375506] CR2: 0000001b2f221000 CR3: 000000000301e000 CR4: 00000000001606b0 [ 859.375508] Stack: [ 859.375512] ffffffff814be468c 00007f488412e000c 00007f488412f000c 0000000000000006c [ 859.375515] ffffea0006d06d40c ffff8801d2b49970c ffff8801c49ff868c ffffffff81499b10c [ 859.375518] 1ffff1003893fefcc dffffc0000000003c fffffbfff067cf3ac 0000000000000019c [ 859.375520] Call Trace: [ 859.375523] [] ? page_remove_rmap+0x98/0x280 [ 859.375526] [] unmap_page_range+0xe60/0x1680 [ 859.375528] [] ? do_wp_page+0x2010/0x2010 [ 859.375531] [] ? uprobe_munmap+0x94/0x220 [ 859.375534] [] unmap_single_vma+0x11c/0x170 [ 859.375537] [] unmap_vmas+0x81/0xd0 [ 859.375540] [] exit_mmap+0x1cc/0x3a0 [ 859.375542] [] ? SyS_munmap+0xa0/0xa0 [ 859.375545] [] ? __might_sleep+0x95/0x1a0 [ 859.375548] [] mmput+0xcd/0x360 [ 859.375551] [] do_exit+0x6c9/0x2a50 [ 859.375554] [] ? trace_hardirqs_on+0x10/0x10 [ 859.375557] [] ? release_task.part.4+0x14b0/0x14b0 [ 859.375559] [] ? mark_held_locks+0xc7/0x130 [ 859.375562] [] ? __dequeue_signal+0x79/0x5f0 [ 859.375566] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 859.375568] [] ? recalc_sigpending+0x72/0x90 [ 859.375571] [] ? dequeue_signal+0xc4/0x4b0 [ 859.375575] [] ? check_preemption_disabled+0x3b/0x200 [ 859.375577] [] do_group_exit+0x111/0x300 [ 859.375580] [] get_signal+0x4e1/0x1460 [ 859.375583] [] do_signal+0x95/0x1b00 [ 859.375586] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 859.375589] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 859.375592] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 859.375595] [] ? setup_sigcontext+0x7d0/0x7d0 [ 859.375598] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 859.375601] [] ? do_futex+0x1a30/0x1a30 [ 859.375604] [] ? exit_to_usermode_loop+0xbe/0x150 [ 859.375607] [] exit_to_usermode_loop+0x10e/0x150 [ 859.375609] [] do_syscall_64+0x3e2/0x550 [ 859.375612] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 859.375623] Code: c08 c3c c03 c0f c8e c6e c03 c00 c00 c49 c8d c7c c24 c0c c45 c8b c6c c24 c08 c48 cb8 c00 c00 c00 c00 c00 cfc cff cdf c48 c89 cfa c48 cc1 cea c03 c0f cb6 c14 c02 c48 c89 cf8 c<83> ce0 c07 c83 cc0 c03 c38 cd0 c7c c08 c84 cd2 c0f c85 c13 c03 c00 c00 c41 c8b c44 c [ 859.376086] Kernel panic - not syncing: hung_task: blocked tasks [ 859.376093] CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.141+ #1 [ 859.376106] ffff8801d9907cc8 ffffffff81b42e79 ffffffff82a78560 00000000ffffffff [ 859.376116] 0000000000000000 0000000000000001 dffffc0000000000 ffff8801d9907d88 [ 859.376127] ffffffff813f7125 0000000041b58ab3 ffffffff82e2b62b ffffffff813f6f66 [ 859.376128] Call Trace: [ 859.376138] [] dump_stack+0xc1/0x128 [ 859.376145] [] panic+0x1bf/0x39f [ 859.376153] [] ? add_taint.cold.5+0x16/0x16 [ 859.376161] [] ? nmi_trigger_cpumask_backtrace+0x102/0x151 [ 859.376169] [] watchdog+0x6be/0xa20 [ 859.376176] [] ? watchdog+0x11c/0xa20 [ 859.376184] [] kthread+0x26d/0x300 [ 859.376192] [] ? reset_hung_task_detector+0x20/0x20 [ 859.376199] [] ? kthread_park+0xa0/0xa0 [ 859.376207] [] ? __switch_to_asm+0x34/0x70 [ 859.376214] [] ? kthread_park+0xa0/0xa0 [ 859.376221] [] ? kthread_park+0xa0/0xa0 [ 859.376228] [] ret_from_fork+0x5c/0x70 [ 859.376559] Kernel Offset: disabled