1 TITLE: INFO: task hung in console_device 2 3 [ 722.253714] INFO: task init:1 blocked for more than 120 seconds. 4 [ 722.253718] Not tainted 4.4.135-g98b6097 #58 5 [ 722.253720] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 6 [ 722.253739] init D ffff8801d99b7570 24064 1 0 0x00000004 7 [ 722.253809] ffff8801d99b7570 ffff8801d99a88e0 000000000000017c ffff8801d99a8902 8 [ 722.253817] ffff8801d99a8900 ffff8801db31fdb8 ffff8801db31fde0 ffff8801db31f4d8 9 [ 722.253826] ffff8801db31f4c0 ffff8801d9a09800 ffff8801d99a8000 0000000000000000 10 [ 722.253827] Call Trace: 11 [ 722.253882] [<ffffffff838b476a>] schedule+0x7a/0x1b0 12 [ 722.253912] [<ffffffff838bfb81>] schedule_timeout+0x481/0x8b0 13 [ 722.253919] [<ffffffff838bf700>] ? usleep_range+0x140/0x140 14 [ 722.253958] [<ffffffff81517a5b>] ? do_dentry_open+0x68b/0xbc0 15 [ 722.253996] [<ffffffff8122e4c7>] ? mark_held_locks+0xc7/0x130 16 [ 722.254003] [<ffffffff838c1cc7>] ? _raw_spin_unlock_irq+0x27/0x50 17 [ 722.254015] [<ffffffff8122e8bb>] ? trace_hardirqs_on_caller+0x38b/0x590 18 [ 722.254021] [<ffffffff838bd235>] __down+0x125/0x1d0 19 [ 722.254028] [<ffffffff838bd110>] ? ww_mutex_unlock+0x300/0x300 20 [ 722.254035] [<ffffffff8122562e>] down+0x5e/0x80 21 [ 722.254043] [<ffffffff8125853c>] console_lock+0x2c/0x80 22 [ 722.254064] [<ffffffff814f4e94>] ? kmem_cache_alloc_trace+0x104/0x2c0 23 [ 722.254070] [<ffffffff8125dc8c>] console_device+0x1c/0xc0 24 [ 722.254095] [<ffffffff8204cfdf>] tty_open+0x8bf/0xf00 25 [ 722.254102] [<ffffffff8204c720>] ? tty_init_dev+0x430/0x430 26 [ 722.254112] [<ffffffff81529477>] ? chrdev_open+0xc7/0x4c0 27 [ 722.254119] [<ffffffff8204c720>] ? tty_init_dev+0x430/0x430 28 [ 722.254125] [<ffffffff815295dd>] chrdev_open+0x22d/0x4c0 29 [ 722.254131] [<ffffffff815293b0>] ? cdev_put.part.0+0x50/0x50 30 [ 722.254137] [<ffffffff81517a5b>] do_dentry_open+0x68b/0xbc0 31 [ 722.254145] [<ffffffff8153c0ab>] ? __inode_permission2+0x9b/0x240 32 [ 722.254151] [<ffffffff815293b0>] ? cdev_put.part.0+0x50/0x50 33 [ 722.254157] [<ffffffff8151b08a>] vfs_open+0x12a/0x210 34 [ 722.254164] [<ffffffff8153d826>] ? may_open.isra.40+0x156/0x240 35 [ 722.254171] [<ffffffff8154c12e>] path_openat+0x4ee/0x3a10 36 [ 722.254195] [<ffffffff81eb7719>] ? depot_save_stack+0x1c9/0x610 37 [ 722.254203] [<ffffffff8154bc40>] ? path_lookupat.isra.36+0x410/0x410 38 [ 722.254210] [<ffffffff8154fb67>] ? getname_flags+0xc7/0x580 39 [ 722.254216] [<ffffffff81550039>] ? getname+0x19/0x20 40 [ 722.254222] [<ffffffff8151b893>] ? do_sys_open+0x203/0x610 41 [ 722.254228] [<ffffffff8151bccd>] ? SyS_open+0x2d/0x40 42 [ 722.254235] [<ffffffff838c27a5>] ? entry_SYSCALL_64_fastpath+0x22/0x9e 43 [ 722.254243] [<ffffffff8122f030>] ? debug_check_no_locks_freed+0x210/0x210 44 [ 722.254250] [<ffffffff81229682>] ? __lock_is_held+0xa2/0xf0 45 [ 722.254258] [<ffffffff81552367>] do_filp_open+0x197/0x270 46 [ 722.254265] [<ffffffff815521d0>] ? user_path_mountpoint_at+0x70/0x70 47 [ 722.254272] [<ffffffff838c1c3c>] ? _raw_spin_unlock+0x2c/0x50 48 [ 722.254284] [<ffffffff81579f83>] ? __alloc_fd+0x1f3/0x4a0 49 [ 722.254291] [<ffffffff8151b9ac>] do_sys_open+0x31c/0x610 50 [ 722.254297] [<ffffffff8151b690>] ? filp_open+0x70/0x70 51 [ 722.254318] [<ffffffff81160650>] ? sigprocmask+0x290/0x290 52 [ 722.254324] [<ffffffff8151bccd>] SyS_open+0x2d/0x40 53 [ 722.254331] [<ffffffff838c27a5>] entry_SYSCALL_64_fastpath+0x22/0x9e 54 [ 722.254336] 1 lock held by init/1: 55 [ 722.254351] #0: (tty_mutex){+.+.+.}, at: [<ffffffff8204cc5e>] tty_open+0x53e/0xf00 56 [ 722.254355] Sending NMI to all CPUs: 57 [ 722.255664] NMI backtrace for cpu 0 58 [ 722.255667] CPU: 0 PID: 3960 Comm: syz-executor617 Not tainted 4.4.135-g98b6097 #58 59 [ 722.255671] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 60 [ 722.255674] task: ffff8800bb13e000 task.stack: ffff8800b9b08000 61 [ 722.255677] RIP: 0010:[<ffffffff82083f5b>] [<ffffffff82083f5b>] io_serial_in+0x6b/0x90 62 [ 722.255680] RSP: 0018:ffff8800b9b0f7f0 EFLAGS: 00000002 63 [ 722.255682] RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000 64 [ 722.255685] RDX: 00000000000003fd RSI: ffffffff82083f01 RDI: ffffffff862aa4f8 65 [ 722.255688] RBP: ffff8800b9b0f800 R08: 0000000000000001 R09: 0000000000000000 66 [ 722.255691] R10: 0000000000000001 R11: ffffffff858ed15a R12: ffffffff862aa4c0 67 [ 722.255694] R13: 0000000000000020 R14: fffffbfff0c554df R15: fffffbfff0c554a1 68 [ 722.255698] FS: 0000000002477880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000 69 [ 722.255700] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 70 [ 722.255703] CR2: 00000000006cf090 CR3: 00000000b10e2000 CR4: 00000000001606f0 71 [ 722.255706] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 72 [ 722.255709] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 73 [ 722.255711] Stack: 74 [ 722.255714] ffffffff862aa4c0 0000000000002710 ffff8800b9b0f850 ffffffff82085abf 75 [ 722.255717] ffffffff81e37875 ffffffff862aa508 ffffffff862aa6fa ffffffff862aa4c0 76 [ 722.255720] 0000000000000020 ffffffff82085c10 dffffc0000000000 0000000000000020 77 [ 722.255722] Call Trace: 78 [ 722.255724] [<ffffffff82085abf>] wait_for_xmitr+0x8f/0x1e0 79 [ 722.255727] [<ffffffff81e37875>] ? vsnprintf+0x1a5/0x18e0 80 [ 722.255730] [<ffffffff82085c10>] ? wait_for_xmitr+0x1e0/0x1e0 81 [ 722.255732] [<ffffffff82085c2f>] serial8250_console_putchar+0x1f/0x60 82 [ 722.255735] [<ffffffff820700c9>] uart_console_write+0x59/0xf0 83 [ 722.255738] [<ffffffff82090289>] serial8250_console_write+0x539/0x830 84 [ 722.255741] [<ffffffff8208fd50>] ? exar_handle_irq+0x1c0/0x1c0 85 [ 722.255743] [<ffffffff81e39240>] ? scnprintf+0x110/0x110 86 [ 722.255746] [<ffffffff81003017>] ? trace_hardirqs_on_thunk+0x17/0x19 87 [ 722.255749] [<ffffffff8207ec10>] ? univ8250_console_setup+0xf0/0xf0 88 [ 722.255752] [<ffffffff8207ec6f>] univ8250_console_write+0x5f/0x70 89 [ 722.255755] [<ffffffff81259f1f>] call_console_drivers.constprop.28+0x1ef/0x3f0 90 [ 722.255757] [<ffffffff8125cbf5>] console_unlock+0x605/0xa10 91 [ 722.255760] [<ffffffff8125d51e>] vprintk_emit+0x51e/0x840 92 [ 722.255762] [<ffffffff8125d868>] vprintk+0x28/0x30 93 [ 722.255765] [<ffffffff8125d88d>] vprintk_default+0x1d/0x30 94 [ 722.255767] [<ffffffff814152a8>] printk+0xaf/0xd7 95 [ 722.255770] [<ffffffff814151f9>] ? log_wakeup_reason.cold.1+0x13f/0x13f 96 [ 722.255773] [<ffffffff82dd0fcc>] binder_ioctl.cold.83+0x91/0x132 97 [ 722.255776] [<ffffffff82d7cff0>] ? binder_ioctl_write_read.isra.47+0x920/0x920 98 [ 722.255779] [<ffffffff8146ccd7>] ? vm_mmap_pgoff+0x177/0x1b0 99 [ 722.255782] [<ffffffff82d7cff0>] ? binder_ioctl_write_read.isra.47+0x920/0x920 100 [ 722.255784] [<ffffffff81559bbf>] do_vfs_ioctl+0x63f/0xf40 101 [ 722.255787] [<ffffffff81559580>] ? ioctl_preallocate+0x1f0/0x1f0 102 [ 722.255790] [<ffffffff815229d0>] ? fput+0x20/0x150 103 [ 722.255792] [<ffffffff814ab7c8>] ? SyS_mmap_pgoff+0xd8/0x550 104 [ 722.255795] [<ffffffff81c4dccf>] ? security_file_ioctl+0x8f/0xc0 105 [ 722.255797] [<ffffffff8155a54f>] SyS_ioctl+0x8f/0xc0 106 [ 722.255800] [<ffffffff838c27a5>] entry_SYSCALL_64_fastpath+0x22/0x9e 107 [ 722.255806] Code: 24 c1 00 00 00 49 8d 7c 24 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 d3 e3 80 3c 02 00 75 17 41 03 5c 24 38 89 da ec <5b> 0f b6 c0 41 5c 5d c3 e8 78 57 47 ff eb c2 e8 d1 57 47 ff eb 108 [ 722.255809] NMI backtrace for cpu 1 109 [ 722.255811] CPU: 1 PID: 492 Comm: khungtaskd Not tainted 4.4.135-g98b6097 #58 110 [ 722.255815] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 111 [ 722.255818] task: ffff8801d8ca0000 task.stack: ffff8801d8d20000 112 [ 722.255821] RIP: 0010:[<ffffffff810bfeb6>] [<ffffffff810bfeb6>] flat_send_IPI_mask+0xf6/0x1a0 113 [ 722.255824] RSP: 0018:ffff8801d8d27cc8 EFLAGS: 00000046 114 [ 722.255827] RAX: 0000000003000000 RBX: 0000000000000c00 RCX: 0000000000000000 115 [ 722.255830] RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fb300 116 [ 722.255833] RBP: ffff8801d8d27cf0 R08: 0000000000000001 R09: 0000000000000000 117 [ 722.255836] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246 118 [ 722.255839] R13: 0000000000000003 R14: 0000000000000002 R15: ffffffff8446f7a0 119 [ 722.255842] FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 120 [ 722.255845] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 121 [ 722.255848] CR2: 0000000000ec0000 CR3: 00000000b2316000 CR4: 00000000001606f0 122 [ 722.255851] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 123 [ 722.255854] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 124 [ 722.255856] Stack: 125 [ 722.255859] ffffffff8446f7a0 ffffffff84a18e60 0000000000000007 fffffbfff0942c7c 126 [ 722.255862] 0000000000000040 ffff8801d8d27d10 ffffffff810b5e71 ffffffff83c0b560 127 [ 722.255865] 0000000000000003 ffff8801d8d27d68 ffffffff81e19da3 ffffffff8140dcef 128 [ 722.255867] Call Trace: 129 [ 722.255869] [<ffffffff810b5e71>] nmi_raise_cpu_backtrace+0x61/0x80 130 [ 722.255872] [<ffffffff81e19da3>] nmi_trigger_all_cpu_backtrace.cold.4+0x70/0xad 131 [ 722.255875] [<ffffffff8140dcef>] ? print_lock+0x9f/0xa2 132 [ 722.255878] [<ffffffff810b5e10>] ? irq_force_complete_move+0x350/0x350 133 [ 722.255881] [<ffffffff810b5f14>] arch_trigger_all_cpu_backtrace+0x14/0x20 134 [ 722.255883] [<ffffffff8141a3d9>] watchdog.cold.1+0xd3/0xee 135 [ 722.255886] [<ffffffff81358e40>] ? watchdog+0xb0/0x9a0 136 [ 722.255889] [<ffffffff81190958>] kthread+0x268/0x300 137 [ 722.255891] [<ffffffff81358d90>] ? reset_hung_task_detector+0x20/0x20 138 [ 722.255894] [<ffffffff811906f0>] ? kthread_create_on_node+0x400/0x400 139 [ 722.255897] [<ffffffff811906f0>] ? kthread_create_on_node+0x400/0x400 140 [ 722.255900] [<ffffffff838c2bd5>] ret_from_fork+0x55/0x80 141 [ 722.255902] [<ffffffff811906f0>] ? kthread_create_on_node+0x400/0x400 142 [ 722.255908] Code: b3 5f ff f6 c4 10 75 e2 44 89 e8 c1 e0 18 89 04 25 10 b3 5f ff 44 89 f2 09 da 80 cf 04 41 83 fe 02 0f 44 d3 89 14 25 00 b3 5f ff <41> f7 c4 00 02 00 00 75 1a 4c 89 e7 57 9d 0f 1f 44 00 00 e8 72 143 [ 722.256030] Kernel panic - not syncing: hung_task: blocked tasks 144 [ 722.256036] CPU: 1 PID: 492 Comm: khungtaskd Not tainted 4.4.135-g98b6097 #58 145 [ 722.256040] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 146 [ 722.256048] 0000000000000000 c6b8d4f7a3c1f5c6 ffff8801d8d27cb8 ffffffff81e0ed2d 147 [ 722.256056] ffffffff83a837c0 0000000000000003 7fffffffffffffff 00000000003fffff 148 [ 722.256064] dffffc0000000000 ffff8801d8d27d78 ffffffff8140a104 0000000041b58ab3 149 [ 722.256065] Call Trace: 150 [ 722.256072] [<ffffffff81e0ed2d>] dump_stack+0xc1/0x124 151 [ 722.256079] [<ffffffff8140a104>] panic+0x19e/0x38d 152 [ 722.256085] [<ffffffff81409f66>] ? add_taint.cold.4+0x16/0x16 153 [ 722.256092] [<ffffffff81e19bd5>] ? nmi_trigger_all_cpu_backtrace+0x395/0x488 154 [ 722.256099] [<ffffffff81e19bd5>] ? nmi_trigger_all_cpu_backtrace+0x395/0x488 155 [ 722.256105] [<ffffffff8141a3ea>] watchdog.cold.1+0xe4/0xee 156 [ 722.256112] [<ffffffff81358e40>] ? watchdog+0xb0/0x9a0 157 [ 722.256118] [<ffffffff81190958>] kthread+0x268/0x300 158 [ 722.256126] [<ffffffff81358d90>] ? reset_hung_task_detector+0x20/0x20 159 [ 722.256133] [<ffffffff811906f0>] ? kthread_create_on_node+0x400/0x400 160 [ 722.256140] [<ffffffff811906f0>] ? kthread_create_on_node+0x400/0x400 161 [ 722.256147] [<ffffffff838c2bd5>] ret_from_fork+0x55/0x80 162 [ 722.256154] [<ffffffff811906f0>] ? kthread_create_on_node+0x400/0x400 163 [ 722.260296] Dumping ftrace buffer: 164 [ 722.260319] (ftrace buffer empty) 165 [ 722.260321] Kernel Offset: disabled 166
