INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "4" respawning too fast: disabled for 5 minutes Warning: Permanently added '10.128.15.202' (ECDSA) to the list of known hosts. 2019/02/17 03:29:04 parsed 1 programs 2019/02/17 03:29:07 executed programs: 0 INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "6" 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 [ 981.592782] INFO: task syz-executor.0:2216 blocked for more than 140 seconds. [ 981.600550] Not tainted 4.4.174+ #4 [ 981.604833] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 981.612848] syz-executor.0 D ffff8800b4a679d8 25008 2216 1 0x00000004 [ 981.620604] ffff8800b4a679d8 ffff8801d15117c0 d27fb4e80f44978c ffff8801d15117c0 [ 981.629063] 0000000000000001 ffff8801d1512000 ffff8801db61f180 ffff8801db61f1a8 [ 981.637422] ffff8801db61e898 ffff8801da6497c0 ffff8801d15117c0 ffffed001694c001 [ 981.646091] Call Trace: [ 981.648975] [] schedule+0x99/0x1d0 [ 981.654306] [] schedule_preempt_disabled+0x13/0x20 [ 981.661278] [] mutex_lock_nested+0x3c2/0xb80 [ 981.667571] [] ? blkdev_reread_part+0x1f/0x40 [ 981.674019] [] ? find_next_bit+0x44/0x50 [ 981.680479] [] ? mutex_trylock+0x500/0x500 [ 981.687223] [] ? trace_hardirqs_on_caller+0x385/0x5a0 [ 981.694393] [] blkdev_reread_part+0x1f/0x40 [ 981.700486] [] loop_reread_partitions+0x7c/0x90 [ 981.707010] [] loop_clr_fd+0x7f1/0xa70 [ 981.712604] [] lo_ioctl+0x7b6/0x1a70 [ 981.718248] [] ? debug_check_no_obj_freed+0x159/0x6e0 [ 981.725333] [] ? loop_queue_work+0x2290/0x2290 [ 981.731695] [] blkdev_ioctl+0xed9/0x1940 [ 981.737635] [] ? blkpg_ioctl+0x900/0x900 [ 981.743720] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 981.750773] [] ? debug_check_no_obj_freed+0x2b9/0x6e0 [ 981.757825] [] ? get_unused_fd_flags+0xd0/0xd0 [ 981.764110] [] ? check_preemption_disabled+0x3c/0x200 [ 981.771049] [] ? check_preemption_disabled+0x3c/0x200 [ 981.778071] [] block_ioctl+0xde/0x120 [ 981.783823] [] ? blkdev_read_iter+0x160/0x160 [ 981.790237] [] do_vfs_ioctl+0x6e7/0xfa0 [ 981.796140] [] ? selinux_parse_skb.constprop.0+0x16b0/0x16b0 [ 981.803646] [] ? ioctl_preallocate+0x200/0x200 [ 981.810016] [] ? do_sys_open+0x237/0x600 [ 981.815908] [] ? filp_open+0x70/0x70 [ 981.822292] [] ? SyS_mkdirat+0x164/0x250 [ 981.828657] [] ? task_work_run+0x251/0x2b0 [ 981.834963] [] ? security_file_ioctl+0x8f/0xc0 [ 981.841452] [] SyS_ioctl+0x8f/0xc0 [ 981.847031] [] entry_SYSCALL_64_fastpath+0x1e/0x9a [ 981.853697] 2 locks held by syz-executor.0/2216: [ 981.858522] #0: (loop_ctl_mutex/1){+.+.+.}, at: [] lo_ioctl+0x85/0x1a70 [ 981.869303] #1: (&bdev->bd_mutex){+.+.+.}, at: [] blkdev_reread_part+0x1f/0x40 [ 981.879304] Sending NMI to all CPUs: [ 981.889213] NMI backtrace for cpu 0 [ 981.892876] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.4.174+ #4 [ 981.899098] task: ffffffff82e151c0 task.stack: ffffffff82e00000 [ 981.905796] RIP: 0010:[] [] native_safe_halt+0x2/0x10 [ 981.914636] RSP: 0018:ffffffff82e07db0 EFLAGS: 00000246 [ 981.920414] RAX: 0000000000000007 RBX: ffffffff8319bf68 RCX: 0000000000000000 [ 981.927981] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff82e15a84 [ 981.935528] RBP: ffffffff82e07de0 R08: 0000000000000000 R09: 0000000000000000 [ 981.943762] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 981.951229] R13: ffffffff82e08000 R14: dffffc0000000000 R15: ffffffff82e00000 [ 981.958576] FS: 0000000000000000(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 [ 981.967235] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 981.973245] CR2: 0000000000e81000 CR3: 00000000b91ed000 CR4: 00000000001606b0 [ 981.980657] Stack: [ 981.982931] ffffffff81020b16 ffffffff82e00000 0000000000000000 ffffffff82e08000 [ 981.990783] dffffc0000000000 ffffffff82e00000 ffffffff82e07df0 ffffffff81022d50 [ 981.998427] ffffffff82e07e08 ffffffff811eb4c8 0000000000000000 ffffffff82e07ed0 [ 982.006295] Call Trace: [ 982.008873] [] ? default_idle+0x56/0x3d0 [ 982.014823] [] arch_cpu_idle+0x10/0x20 [ 982.020636] [] default_idle_call+0x48/0x70 [ 982.027135] [] cpu_startup_entry+0x6d1/0x810 [ 982.033258] [] ? complete+0x18/0x70 [ 982.038591] [] ? call_cpuidle+0xe0/0xe0 [ 982.044565] [] ? schedule+0xab/0x1d0 [ 982.049933] [] rest_init+0x190/0x199 [ 982.055408] [] ? trace_event_define_fields_x86_irq_vector+0x2c/0x2c [ 982.064849] [] start_kernel+0x64a/0x67e [ 982.073090] [] ? thread_stack_cache_init+0xb/0xb [ 982.083138] [] ? early_idt_handler_array+0x120/0x120 [ 982.106806] [] ? early_idt_handler_array+0x120/0x120 [ 982.114175] [] x86_64_start_reservations+0x29/0x2b [ 982.120779] [] x86_64_start_kernel+0x137/0x15a [ 982.127437] Code: 2e 0f 1f 84 00 00 00 00 00 fa c3 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 fb c3 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 fb f4 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 f4 c3 0f 1f 40 00 66 [ 982.150638] NMI backtrace for cpu 1 [ 982.154323] CPU: 1 PID: 20 Comm: khungtaskd Not tainted 4.4.174+ #4 [ 982.160965] task: ffff8801da6c2f80 task.stack: ffff8800001e8000 [ 982.167214] RIP: 0010:[] [] flat_send_IPI_mask+0xf7/0x1b0 [ 982.176221] RSP: 0018:ffff8800001efc88 EFLAGS: 00000046 [ 982.181722] RAX: 0000000000000000 RBX: 0000000000000c00 RCX: 0000000000000000 [ 982.189166] RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fc300 [ 982.196558] RBP: ffff8800001efcb8 R08: 0000000000000018 R09: 0000000000000000 [ 982.204148] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246 [ 982.211561] R13: 0000000003000000 R14: ffffffff82e5f2e0 R15: 0000000000000002 [ 982.219064] FS: 0000000000000000(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 [ 982.229320] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 982.235268] CR2: 00000000007831ec CR3: 00000001d4ea2000 CR4: 00000000001606b0 [ 982.242813] Stack: [ 982.245055] 0000000000000001 ffffffff82e5f2e0 ffffffff831a6ac0 fffffbfff0634c34 [ 982.253187] 000000000001b6c0 0000000000000008 ffff8800001efcd8 ffffffff81092bee [ 982.260943] 0000000000000008 ffffffff82924260 ffff8800001efd30 ffffffff81ab8252 [ 982.268583] Call Trace: [ 982.271357] [] nmi_raise_cpu_backtrace+0x5e/0x80 [ 982.278011] [] nmi_trigger_all_cpu_backtrace.cold+0xa1/0xae [ 982.285652] [] ? print_lock+0xa8/0xab [ 982.291230] [] ? irq_force_complete_move+0x330/0x330 [ 982.298125] [] arch_trigger_all_cpu_backtrace+0x14/0x20 [ 982.305300] [] watchdog.cold+0xd3/0xee [ 982.311037] [] ? watchdog+0xac/0xa00 [ 982.316804] [] ? reset_hung_task_detector+0x20/0x20 [ 982.323611] [] kthread+0x273/0x310 [ 982.329187] [] ? kthread_create_on_node+0x4c0/0x4c0 [ 982.335922] [] ? _raw_spin_unlock_irq+0x39/0x60 [ 982.342678] [] ? finish_task_switch+0x1e1/0x660 [ 982.350381] [] ? finish_task_switch+0x1b3/0x660 [ 982.357342] [] ? __schedule+0x7af/0x1ee0 [ 982.364819] [] ? __schedule+0x7a3/0x1ee0 [ 982.371555] [] ? __schedule+0x7af/0x1ee0 [ 982.377789] [] ? kthread_create_on_node+0x4c0/0x4c0 [ 982.384560] [] ret_from_fork+0x55/0x80 [ 982.390106] [] ? kthread_create_on_node+0x4c0/0x4c0 [ 982.397182] Code: 00 c3 5f ff 80 e6 10 75 e1 41 c1 e5 18 44 89 2c 25 10 c3 5f ff 44 89 fa 09 da 80 cf 04 41 83 ff 02 0f 44 d3 89 14 25 00 c3 5f ff <41> f7 c4 00 02 00 00 75 1e 4c 89 e7 57 9d 0f 1f 44 00 00 e8 f1 [ 982.416917] Kernel panic - not syncing: hung_task: blocked tasks [ 982.423806] CPU: 1 PID: 20 Comm: khungtaskd Not tainted 4.4.174+ #4 [ 982.430307] 0000000000000000 7c5c0c45242c4d23 ffff8800001efc60 ffffffff81aad1a1 [ 982.438726] ffff8801d15117c0 ffffffff82872120 dffffc0000000000 0000000000000002 [ 982.447142] 00000000003fff99 ffff8800001efd40 ffffffff813a48c2 0000000041b58ab3 [ 982.455349] Call Trace: [ 982.457931] [] dump_stack+0xc1/0x120 [ 982.463363] [] panic+0x1b9/0x37b [ 982.468629] [] ? add_taint.cold+0x16/0x16 [ 982.474635] [] ? find_next_bit+0x44/0x50 [ 982.480568] [] ? nmi_trigger_all_cpu_backtrace+0x3c6/0x490 [ 982.488250] [] ? nmi_trigger_all_cpu_backtrace+0x3c6/0x490 [ 982.496319] [] watchdog.cold+0xe4/0xee [ 982.501870] [] ? watchdog+0xac/0xa00 [ 982.507237] [] ? reset_hung_task_detector+0x20/0x20 [ 982.514253] [] kthread+0x273/0x310 [ 982.519494] [] ? kthread_create_on_node+0x4c0/0x4c0 [ 982.526168] [] ? _raw_spin_unlock_irq+0x39/0x60 [ 982.533095] [] ? finish_task_switch+0x1e1/0x660 [ 982.539581] [] ? finish_task_switch+0x1b3/0x660 [ 982.545979] [] ? __schedule+0x7af/0x1ee0 [ 982.551931] [] ? __schedule+0x7a3/0x1ee0 [ 982.558895] [] ? __schedule+0x7af/0x1ee0 [ 982.564792] [] ? kthread_create_on_node+0x4c0/0x4c0 [ 982.571803] [] ret_from_fork+0x55/0x80 [ 982.578028] [] ? kthread_create_on_node+0x4c0/0x4c0 [ 982.586035] Kernel Offset: disabled [ 982.589924] Rebooting in 86400 seconds..