Warning: Permanently added '10.128.0.44' (ECDSA) to the list of known hosts. executing program [ 484.796404] block nbd0: shutting down sockets [ 717.738294] INFO: task syz-executor869:8141 blocked for more than 140 seconds. [ 717.745928] Not tainted 4.19.171-syzkaller #0 [ 717.751181] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.759236] syz-executor869 D27544 8141 8140 0x00000004 [ 717.764969] Call Trace: [ 717.767542] __schedule+0x887/0x2040 [ 717.771909] ? io_schedule_timeout+0x140/0x140 [ 717.776508] ? mark_held_locks+0xf0/0xf0 [ 717.780801] schedule+0x8d/0x1b0 [ 717.784306] schedule_timeout+0x92d/0xfe0 [ 717.788514] ? usleep_range+0x170/0x170 [ 717.792494] ? wait_for_common+0x294/0x470 [ 717.796735] ? lock_downgrade+0x720/0x720 [ 717.800996] ? lock_acquire+0x170/0x3c0 [ 717.804998] ? wait_for_common+0x9e/0x470 [ 717.809201] ? _raw_spin_unlock_irq+0x24/0x80 [ 717.813731] wait_for_common+0x29c/0x470 [ 717.817783] ? bit_wait_io_timeout+0x100/0x100 [ 717.822449] ? __mutex_unlock_slowpath+0xea/0x610 [ 717.827294] ? wake_up_q+0xe0/0xe0 [ 717.830897] ? check_flush_dependency+0x86/0x400 [ 717.835669] flush_workqueue+0x40b/0x13e0 [ 717.839911] ? lock_downgrade+0x720/0x720 [ 717.844068] ? lock_acquire+0x170/0x3c0 [ 717.848031] ? check_flush_dependency+0x400/0x400 [ 717.852945] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 717.858192] ? prepare_to_wait_exclusive+0x2d0/0x2d0 [ 717.863317] ? sock_shutdown+0x97/0x240 [ 717.867280] nbd_ioctl+0x75b/0xbe0 [ 717.870885] ? nbd_disconnect_and_put+0x190/0x190 [ 717.875750] ? wait_woken+0x250/0x250 [ 717.879643] ? __lockdep_init_map+0x100/0x5a0 [ 717.884142] ? nbd_disconnect_and_put+0x190/0x190 [ 717.889056] blkdev_ioctl+0x5cb/0x1a80 [ 717.892961] ? blkpg_ioctl+0x9d0/0x9d0 [ 717.896841] ? __lock_acquire+0x6de/0x3ff0 [ 717.901753] ? percpu_counter_add_batch+0x126/0x180 [ 717.906796] ? mark_held_locks+0xf0/0xf0 [ 717.910933] block_ioctl+0xe9/0x130 [ 717.914572] ? blkdev_fallocate+0x3f0/0x3f0 [ 717.918969] do_vfs_ioctl+0xcdb/0x12e0 [ 717.922865] ? ioctl_preallocate+0x200/0x200 [ 717.927258] ? __alloc_fd+0x28d/0x570 [ 717.931116] ? __fd_install+0x1b4/0x610 [ 717.935103] ? lock_downgrade+0x720/0x720 [ 717.939322] ? check_preemption_disabled+0x41/0x280 [ 717.944350] ksys_ioctl+0x9b/0xc0 [ 717.947789] __x64_sys_ioctl+0x6f/0xb0 [ 717.951730] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 717.956322] do_syscall_64+0xf9/0x620 [ 717.960198] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.965386] RIP: 0033:0x444fc9 [ 717.968652] Code: Bad RIP value. [ 717.972015] RSP: 002b:00007ffd997800e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 717.979793] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000444fc9 [ 717.987067] RDX: 00000000ffffffff RSI: 000000000000ab03 RDI: 0000000000000005 [ 717.994393] RBP: 00000000006cf018 R08: 00000000004002e0 R09: 00000000004002e0 [ 718.001760] R10: 00000000004002e0 R11: 0000000000000246 R12: 0000000000402190 [ 718.009073] R13: 0000000000402220 R14: 0000000000000000 R15: 0000000000000000 [ 718.016377] [ 718.016377] Showing all locks held in the system: [ 718.022791] 1 lock held by khungtaskd/1567: [ 718.027103] #0: 00000000020e6db6 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 [ 718.036367] 2 locks held by kworker/u5:0/1713: [ 718.041037] #0: 0000000078638dba ((wq_completion)"knbd%d-recv"nbd->index){+.+.}, at: process_one_work+0x767/0x1570 [ 718.051710] #1: 000000006f64415f ((work_completion)(&args->work)){+.+.}, at: process_one_work+0x79c/0x1570 [ 718.061725] [ 718.063349] ============================================= [ 718.063349] [ 718.070440] NMI backtrace for cpu 0 [ 718.074073] CPU: 0 PID: 1567 Comm: khungtaskd Not tainted 4.19.171-syzkaller #0 [ 718.081504] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.090840] Call Trace: [ 718.093426] dump_stack+0x1fc/0x2ef [ 718.097042] nmi_cpu_backtrace.cold+0x63/0xa2 [ 718.101522] ? lapic_can_unplug_cpu+0x80/0x80 [ 718.106000] nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 [ 718.111260] watchdog+0x991/0xe60 [ 718.114697] ? reset_hung_task_detector+0x30/0x30 [ 718.119524] kthread+0x33f/0x460 [ 718.122870] ? kthread_park+0x180/0x180 [ 718.126827] ret_from_fork+0x24/0x30 [ 718.130657] Sending NMI from CPU 0 to CPUs 1: [ 718.135523] NMI backtrace for cpu 1 [ 718.135529] CPU: 1 PID: 4691 Comm: systemd-journal Not tainted 4.19.171-syzkaller #0 [ 718.135534] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.135537] RIP: 0010:__bpf_prog_run32+0x14/0xd0 [ 718.135547] Code: 75 0c 48 81 c4 20 01 00 00 5b 5d 41 5c c3 e8 a3 35 cb ff 0f 1f 00 48 b8 00 00 00 00 00 fc ff df 41 54 49 89 fc 55 48 89 f5 53 <48> 81 ec 00 01 00 00 48 89 e3 48 c7 04 24 b3 8a b5 41 48 c7 44 24 [ 718.135550] RSP: 0018:ffff8880a0d9fba0 EFLAGS: 00000246 [ 718.135557] RAX: dffffc0000000000 RBX: ffff8880a25b4a40 RCX: ffffffff81628dd7 [ 718.135561] RDX: 0000000000000000 RSI: ffffc900019d3038 RDI: ffff8880a0d9fe70 [ 718.135565] RBP: ffffc900019d3038 R08: 0000000000000000 R09: 0000000000000000 [ 718.135569] R10: 0000000000000007 R11: 0000000000000000 R12: ffff8880a0d9fe70 [ 718.135574] R13: 000000007fff0000 R14: 0000000000000000 R15: 000000007fff0000 [ 718.135578] FS: 00007f361b7068c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 718.135582] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 718.135586] CR2: 00007f3618adc000 CR3: 00000000a109e000 CR4: 00000000001406e0 [ 718.135590] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 718.135595] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 718.135597] Call Trace: [ 718.135601] seccomp_run_filters+0x124/0x590 [ 718.135604] ? debug_object_activate+0x12f/0x450 [ 718.135607] ? __put_seccomp_filter+0xa0/0xa0 [ 718.135610] ? __lock_acquire+0x6de/0x3ff0 [ 718.135613] __seccomp_filter+0x93/0xca0 [ 718.135616] ? seccomp_send_sigsys+0x1c0/0x1c0 [ 718.135619] ? mark_held_locks+0xf0/0xf0 [ 718.135623] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 718.135626] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 718.135629] ? debug_object_active_state+0x254/0x330 [ 718.135632] ? debug_object_init_on_stack+0x20/0x20 [ 718.135635] ? kfree+0x110/0x210 [ 718.135638] ? task_work_run+0x11c/0x1c0 [ 718.135641] __secure_computing+0xfc/0x360 [ 718.135644] syscall_trace_enter+0x563/0xd60 [ 718.135648] ? blkcg_schedule_throttle+0x1f0/0x1f0 [ 718.135651] ? syscall_slow_exit_work+0x630/0x630 [ 718.135654] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 718.135658] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 718.135661] ? trace_hardirqs_off_caller+0x6e/0x210 [ 718.135664] ? do_syscall_64+0x21/0x620 [ 718.135667] do_syscall_64+0x486/0x620 [ 718.135670] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.135673] RIP: 0033:0x7f361a9c29c7 [ 718.135682] Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 [ 718.135685] RSP: 002b:00007ffc85fe4158 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 [ 718.135693] RAX: ffffffffffffffda RBX: 00007ffc85fe7180 RCX: 00007f361a9c29c7 [ 718.135697] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00005622f4c3a9a3 [ 718.135701] RBP: 00007ffc85fe42a0 R08: 00005622f4c303e5 R09: 0000000000000018 [ 718.135705] R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 [ 718.135710] R13: 0000000000000000 R14: 00005622f5b208a0 R15: 00007ffc85fe4790 [ 718.136174] Kernel panic - not syncing: hung_task: blocked tasks [ 718.436594] CPU: 0 PID: 1567 Comm: khungtaskd Not tainted 4.19.171-syzkaller #0 [ 718.444019] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.453352] Call Trace: [ 718.455938] dump_stack+0x1fc/0x2ef [ 718.459565] panic+0x26a/0x50e [ 718.462747] ? __warn_printk+0xf3/0xf3 [ 718.466614] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 718.471700] ? cpumask_next+0x3c/0x40 [ 718.475487] ? printk_safe_flush+0xd6/0x120 [ 718.479793] ? watchdog+0x991/0xe60 [ 718.483405] ? nmi_trigger_cpumask_backtrace+0x15e/0x1f0 [ 718.488839] watchdog+0x9a2/0xe60 [ 718.492276] ? reset_hung_task_detector+0x30/0x30 [ 718.497102] kthread+0x33f/0x460 [ 718.500450] ? kthread_park+0x180/0x180 [ 718.504409] ret_from_fork+0x24/0x30 [ 718.508917] Kernel Offset: disabled [ 718.512557] Rebooting in 86400 seconds..