Warning: Permanently added '10.128.0.72' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 1001.328302] INFO: task syz-executor818:7961 blocked for more than 140 seconds. [ 1001.335782] Not tainted 4.14.218-syzkaller #0 [ 1001.340974] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1001.348984] syz-executor818 D27848 7961 7960 0x00000004 [ 1001.354596] Call Trace: [ 1001.357181] __schedule+0x88b/0x1de0 [ 1001.360919] ? io_schedule_timeout+0x140/0x140 [ 1001.365492] ? trace_hardirqs_on+0x10/0x10 [ 1001.369780] schedule+0x8d/0x1b0 [ 1001.373140] schedule_timeout+0x80a/0xe90 [ 1001.377369] ? trace_hardirqs_on_caller+0x3a8/0x580 [ 1001.382436] ? usleep_range+0x130/0x130 [ 1001.386405] ? wait_for_common+0x26a/0x430 [ 1001.390675] ? lock_acquire+0x170/0x3f0 [ 1001.394636] ? lock_downgrade+0x740/0x740 [ 1001.398840] ? _raw_spin_unlock_irq+0x24/0x80 [ 1001.403324] wait_for_common+0x272/0x430 [ 1001.407382] ? out_of_line_wait_on_atomic_t+0x1a0/0x1a0 [ 1001.412779] ? wake_up_q+0xd0/0xd0 [ 1001.416386] usb_start_wait_urb+0x125/0x440 [ 1001.420759] ? usb_api_blocking_completion+0xa0/0xa0 [ 1001.425855] ? __kmalloc+0x3a4/0x400 [ 1001.429600] ? usb_alloc_urb+0x1f/0x130 [ 1001.433577] ? memset+0x20/0x40 [ 1001.436835] usb_bulk_msg+0x1f6/0x500 [ 1001.440659] proc_bulk+0x331/0x6d0 [ 1001.444189] ? proc_control+0x670/0x670 [ 1001.448198] ? timespec_trunc+0xb7/0x120 [ 1001.452244] ? put_timespec64+0xf0/0xf0 [ 1001.456198] ? current_kernel_time64+0x154/0x230 [ 1001.460985] ? __lock_acquire+0x5fc/0x3f20 [ 1001.465213] usbdev_do_ioctl+0x5b0/0x2b70 [ 1001.469405] ? proc_bulk+0x6d0/0x6d0 [ 1001.473111] ? trace_hardirqs_on+0x10/0x10 [ 1001.477325] ? check_preemption_disabled+0x35/0x240 [ 1001.482364] ? __switch_to_xtra+0x93/0x12f0 [ 1001.486677] ? finish_task_switch+0x178/0x610 [ 1001.491209] ? lock_downgrade+0x740/0x740 [ 1001.495343] ? _raw_spin_unlock_irq+0x24/0x80 [ 1001.499857] ? usbdev_compat_ioctl+0x30/0x30 [ 1001.504257] usbdev_ioctl+0x21/0x30 [ 1001.507857] do_vfs_ioctl+0x75a/0xff0 [ 1001.511684] ? ioctl_preallocate+0x1a0/0x1a0 [ 1001.516099] ? io_schedule_timeout+0x140/0x140 [ 1001.520704] ? security_file_ioctl+0x83/0xb0 [ 1001.525106] SyS_ioctl+0x7f/0xb0 [ 1001.528503] ? do_vfs_ioctl+0xff0/0xff0 [ 1001.532466] do_syscall_64+0x1d5/0x640 [ 1001.536332] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1001.541539] RIP: 0033:0x444209 [ 1001.544714] RSP: 002b:00007ffefeb3d318 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 1001.552450] RAX: ffffffffffffffda RBX: 00000000004004a0 RCX: 0000000000444209 [ 1001.559744] RDX: 00000000200002c0 RSI: 00000000c0185502 RDI: 0000000000000003 [ 1001.566999] RBP: 0000000000000000 R08: 00007ffefeb3d4b8 R09: 00007ffefeb3d4b8 [ 1001.574405] R10: 00007ffefeb3cd90 R11: 0000000000000246 R12: 0000000000403520 [ 1001.581703] R13: 431bde82d7b634db R14: 00000000004b2018 R15: 00000000004004a0 [ 1001.589066] [ 1001.589066] Showing all locks held in the system: [ 1001.595377] 1 lock held by khungtaskd/1533: [ 1001.599765] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a [ 1001.608870] 1 lock held by in:imklog/7668: [ 1001.613083] #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0x1fb/0x2b0 [ 1001.621517] [ 1001.623126] ============================================= [ 1001.623126] [ 1001.630172] NMI backtrace for cpu 0 [ 1001.633784] CPU: 0 PID: 1533 Comm: khungtaskd Not tainted 4.14.218-syzkaller #0 [ 1001.641204] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1001.650529] Call Trace: [ 1001.653094] dump_stack+0x1b2/0x281 [ 1001.656694] nmi_cpu_backtrace.cold+0x57/0x93 [ 1001.661165] ? irq_force_complete_move+0x350/0x350 [ 1001.666099] nmi_trigger_cpumask_backtrace+0x13a/0x180 [ 1001.671350] watchdog+0x5b9/0xb40 [ 1001.674781] ? hungtask_pm_notify+0x50/0x50 [ 1001.679078] kthread+0x30d/0x420 [ 1001.682418] ? kthread_create_on_node+0xd0/0xd0 [ 1001.687075] ret_from_fork+0x24/0x30 [ 1001.690849] Sending NMI from CPU 0 to CPUs 1: [ 1001.695759] NMI backtrace for cpu 1 [ 1001.695763] CPU: 1 PID: 4615 Comm: systemd-journal Not tainted 4.14.218-syzkaller #0 [ 1001.695767] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1001.695769] task: ffff8880a1b06600 task.stack: ffff8880a1b08000 [ 1001.695772] RIP: 0010:___bpf_prog_run+0x2f49/0x5a70 [ 1001.695774] RSP: 0018:ffff8880a1b0fa48 EFLAGS: 00000246 [ 1001.695779] RAX: 0000000000000080 RBX: dffffc0000000000 RCX: ffff8880a1b0fe68 [ 1001.695782] RDX: 1ffff11014361f6b RSI: ffffc900019c7030 RDI: ffffc900019c7059 [ 1001.695785] RBP: ffff8880a1b0fb58 R08: 0000000000000000 R09: 0000000000000000 [ 1001.695787] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff878eff60 [ 1001.695790] R13: 1ffff11014361f50 R14: ffffc900019c7058 R15: ffff8880a1b0fb58 [ 1001.695794] FS: 00007fa2e86528c0(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 1001.695796] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1001.695799] CR2: 00007fa2e5a23000 CR3: 00000000a1f82000 CR4: 00000000001406e0 [ 1001.695802] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1001.695805] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1001.695807] Call Trace: [ 1001.695809] ? bpf_jit_compile+0x30/0x30 [ 1001.695811] ? __bpf_prog_run32+0x7c/0xa0 [ 1001.695813] ? __bpf_prog_run64+0xb0/0xb0 [ 1001.695815] ? lock_downgrade+0x740/0x740 [ 1001.695817] ? __mutex_unlock_slowpath+0x75/0x770 [ 1001.695819] ? seccomp_run_filters+0xfb/0x540 [ 1001.695821] ? devkmsg_read+0x5f6/0x9b0 [ 1001.695823] ? __put_seccomp_filter+0x90/0x90 [ 1001.695826] ? __add_preferred_console.constprop.0+0x160/0x160 [ 1001.695828] ? aa_path_link+0x3a0/0x3a0 [ 1001.695830] ? fsnotify+0x974/0x11b0 [ 1001.695832] ? __seccomp_filter+0x7e/0xd60 [ 1001.695834] ? seccomp_send_sigsys+0x180/0x180 [ 1001.695836] ? fsnotify+0x974/0x11b0 [ 1001.695838] ? __fsnotify_inode_delete+0x20/0x20 [ 1001.695841] ? __fsnotify_update_child_dentry_flags.part.0+0x2e0/0x2e0 [ 1001.695843] ? __secure_computing+0xdd/0x3e0 [ 1001.695845] ? syscall_trace_enter+0x359/0xc20 [ 1001.695847] ? syscall_slow_exit_work+0x560/0x560 [ 1001.695849] ? do_syscall_64+0x4c/0x640 [ 1001.695851] ? do_syscall_64+0x41b/0x640 [ 1001.695854] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1001.695855] Code: 0f b6 04 18 38 d0 7f 08 84 c0 0f 85 47 18 00 00 41 0f b6 46 01 48 89 c2 83 e2 0f 4c 8d 7c d5 00 4c 89 fa 48 c1 ea 03 80 3c 1a 00 <0f> 85 a6 1d 00 00 c0 e8 04 49 8b 17 0f b6 c0 4c 8d 7c c5 00 4c [ 1001.696350] Kernel panic - not syncing: hung_task: blocked tasks [ 1001.931855] CPU: 0 PID: 1533 Comm: khungtaskd Not tainted 4.14.218-syzkaller #0 [ 1001.939276] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1001.948615] Call Trace: [ 1001.951184] dump_stack+0x1b2/0x281 [ 1001.954800] panic+0x1f9/0x42d [ 1001.957986] ? add_taint.cold+0x16/0x16 [ 1001.961951] ? printk_safe_flush+0xa9/0x110 [ 1001.966271] watchdog+0x5ca/0xb40 [ 1001.969701] ? hungtask_pm_notify+0x50/0x50 [ 1001.973998] kthread+0x30d/0x420 [ 1001.977336] ? kthread_create_on_node+0xd0/0xd0 [ 1001.981988] ret_from_fork+0x24/0x30 [ 1001.986380] Kernel Offset: disabled [ 1001.990008] Rebooting in 86400 seconds..