Warning: Permanently added '10.128.1.23' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 476.731837][ T6861] usb usb7: usbfs: process 6861 (syz-executor712) did not claim interface 0 before use [ 636.788390][ T1173] INFO: task syz-executor712:6861 blocked for more than 143 seconds. [ 636.796981][ T1173] Not tainted 5.9.0-rc2-syzkaller #0 [ 636.803088][ T1173] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 636.812292][ T1173] task:syz-executor712 state:D stack:25872 pid: 6861 ppid: 6855 flags:0x00004000 [ 636.821658][ T1173] Call Trace: [ 636.825019][ T1173] __schedule+0x8e5/0x21e0 [ 636.829545][ T1173] ? io_schedule_timeout+0x140/0x140 [ 636.834838][ T1173] schedule+0xd0/0x2a0 [ 636.839068][ T1173] schedule_timeout+0x1d8/0x250 [ 636.843918][ T1173] ? usleep_range+0x170/0x170 [ 636.848794][ T1173] ? lock_downgrade+0x830/0x830 [ 636.853643][ T1173] ? do_raw_spin_lock+0x120/0x2b0 [ 636.858743][ T1173] ? _raw_spin_unlock_irq+0x1f/0x80 [ 636.863973][ T1173] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 636.870054][ T1173] ? trace_hardirqs_on+0x5f/0x220 [ 636.875100][ T1173] wait_for_completion_timeout+0x15e/0x270 [ 636.880976][ T1173] ? wait_for_completion_io+0x260/0x260 [ 636.886629][ T1173] ? usb_submit_urb+0xb56/0x1320 [ 636.891625][ T1173] ? lockdep_init_map_waits+0x1b3/0x8a0 [ 636.897191][ T1173] usb_start_wait_urb+0x144/0x2b0 [ 636.902304][ T1173] ? usb_api_blocking_completion+0xa0/0xa0 [ 636.908178][ T1173] ? memset+0x20/0x40 [ 636.912228][ T1173] usb_bulk_msg+0x226/0x550 [ 636.916754][ T1173] do_proc_bulk+0x39b/0x710 [ 636.921402][ T1173] ? do_proc_control+0x930/0x930 [ 636.926360][ T1173] usbdev_ioctl+0x924/0x3360 [ 636.931016][ T1173] ? processcompl_compat+0x670/0x670 [ 636.936356][ T1173] ? force_sigsegv+0x1c0/0x1c0 [ 636.941966][ T1173] ? trace_hardirqs_on+0x5f/0x220 [ 636.947178][ T1173] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 636.953207][ T1173] ? do_vfs_ioctl+0x27d/0x1090 [ 636.958106][ T1173] ? generic_block_fiemap+0x60/0x60 [ 636.963475][ T1173] ? __sys_sendmsg+0x10c/0x1b0 [ 636.968299][ T1173] ? __sys_sendmsg_sock+0xb0/0xb0 [ 636.973361][ T1173] ? bpf_lsm_file_ioctl+0x5/0x10 [ 636.978377][ T1173] ? processcompl_compat+0x670/0x670 [ 636.983657][ T1173] __x64_sys_ioctl+0x193/0x200 [ 636.988522][ T1173] do_syscall_64+0x2d/0x70 [ 636.992939][ T1173] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 636.998896][ T1173] RIP: 0033:0x445929 [ 637.002823][ T1173] Code: Bad RIP value. [ 637.006864][ T1173] RSP: 002b:00007fff07425f48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 637.015310][ T1173] RAX: ffffffffffffffda RBX: 00007fff07425ff0 RCX: 0000000000445929 [ 637.023370][ T1173] RDX: 0000000020000000 RSI: 00000000c0105502 RDI: 0000000000000004 [ 637.031402][ T1173] RBP: 0000000000000000 R08: 0000000000401ec0 R09: 0000000000401ec0 [ 637.039452][ T1173] R10: 0000000000401ec0 R11: 0000000000000246 R12: 0000000000403550 [ 637.047428][ T1173] R13: 00000000004035e0 R14: 0000000000000000 R15: 0000000000000000 [ 637.055467][ T1173] [ 637.055467][ T1173] Showing all locks held in the system: [ 637.063270][ T1173] 1 lock held by khungtaskd/1173: [ 637.069128][ T1173] #0: ffffffff89bd6900 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 637.079067][ T1173] 2 locks held by in:imklog/6537: [ 637.084080][ T1173] #0: ffff88809c7b1130 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 637.094181][ T1173] #1: ffff8880ae635e18 (&rq->lock){-.-.}-{2:2}, at: fs_reclaim_acquire+0xa1/0xf0 [ 637.103571][ T1173] [ 637.105930][ T1173] ============================================= [ 637.105930][ T1173] [ 637.114386][ T1173] NMI backtrace for cpu 1 [ 637.118794][ T1173] CPU: 1 PID: 1173 Comm: khungtaskd Not tainted 5.9.0-rc2-syzkaller #0 [ 637.127010][ T1173] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.137038][ T1173] Call Trace: [ 637.140373][ T1173] dump_stack+0x18f/0x20d [ 637.144706][ T1173] nmi_cpu_backtrace.cold+0x70/0xb1 [ 637.149920][ T1173] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 637.155544][ T1173] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 637.161500][ T1173] watchdog+0xd7d/0x1000 [ 637.165720][ T1173] ? reset_hung_task_detector+0x30/0x30 [ 637.171265][ T1173] kthread+0x3b5/0x4a0 [ 637.175311][ T1173] ? __kthread_bind_mask+0xc0/0xc0 [ 637.180396][ T1173] ? __kthread_bind_mask+0xc0/0xc0 [ 637.185511][ T1173] ret_from_fork+0x1f/0x30 [ 637.190016][ T1173] Sending NMI from CPU 1 to CPUs 0: [ 637.195334][ C0] NMI backtrace for cpu 0 [ 637.195341][ C0] CPU: 0 PID: 3899 Comm: systemd-journal Not tainted 5.9.0-rc2-syzkaller #0 [ 637.195347][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.195351][ C0] RIP: 0033:0x7fb2820220e5 [ 637.195362][ C0] Code: b1 00 00 00 4d 85 c9 0f 84 c8 00 00 00 4d 85 c0 0f 84 df 00 00 00 49 8d 2c 08 48 3b 6f 60 48 89 fb 77 42 8d 7e ff 48 8d 43 30 <83> ff 07 bf 00 00 00 00 0f 43 f7 48 83 ec 08 48 8b bb 48 01 00 00 [ 637.195367][ C0] RSP: 002b:00007ffc500e6ee0 EFLAGS: 00000287 [ 637.195375][ C0] RAX: 0000555a52bb5eb0 RBX: 0000555a52bb5e80 RCX: 000000000011b0f0 [ 637.195381][ C0] RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000005 [ 637.195392][ C0] RBP: 000000000011b148 R08: 0000000000000058 R09: 00007ffc500e6f20 [ 637.195398][ C0] R10: 000000000001300a R11: 00007fb27f6d2d10 R12: 0000000000000001 [ 637.195403][ C0] R13: 00007ffc500e6f98 R14: 0000000000000006 R15: 00007ffc500e6f20 [ 637.195407][ C0] FS: 00007fb2823338c0 GS: 0000000000000000 [ 637.196231][ T1173] Kernel panic - not syncing: hung_task: blocked tasks [ 637.300968][ T1173] CPU: 1 PID: 1173 Comm: khungtaskd Not tainted 5.9.0-rc2-syzkaller #0 [ 637.309175][ T1173] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.319201][ T1173] Call Trace: [ 637.322469][ T1173] dump_stack+0x18f/0x20d [ 637.326823][ T1173] panic+0x2e3/0x75c [ 637.330698][ T1173] ? __warn_printk+0xf3/0xf3 [ 637.335262][ T1173] ? cpumask_next+0x3c/0x40 [ 637.339780][ T1173] ? printk_safe_flush+0xd6/0x120 [ 637.344784][ T1173] ? watchdog.cold+0x5/0x16b [ 637.349348][ T1173] ? watchdog+0xa82/0x1000 [ 637.353737][ T1173] watchdog.cold+0x16/0x16b [ 637.358216][ T1173] ? reset_hung_task_detector+0x30/0x30 [ 637.363732][ T1173] kthread+0x3b5/0x4a0 [ 637.367774][ T1173] ? __kthread_bind_mask+0xc0/0xc0 [ 637.372857][ T1173] ? __kthread_bind_mask+0xc0/0xc0 [ 637.377949][ T1173] ret_from_fork+0x1f/0x30 [ 637.383656][ T1173] Kernel Offset: disabled [ 637.387973][ T1173] Rebooting in 86400 seconds..