[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.3' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 486.633815][ T1292] Bluetooth: hci0: command 0x0409 tx timeout [ 488.713582][ T1292] Bluetooth: hci0: command 0x041b tx timeout [ 490.793443][ T6607] Bluetooth: hci0: command 0x040f tx timeout [ 492.873166][ T6607] Bluetooth: hci0: command 0x0419 tx timeout [ 494.952970][ T6607] Bluetooth: hci0: command 0x0405 tx timeout [ 610.703071][ T6607] Bluetooth: hci0: command 0x0406 tx timeout [ 716.136817][ T27] INFO: task krfcommd:2893 blocked for more than 143 seconds. [ 716.144282][ T27] Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 [ 716.152131][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.160935][ T27] task:krfcommd state:D stack:28672 pid: 2893 ppid: 2 flags:0x00004000 [ 716.170424][ T27] Call Trace: [ 716.173711][ T27] __schedule+0x93a/0x26f0 [ 716.178501][ T27] ? io_schedule_timeout+0x140/0x140 [ 716.183836][ T27] ? rwlock_bug.part.0+0x90/0x90 [ 716.189488][ T27] schedule+0xd3/0x270 [ 716.193618][ T27] schedule_preempt_disabled+0xf/0x20 [ 716.199360][ T27] __mutex_lock+0xa46/0x1300 [ 716.203974][ T27] ? rfcomm_run+0x2ed/0x4a20 [ 716.208930][ T27] ? mutex_lock_io_nested+0x1160/0x1160 [ 716.214491][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 716.219708][ T27] rfcomm_run+0x2ed/0x4a20 [ 716.224139][ T27] ? find_held_lock+0x2d/0x110 [ 716.229261][ T27] ? rfcomm_check_accept+0x240/0x240 [ 716.234570][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 716.239660][ T27] ? __init_waitqueue_head+0xd0/0xd0 [ 716.245016][ T27] ? _raw_spin_unlock_irqrestore+0x50/0x70 [ 716.251142][ T27] ? lockdep_hardirqs_on+0x79/0x100 [ 716.256357][ T27] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 716.262954][ T27] ? __kthread_parkme+0x15f/0x220 [ 716.268146][ T27] ? rfcomm_check_accept+0x240/0x240 [ 716.273448][ T27] kthread+0x3e5/0x4d0 [ 716.277832][ T27] ? set_kthread_struct+0x130/0x130 [ 716.283045][ T27] ret_from_fork+0x1f/0x30 [ 716.287796][ T27] INFO: task syz-executor110:6605 blocked for more than 143 seconds. [ 716.295865][ T27] Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 [ 716.303239][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.312049][ T27] task:syz-executor110 state:D stack:27704 pid: 6605 ppid: 6573 flags:0x00004006 [ 716.321431][ T27] Call Trace: [ 716.324720][ T27] __schedule+0x93a/0x26f0 [ 716.329313][ T27] ? io_schedule_timeout+0x140/0x140 [ 716.334608][ T27] ? trace_hardirqs_on+0x5b/0x1c0 [ 716.339708][ T27] ? _raw_spin_unlock_irqrestore+0x3d/0x70 [ 716.345519][ T27] schedule+0xd3/0x270 [ 716.349628][ T27] __lock_sock+0x13d/0x260 [ 716.354242][ T27] ? sock_omalloc+0x180/0x180 [ 716.358980][ T27] ? __rfcomm_dlc_close+0x162/0x8a0 [ 716.364238][ T27] ? finish_wait+0x270/0x270 [ 716.368857][ T27] ? rwlock_bug.part.0+0x90/0x90 [ 716.373805][ T27] lock_sock_nested+0xf6/0x120 [ 716.378989][ T27] rfcomm_sk_state_change+0xb4/0x390 [ 716.384293][ T27] __rfcomm_dlc_close+0x1b6/0x8a0 [ 716.389362][ T27] rfcomm_dlc_close+0x1ea/0x240 [ 716.394222][ T27] __rfcomm_sock_close+0xac/0x260 [ 716.399275][ T27] rfcomm_sock_shutdown+0xe9/0x210 [ 716.404394][ T27] rfcomm_sock_release+0x5f/0x140 [ 716.409493][ T27] __sock_release+0xcd/0x280 [ 716.414268][ T27] sock_close+0x18/0x20 [ 716.418450][ T27] __fput+0x288/0x9f0 [ 716.422578][ T27] ? __sock_release+0x280/0x280 [ 716.427463][ T27] task_work_run+0xdd/0x1a0 [ 716.431967][ T27] do_exit+0xbae/0x2a30 [ 716.436163][ T27] ? lock_acquire+0x442/0x510 [ 716.440862][ T27] ? rcu_read_lock_sched_held+0xd/0x70 [ 716.446380][ T27] ? lock_release+0x522/0x720 [ 716.451173][ T27] ? mm_update_next_owner+0x7a0/0x7a0 [ 716.456682][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 716.461544][ T27] ? do_raw_spin_lock+0x120/0x2b0 [ 716.466557][ T27] ? rwlock_bug.part.0+0x90/0x90 [ 716.471658][ T27] do_group_exit+0x125/0x310 [ 716.476345][ T27] get_signal+0x47f/0x2160 [ 716.480829][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 716.485700][ T27] ? wake_up_q+0xf0/0xf0 [ 716.490149][ T27] arch_do_signal_or_restart+0x2a9/0x1c40 [ 716.495924][ T27] ? rfcomm_sock_connect+0x15f/0x460 [ 716.501337][ T27] ? rfcomm_sock_getname+0x300/0x300 [ 716.506910][ T27] ? __sys_connect_file+0x4e/0x1a0 [ 716.512024][ T27] ? get_sigframe_size+0x10/0x10 [ 716.516979][ T27] ? __sys_connect_file+0x1a0/0x1a0 [ 716.522278][ T27] exit_to_user_mode_prepare+0x17d/0x290 [ 716.528002][ T27] syscall_exit_to_user_mode+0x19/0x60 [ 716.533463][ T27] do_syscall_64+0x42/0xb0 [ 716.537984][ T27] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 716.543939][ T27] RIP: 0033:0x445fe9 [ 716.547886][ T27] RSP: 002b:00007ffe45e05de8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 716.556297][ T27] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000445fe9 [ 716.564317][ T27] RDX: 0000000000000080 RSI: 0000000020000000 RDI: 0000000000000004 [ 716.572411][ T27] RBP: 0000000000000003 R08: 000000ff00000001 R09: 000000ff00000001 [ 716.580477][ T27] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000010722b8 [ 716.588588][ T27] R13: 0000000000000072 R14: 00007ffe45e05e40 R15: 0000000000000003 [ 716.596606][ T27] INFO: lockdep is turned off. [ 716.601360][ T27] NMI backtrace for cpu 0 [ 716.605668][ T27] CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 [ 716.615016][ T27] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.625064][ T27] Call Trace: [ 716.628334][ T27] dump_stack_lvl+0xcd/0x134 [ 716.632951][ T27] nmi_cpu_backtrace.cold+0x47/0x144 [ 716.638233][ T27] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.643920][ T27] nmi_trigger_cpumask_backtrace+0x1ae/0x220 [ 716.649934][ T27] watchdog+0xcb7/0xed0 [ 716.654089][ T27] ? trace_sched_process_hang+0x280/0x280 [ 716.659818][ T27] kthread+0x3e5/0x4d0 [ 716.663884][ T27] ? set_kthread_struct+0x130/0x130 [ 716.669081][ T27] ret_from_fork+0x1f/0x30 [ 716.673586][ T27] Sending NMI from CPU 0 to CPUs 1: [ 716.678831][ C1] NMI backtrace for cpu 1 [ 716.678841][ C1] CPU: 1 PID: 159 Comm: kworker/u4:3 Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 [ 716.678866][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.678880][ C1] Workqueue: events_unbound toggle_allocation_gate [ 716.678971][ C1] RIP: 0010:insn_get_sib+0x0/0x330 [ 716.679028][ C1] Code: c6 fd e9 da fe ff ff e8 3e 3c c6 fd e9 16 ff ff ff e8 34 3c c6 fd e9 52 ff ff ff e8 2a 3c c6 fd eb 99 0f 1f 84 00 00 00 00 00 <41> 54 55 53 48 89 fb e8 94 86 80 fd 48 8d 7b 2c 48 b8 00 00 00 00 [ 716.679048][ C1] RSP: 0018:ffffc90001c6f9d8 EFLAGS: 00000293 [ 716.679064][ C1] RAX: 0000000000000000 RBX: ffffc90001c6fa68 RCX: 0000000000000000 [ 716.679079][ C1] RDX: ffff8880174e9c80 RSI: ffffffff83f55104 RDI: ffffc90001c6fa68 [ 716.679094][ C1] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [ 716.679107][ C1] R10: ffffffff83f54e7f R11: 0000000000000000 R12: 0000000000000000 [ 716.679121][ C1] R13: ffffffff81bb13f8 R14: 0000000000000000 R15: 0000000000000000 [ 716.679135][ C1] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 716.679156][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 716.679171][ C1] CR2: 00007faa64b06008 CR3: 000000000b68e000 CR4: 00000000001506e0 [ 716.679185][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 716.679198][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 716.679211][ C1] Call Trace: [ 716.679217][ C1] insn_get_displacement+0x31c/0x660 [ 716.679246][ C1] ? kmem_cache_alloc_bulk+0x179/0x710 [ 716.679299][ C1] ? kmem_cache_alloc_bulk+0x188/0x710 [ 716.679326][ C1] insn_decode+0x473/0x4e0 [ 716.679351][ C1] ? kmem_cache_alloc_bulk+0x179/0x710 [ 716.679377][ C1] arch_jump_entry_size+0xa0/0x110 [ 716.679424][ C1] ? arch_jump_entry_size.part.0+0x10/0x10 [ 716.679448][ C1] ? rcu_read_lock_sched_held+0xd/0x70 [ 716.679481][ C1] ? kmem_cache_alloc_bulk+0x179/0x710 [ 716.679508][ C1] ? kmem_cache_alloc_bulk+0x188/0x710 [ 716.679533][ C1] ? kmem_cache_alloc_bulk+0x179/0x710 [ 716.679562][ C1] ? static_key_disable_cpuslocked+0x108/0x1b0 [ 716.679606][ C1] ? kmem_cache_alloc_bulk+0x3eb/0x710 [ 716.679632][ C1] __jump_label_patch+0x7c/0x1b0 [ 716.679656][ C1] arch_jump_label_transform_queue+0x63/0x100 [ 716.679680][ C1] ? lock_release+0x522/0x720 [ 716.679703][ C1] __jump_label_update+0x12e/0x400 [ 716.679728][ C1] jump_label_update+0x1d5/0x430 [ 716.679752][ C1] static_key_disable_cpuslocked+0x152/0x1b0 [ 716.679777][ C1] static_key_disable+0x16/0x20 [ 716.679799][ C1] toggle_allocation_gate+0x185/0x390 [ 716.679824][ C1] ? lock_release+0x720/0x720 [ 716.679845][ C1] ? wake_up_kfence_timer+0x20/0x20 [ 716.679871][ C1] ? read_word_at_a_time+0xe/0x20 [ 716.679892][ C1] ? strscpy+0xa1/0x2b0 [ 716.679912][ C1] process_one_work+0x98d/0x1630 [ 716.679946][ C1] ? pwq_dec_nr_in_flight+0x320/0x320 [ 716.679976][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 716.680003][ C1] worker_thread+0x658/0x11f0 [ 716.680035][ C1] ? process_one_work+0x1630/0x1630 [ 716.680063][ C1] kthread+0x3e5/0x4d0 [ 716.680087][ C1] ? set_kthread_struct+0x130/0x130 [ 716.680115][ C1] ret_from_fork+0x1f/0x30 [ 716.680146][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.315 msecs [ 716.680853][ T27] Kernel panic - not syncing: hung_task: blocked tasks [ 717.010094][ T27] CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 [ 717.019470][ T27] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 717.029512][ T27] Call Trace: [ 717.032780][ T27] dump_stack_lvl+0xcd/0x134 [ 717.037367][ T27] panic+0x2b0/0x6dd [ 717.041277][ T27] ? __warn_printk+0xf3/0xf3 [ 717.045861][ T27] ? lapic_can_unplug_cpu+0x80/0x80 [ 717.051080][ T27] ? preempt_schedule_thunk+0x16/0x18 [ 717.056448][ T27] ? nmi_trigger_cpumask_backtrace+0x191/0x220 [ 717.062603][ T27] ? watchdog.cold+0x1b9/0x1de [ 717.067386][ T27] watchdog.cold+0x1ca/0x1de [ 717.071973][ T27] ? trace_sched_process_hang+0x280/0x280 [ 717.077776][ T27] kthread+0x3e5/0x4d0 [ 717.081841][ T27] ? set_kthread_struct+0x130/0x130 [ 717.087033][ T27] ret_from_fork+0x1f/0x30 [ 717.091504][ T27] Kernel Offset: disabled [ 717.095899][ T27] Rebooting in 86400 seconds..