Warning: Permanently added '10.128.1.112' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 485.996237][ T1067] Bluetooth: hci0: command 0x0409 tx timeout [ 488.075958][ T1067] Bluetooth: hci0: command 0x041b tx timeout [ 490.155664][ T6620] Bluetooth: hci0: command 0x040f tx timeout [ 492.235309][ T6620] Bluetooth: hci0: command 0x0419 tx timeout [ 494.314957][ T6620] Bluetooth: hci0: command 0x0405 tx timeout [ 610.620972][ T6620] Bluetooth: hci0: command 0x0406 tx timeout [ 716.052144][ T26] INFO: task krfcommd:2893 blocked for more than 143 seconds. [ 716.059646][ T26] Not tainted 5.14.0-rc6-next-20210817-syzkaller #0 [ 716.067806][ T26] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.076798][ T26] task:krfcommd state:D stack:29640 pid: 2893 ppid: 2 flags:0x00004000 [ 716.086048][ T26] Call Trace: [ 716.089325][ T26] __schedule+0x93a/0x26f0 [ 716.093835][ T26] ? io_schedule_timeout+0x140/0x140 [ 716.099126][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 716.104135][ T26] schedule+0xd3/0x270 [ 716.108208][ T26] schedule_preempt_disabled+0xf/0x20 [ 716.113610][ T26] __mutex_lock+0xa46/0x1300 [ 716.118206][ T26] ? rfcomm_run+0x2ed/0x4a20 [ 716.122855][ T26] ? mutex_lock_io_nested+0x1160/0x1160 [ 716.128458][ T26] ? lock_downgrade+0x6e0/0x6e0 [ 716.133348][ T26] rfcomm_run+0x2ed/0x4a20 [ 716.137768][ T26] ? find_held_lock+0x2d/0x110 [ 716.142551][ T26] ? rfcomm_check_accept+0x240/0x240 [ 716.147956][ T26] ? lock_downgrade+0x6e0/0x6e0 [ 716.152847][ T26] ? __init_waitqueue_head+0xd0/0xd0 [ 716.158185][ T26] ? _raw_spin_unlock_irqrestore+0x50/0x70 [ 716.164295][ T26] ? lockdep_hardirqs_on+0x79/0x100 [ 716.169498][ T26] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 716.175830][ T26] ? __kthread_parkme+0x15f/0x220 [ 716.180918][ T26] ? rfcomm_check_accept+0x240/0x240 [ 716.186237][ T26] kthread+0x3e5/0x4d0 [ 716.190348][ T26] ? set_kthread_struct+0x130/0x130 [ 716.195600][ T26] ret_from_fork+0x1f/0x30 [ 716.200106][ T26] INFO: task syz-executor699:6618 blocked for more than 143 seconds. [ 716.208201][ T26] Not tainted 5.14.0-rc6-next-20210817-syzkaller #0 [ 716.215343][ T26] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.224024][ T26] task:syz-executor699 state:D stack:28184 pid: 6618 ppid: 6586 flags:0x00004006 [ 716.233264][ T26] Call Trace: [ 716.236538][ T26] __schedule+0x93a/0x26f0 [ 716.240944][ T26] ? io_schedule_timeout+0x140/0x140 [ 716.246251][ T26] ? trace_hardirqs_on+0x5b/0x1c0 [ 716.251335][ T26] ? _raw_spin_unlock_irqrestore+0x3d/0x70 [ 716.257170][ T26] schedule+0xd3/0x270 [ 716.261281][ T26] __lock_sock+0x13d/0x260 [ 716.265779][ T26] ? sock_omalloc+0x180/0x180 [ 716.270475][ T26] ? __rfcomm_dlc_close+0x162/0x8a0 [ 716.275976][ T26] ? finish_wait+0x270/0x270 [ 716.280573][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 716.285682][ T26] lock_sock_nested+0xf6/0x120 [ 716.290449][ T26] rfcomm_sk_state_change+0xb4/0x390 [ 716.295762][ T26] __rfcomm_dlc_close+0x1b6/0x8a0 [ 716.300788][ T26] rfcomm_dlc_close+0x1ea/0x240 [ 716.305652][ T26] __rfcomm_sock_close+0xac/0x260 [ 716.310681][ T26] rfcomm_sock_shutdown+0xe9/0x210 [ 716.315831][ T26] rfcomm_sock_release+0x5f/0x140 [ 716.320858][ T26] __sock_release+0xcd/0x280 [ 716.325544][ T26] sock_close+0x18/0x20 [ 716.329707][ T26] __fput+0x288/0x9f0 [ 716.333758][ T26] ? __sock_release+0x280/0x280 [ 716.338627][ T26] task_work_run+0xdd/0x1a0 [ 716.343151][ T26] do_exit+0xbae/0x2a30 [ 716.347369][ T26] ? lock_acquire+0x442/0x510 [ 716.352074][ T26] ? rcu_read_lock_sched_held+0xd/0x70 [ 716.357588][ T26] ? lock_release+0x522/0x720 [ 716.362329][ T26] ? mm_update_next_owner+0x7a0/0x7a0 [ 716.367725][ T26] ? lock_downgrade+0x6e0/0x6e0 [ 716.372607][ T26] ? do_raw_spin_lock+0x120/0x2b0 [ 716.377632][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 716.382585][ T26] do_group_exit+0x125/0x310 [ 716.387175][ T26] get_signal+0x47f/0x2160 [ 716.391622][ T26] ? lock_downgrade+0x6e0/0x6e0 [ 716.396501][ T26] ? wake_up_q+0xf0/0xf0 [ 716.400782][ T26] arch_do_signal_or_restart+0x2a9/0x1c40 [ 716.406546][ T26] ? rfcomm_sock_connect+0x15f/0x460 [ 716.411830][ T26] ? rfcomm_sock_getname+0x300/0x300 [ 716.417137][ T26] ? __sys_connect_file+0x4e/0x1a0 [ 716.422282][ T26] ? get_sigframe_size+0x10/0x10 [ 716.427216][ T26] ? __sys_connect_file+0x1a0/0x1a0 [ 716.432444][ T26] exit_to_user_mode_prepare+0x17d/0x290 [ 716.438114][ T26] syscall_exit_to_user_mode+0x19/0x60 [ 716.443601][ T26] do_syscall_64+0x42/0xb0 [ 716.448062][ T26] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 716.454011][ T26] RIP: 0033:0x445fe9 [ 716.457903][ T26] RSP: 002b:00007ffed84aa608 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 716.466365][ T26] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000445fe9 [ 716.474374][ T26] RDX: 0000000000000080 RSI: 0000000020000000 RDI: 0000000000000004 [ 716.482373][ T26] RBP: 0000000000000003 R08: 000000ff00000001 R09: 000000ff00000001 [ 716.490341][ T26] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000007bc2b8 [ 716.498476][ T26] R13: 0000000000000072 R14: 00007ffed84aa660 R15: 0000000000000003 [ 716.506490][ T26] INFO: lockdep is turned off. [ 716.511235][ T26] NMI backtrace for cpu 1 [ 716.515556][ T26] CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.14.0-rc6-next-20210817-syzkaller #0 [ 716.524900][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.534930][ T26] Call Trace: [ 716.538195][ T26] dump_stack_lvl+0xcd/0x134 [ 716.542808][ T26] nmi_cpu_backtrace.cold+0x47/0x144 [ 716.548073][ T26] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.553285][ T26] nmi_trigger_cpumask_backtrace+0x1ae/0x220 [ 716.559275][ T26] watchdog+0xcb7/0xed0 [ 716.563414][ T26] ? trace_sched_process_hang+0x280/0x280 [ 716.569113][ T26] kthread+0x3e5/0x4d0 [ 716.573161][ T26] ? set_kthread_struct+0x130/0x130 [ 716.578354][ T26] ret_from_fork+0x1f/0x30 [ 716.582832][ T26] Sending NMI from CPU 1 to CPUs 0: [ 716.588046][ C0] NMI backtrace for cpu 0 skipped: idling at acpi_idle_do_entry+0x1c6/0x250 [ 716.589030][ T26] Kernel panic - not syncing: hung_task: blocked tasks [ 716.604513][ T26] CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.14.0-rc6-next-20210817-syzkaller #0 [ 716.613869][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.623907][ T26] Call Trace: [ 716.627174][ T26] dump_stack_lvl+0xcd/0x134 [ 716.631759][ T26] panic+0x2b0/0x6dd [ 716.635663][ T26] ? __warn_printk+0xf3/0xf3 [ 716.640249][ T26] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.645457][ T26] ? preempt_schedule_thunk+0x16/0x18 [ 716.650824][ T26] ? nmi_trigger_cpumask_backtrace+0x191/0x220 [ 716.656973][ T26] ? watchdog.cold+0x1b9/0x1de [ 716.661742][ T26] watchdog.cold+0x1ca/0x1de [ 716.666328][ T26] ? trace_sched_process_hang+0x280/0x280 [ 716.672044][ T26] kthread+0x3e5/0x4d0 [ 716.676106][ T26] ? set_kthread_struct+0x130/0x130 [ 716.681297][ T26] ret_from_fork+0x1f/0x30 [ 716.686943][ T26] Kernel Offset: disabled [ 716.691248][ T26] Rebooting in 86400 seconds..