[ 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. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.85' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 486.675417][ T1291] Bluetooth: hci0: command 0x0409 tx timeout [ 488.755085][ T1291] Bluetooth: hci0: command 0x041b tx timeout [ 490.834819][ T1291] Bluetooth: hci0: command 0x040f tx timeout [ 492.914527][ T1291] Bluetooth: hci0: command 0x0419 tx timeout [ 494.994213][ T1291] Bluetooth: hci0: command 0x0405 tx timeout [ 610.661023][ T1291] Bluetooth: hci0: command 0x0406 tx timeout [ 716.092594][ T27] INFO: task krfcommd:2892 blocked for more than 143 seconds. [ 716.100083][ T27] Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 [ 716.108155][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.116956][ T27] task:krfcommd state:D stack:29640 pid: 2892 ppid: 2 flags:0x00004000 [ 716.126245][ T27] Call Trace: [ 716.129522][ T27] __schedule+0x93a/0x26f0 [ 716.134341][ T27] ? io_schedule_timeout+0x140/0x140 [ 716.139646][ T27] ? rwlock_bug.part.0+0x90/0x90 [ 716.144879][ T27] schedule+0xd3/0x270 [ 716.148962][ T27] schedule_preempt_disabled+0xf/0x20 [ 716.154593][ T27] __mutex_lock+0xa46/0x1300 [ 716.159220][ T27] ? rfcomm_run+0x2ed/0x4a20 [ 716.164113][ T27] ? mutex_lock_io_nested+0x1160/0x1160 [ 716.169968][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 716.175194][ T27] rfcomm_run+0x2ed/0x4a20 [ 716.179634][ T27] ? find_held_lock+0x2d/0x110 [ 716.184697][ T27] ? rfcomm_check_accept+0x240/0x240 [ 716.190014][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 716.195206][ T27] ? __init_waitqueue_head+0xd0/0xd0 [ 716.200559][ T27] ? _raw_spin_unlock_irqrestore+0x50/0x70 [ 716.206653][ T27] ? lockdep_hardirqs_on+0x79/0x100 [ 716.211865][ T27] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 716.218415][ T27] ? __kthread_parkme+0x15f/0x220 [ 716.223581][ T27] ? rfcomm_check_accept+0x240/0x240 [ 716.228886][ T27] kthread+0x3e5/0x4d0 [ 716.233175][ T27] ? set_kthread_struct+0x130/0x130 [ 716.238403][ T27] ret_from_fork+0x1f/0x30 [ 716.243241][ T27] INFO: task syz-executor119:6599 blocked for more than 143 seconds. [ 716.251306][ T27] Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 [ 716.258617][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.267339][ T27] task:syz-executor119 state:D stack:28184 pid: 6599 ppid: 6566 flags:0x00004006 [ 716.276641][ T27] Call Trace: [ 716.279919][ T27] __schedule+0x93a/0x26f0 [ 716.284593][ T27] ? io_schedule_timeout+0x140/0x140 [ 716.289892][ T27] ? trace_hardirqs_on+0x5b/0x1c0 [ 716.295326][ T27] ? _raw_spin_unlock_irqrestore+0x3d/0x70 [ 716.301146][ T27] schedule+0xd3/0x270 [ 716.305462][ T27] __lock_sock+0x13d/0x260 [ 716.309957][ T27] ? sock_omalloc+0x180/0x180 [ 716.314897][ T27] ? __rfcomm_dlc_close+0x162/0x8a0 [ 716.320163][ T27] ? finish_wait+0x270/0x270 [ 716.325022][ T27] ? rwlock_bug.part.0+0x90/0x90 [ 716.329991][ T27] lock_sock_nested+0xf6/0x120 [ 716.335349][ T27] rfcomm_sk_state_change+0xb4/0x390 [ 716.340667][ T27] __rfcomm_dlc_close+0x1b6/0x8a0 [ 716.346054][ T27] rfcomm_dlc_close+0x1ea/0x240 [ 716.350941][ T27] __rfcomm_sock_close+0xac/0x260 [ 716.356292][ T27] rfcomm_sock_shutdown+0xe9/0x210 [ 716.361680][ T27] rfcomm_sock_release+0x5f/0x140 [ 716.366958][ T27] __sock_release+0xcd/0x280 [ 716.371652][ T27] sock_close+0x18/0x20 [ 716.376049][ T27] __fput+0x288/0x9f0 [ 716.380145][ T27] ? __sock_release+0x280/0x280 [ 716.385246][ T27] task_work_run+0xdd/0x1a0 [ 716.389782][ T27] do_exit+0xbae/0x2a30 [ 716.394254][ T27] ? lock_acquire+0x442/0x510 [ 716.398943][ T27] ? rcu_read_lock_sched_held+0xd/0x70 [ 716.404874][ T27] ? lock_release+0x522/0x720 [ 716.409578][ T27] ? mm_update_next_owner+0x7a0/0x7a0 [ 716.415273][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 716.420131][ T27] ? do_raw_spin_lock+0x120/0x2b0 [ 716.425373][ T27] ? rwlock_bug.part.0+0x90/0x90 [ 716.430340][ T27] do_group_exit+0x125/0x310 [ 716.435234][ T27] get_signal+0x47f/0x2160 [ 716.439704][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 716.445129][ T27] ? wake_up_q+0xf0/0xf0 [ 716.449433][ T27] arch_do_signal_or_restart+0x2a9/0x1c40 [ 716.455467][ T27] ? rfcomm_sock_connect+0x15f/0x460 [ 716.460778][ T27] ? rfcomm_sock_getname+0x300/0x300 [ 716.466305][ T27] ? __sys_connect_file+0x4e/0x1a0 [ 716.471434][ T27] ? get_sigframe_size+0x10/0x10 [ 716.476649][ T27] ? __sys_connect_file+0x1a0/0x1a0 [ 716.481877][ T27] exit_to_user_mode_prepare+0x17d/0x290 [ 716.487809][ T27] syscall_exit_to_user_mode+0x19/0x60 [ 716.493369][ T27] do_syscall_64+0x42/0xb0 [ 716.497898][ T27] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 716.503887][ T27] RIP: 0033:0x446009 [ 716.507778][ T27] RSP: 002b:00007ffff6ce5058 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 716.516929][ T27] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000446009 [ 716.525319][ T27] RDX: 0000000000000080 RSI: 0000000020000000 RDI: 0000000000000004 [ 716.534179][ T27] RBP: 0000000000000003 R08: 000000ff00000001 R09: 000000ff00000001 [ 716.542151][ T27] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000cae2b8 [ 716.551190][ T27] R13: 0000000000000072 R14: 00007ffff6ce50b0 R15: 0000000000000003 [ 716.559782][ T27] INFO: lockdep is turned off. [ 716.565230][ T27] NMI backtrace for cpu 0 [ 716.569551][ T27] CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 [ 716.578915][ T27] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.589040][ T27] Call Trace: [ 716.592312][ T27] dump_stack_lvl+0xcd/0x134 [ 716.596939][ T27] nmi_cpu_backtrace.cold+0x47/0x144 [ 716.602307][ T27] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.607564][ T27] nmi_trigger_cpumask_backtrace+0x1ae/0x220 [ 716.613566][ T27] watchdog+0xcb7/0xed0 [ 716.617706][ T27] ? trace_sched_process_hang+0x280/0x280 [ 716.623415][ T27] kthread+0x3e5/0x4d0 [ 716.627469][ T27] ? set_kthread_struct+0x130/0x130 [ 716.632651][ T27] ret_from_fork+0x1f/0x30 [ 716.637115][ T27] Sending NMI from CPU 0 to CPUs 1: [ 716.642331][ C1] NMI backtrace for cpu 1 skipped: idling at acpi_idle_do_entry+0x1c6/0x250 [ 716.643314][ T27] Kernel panic - not syncing: hung_task: blocked tasks [ 716.657876][ T27] CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 [ 716.667239][ T27] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.677359][ T27] Call Trace: [ 716.680708][ T27] dump_stack_lvl+0xcd/0x134 [ 716.685302][ T27] panic+0x2b0/0x6dd [ 716.689207][ T27] ? __warn_printk+0xf3/0xf3 [ 716.693779][ T27] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.698977][ T27] ? preempt_schedule_thunk+0x16/0x18 [ 716.704334][ T27] ? nmi_trigger_cpumask_backtrace+0x191/0x220 [ 716.710474][ T27] ? watchdog.cold+0x1b9/0x1de [ 716.715257][ T27] watchdog.cold+0x1ca/0x1de [ 716.719830][ T27] ? trace_sched_process_hang+0x280/0x280 [ 716.725548][ T27] kthread+0x3e5/0x4d0 [ 716.729689][ T27] ? set_kthread_struct+0x130/0x130 [ 716.734870][ T27] ret_from_fork+0x1f/0x30 [ 716.740635][ T27] Kernel Offset: disabled [ 716.744957][ T27] Rebooting in 86400 seconds..