[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.25' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 487.929434][ T1929] Bluetooth: hci0: command 0x0409 tx timeout [ 490.009225][ T1929] Bluetooth: hci0: command 0x041b tx timeout [ 492.089106][ T6621] Bluetooth: hci0: command 0x040f tx timeout [ 494.168842][ T6621] Bluetooth: hci0: command 0x0419 tx timeout [ 496.248627][ T6621] Bluetooth: hci0: command 0x0405 tx timeout [ 610.639528][ T6621] Bluetooth: hci0: command 0x0406 tx timeout [ 716.073726][ T26] INFO: task krfcommd:2892 blocked for more than 143 seconds. [ 716.081227][ T26] Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 [ 716.089174][ T26] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.097955][ T26] task:krfcommd state:D stack:28952 pid: 2892 ppid: 2 flags:0x00004000 [ 716.107258][ T26] Call Trace: [ 716.110543][ T26] __schedule+0x93a/0x26f0 [ 716.115375][ T26] ? io_schedule_timeout+0x140/0x140 [ 716.120740][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 716.126047][ T26] schedule+0xd3/0x270 [ 716.130130][ T26] schedule_preempt_disabled+0xf/0x20 [ 716.135863][ T26] __mutex_lock+0xa46/0x1300 [ 716.140470][ T26] ? rfcomm_run+0x2ed/0x4a20 [ 716.145481][ T26] ? mutex_lock_io_nested+0x1160/0x1160 [ 716.151054][ T26] ? lock_downgrade+0x6e0/0x6e0 [ 716.156202][ T26] rfcomm_run+0x2ed/0x4a20 [ 716.160633][ T26] ? find_held_lock+0x2d/0x110 [ 716.165664][ T26] ? rfcomm_check_accept+0x240/0x240 [ 716.170959][ T26] ? lock_downgrade+0x6e0/0x6e0 [ 716.176126][ T26] ? __init_waitqueue_head+0xd0/0xd0 [ 716.181525][ T26] ? _raw_spin_unlock_irqrestore+0x50/0x70 [ 716.187701][ T26] ? lockdep_hardirqs_on+0x79/0x100 [ 716.193005][ T26] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 716.199696][ T26] ? __kthread_parkme+0x15f/0x220 [ 716.205054][ T26] ? rfcomm_check_accept+0x240/0x240 [ 716.210361][ T26] kthread+0x3e5/0x4d0 [ 716.214735][ T26] ? set_kthread_struct+0x130/0x130 [ 716.219953][ T26] ret_from_fork+0x1f/0x30 [ 716.224790][ T26] INFO: task syz-executor671:6619 blocked for more than 143 seconds. [ 716.232866][ T26] Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 [ 716.240218][ T26] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.248965][ T26] task:syz-executor671 state:D stack:28184 pid: 6619 ppid: 6587 flags:0x00004006 [ 716.258259][ T26] Call Trace: [ 716.261551][ T26] __schedule+0x93a/0x26f0 [ 716.266260][ T26] ? io_schedule_timeout+0x140/0x140 [ 716.271567][ T26] ? trace_hardirqs_on+0x5b/0x1c0 [ 716.276965][ T26] ? _raw_spin_unlock_irqrestore+0x3d/0x70 [ 716.282790][ T26] schedule+0xd3/0x270 [ 716.287155][ T26] __lock_sock+0x13d/0x260 [ 716.291651][ T26] ? sock_omalloc+0x180/0x180 [ 716.296625][ T26] ? __rfcomm_dlc_close+0x162/0x8a0 [ 716.301910][ T26] ? finish_wait+0x270/0x270 [ 716.306772][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 716.311726][ T26] lock_sock_nested+0xf6/0x120 [ 716.316772][ T26] rfcomm_sk_state_change+0xb4/0x390 [ 716.322076][ T26] __rfcomm_dlc_close+0x1b6/0x8a0 [ 716.327413][ T26] rfcomm_dlc_close+0x1ea/0x240 [ 716.332293][ T26] __rfcomm_sock_close+0xac/0x260 [ 716.337593][ T26] rfcomm_sock_shutdown+0xe9/0x210 [ 716.342722][ T26] rfcomm_sock_release+0x5f/0x140 [ 716.348041][ T26] __sock_release+0xcd/0x280 [ 716.352695][ T26] sock_close+0x18/0x20 [ 716.357168][ T26] __fput+0x288/0x9f0 [ 716.361276][ T26] ? __sock_release+0x280/0x280 [ 716.366403][ T26] task_work_run+0xdd/0x1a0 [ 716.370919][ T26] do_exit+0xbae/0x2a30 [ 716.375409][ T26] ? lock_acquire+0x442/0x510 [ 716.380093][ T26] ? rcu_read_lock_sched_held+0xd/0x70 [ 716.386000][ T26] ? lock_release+0x522/0x720 [ 716.390684][ T26] ? mm_update_next_owner+0x7a0/0x7a0 [ 716.396366][ T26] ? lock_downgrade+0x6e0/0x6e0 [ 716.401241][ T26] ? do_raw_spin_lock+0x120/0x2b0 [ 716.406553][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 716.411505][ T26] do_group_exit+0x125/0x310 [ 716.416369][ T26] get_signal+0x47f/0x2160 [ 716.420867][ T26] ? lock_downgrade+0x6e0/0x6e0 [ 716.425964][ T26] ? wake_up_q+0xf0/0xf0 [ 716.430290][ T26] arch_do_signal_or_restart+0x2a9/0x1c40 [ 716.437193][ T26] ? rfcomm_sock_connect+0x15f/0x460 [ 716.442489][ T26] ? rfcomm_sock_getname+0x300/0x300 [ 716.448038][ T26] ? __sys_connect_file+0x4e/0x1a0 [ 716.453272][ T26] ? get_sigframe_size+0x10/0x10 [ 716.458473][ T26] ? __sys_connect_file+0x1a0/0x1a0 [ 716.463788][ T26] exit_to_user_mode_prepare+0x17d/0x290 [ 716.469506][ T26] syscall_exit_to_user_mode+0x19/0x60 [ 716.475233][ T26] do_syscall_64+0x42/0xb0 [ 716.479709][ T26] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 716.485924][ T26] RIP: 0033:0x445fe9 [ 716.489818][ T26] RSP: 002b:00007ffea1a3d6b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 716.498484][ T26] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000445fe9 [ 716.506516][ T26] RDX: 0000000000000080 RSI: 0000000020000000 RDI: 0000000000000004 [ 716.514605][ T26] RBP: 0000000000000003 R08: 000000ff00000001 R09: 000000ff00000001 [ 716.522645][ T26] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000aba2b8 [ 716.531033][ T26] R13: 0000000000000072 R14: 00007ffea1a3d710 R15: 0000000000000003 [ 716.539403][ T26] INFO: lockdep is turned off. [ 716.544480][ T26] NMI backtrace for cpu 0 [ 716.549022][ T26] CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 [ 716.558376][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.568415][ T26] Call Trace: [ 716.571677][ T26] dump_stack_lvl+0xcd/0x134 [ 716.576280][ T26] nmi_cpu_backtrace.cold+0x47/0x144 [ 716.581546][ T26] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.586780][ T26] nmi_trigger_cpumask_backtrace+0x1ae/0x220 [ 716.592773][ T26] watchdog+0xcb7/0xed0 [ 716.596911][ T26] ? trace_sched_process_hang+0x280/0x280 [ 716.602610][ T26] kthread+0x3e5/0x4d0 [ 716.606700][ T26] ? set_kthread_struct+0x130/0x130 [ 716.611881][ T26] ret_from_fork+0x1f/0x30 [ 716.616452][ T26] Sending NMI from CPU 0 to CPUs 1: [ 716.621665][ C1] NMI backtrace for cpu 1 [ 716.621676][ C1] CPU: 1 PID: 499 Comm: kworker/u4:4 Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 [ 716.621700][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.621715][ C1] Workqueue: events_unbound toggle_allocation_gate [ 716.621808][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x60 [ 716.621837][ C1] Code: 81 e1 00 01 00 00 65 48 8b 14 25 40 f0 01 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 3c 15 00 00 85 c0 74 2b 8b 82 18 15 00 00 <83> f8 02 75 20 48 8b 8a 20 15 00 00 8b 92 1c 15 00 00 48 8b 01 48 [ 716.621857][ C1] RSP: 0018:ffffc900030df980 EFLAGS: 00000046 [ 716.621873][ C1] RAX: 0000000000000000 RBX: 0000000000000008 RCX: 0000000000000000 [ 716.621887][ C1] RDX: ffff88801a000000 RSI: ffffffff83f0379f RDI: 0000000000000003 [ 716.621901][ C1] RBP: 0000000000000008 R08: 0000000000000000 R09: 000000000000886a [ 716.621914][ C1] R10: ffffffff83f03868 R11: 000000000000003f R12: 0000000000000001 [ 716.621928][ C1] R13: ffff888010e68670 R14: 0000000000000007 R15: 0000000000000001 [ 716.621942][ C1] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 716.621963][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 716.621979][ C1] CR2: 00007f33c6f54000 CR3: 000000000b68e000 CR4: 00000000001506e0 [ 716.621994][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 716.622006][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 716.622020][ C1] Call Trace: [ 716.622026][ C1] cpumask_any_but+0x6f/0x1a0 [ 716.622051][ C1] flush_tlb_mm_range+0xb5/0x230 [ 716.622103][ C1] ? __kmalloc+0xc1/0x320 [ 716.622144][ C1] __text_poke+0x590/0x8c0 [ 716.622187][ C1] ? text_poke_loc_init+0x340/0x340 [ 716.622212][ C1] ? __text_poke+0x8c0/0x8c0 [ 716.622235][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 716.622263][ C1] text_poke_bp_batch+0x2eb/0x560 [ 716.622289][ C1] ? mutex_lock_io_nested+0x1160/0x1160 [ 716.622319][ C1] ? alternatives_enable_smp+0xf0/0xf0 [ 716.622344][ C1] ? __jump_label_patch+0x159/0x1b0 [ 716.622369][ C1] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 716.622395][ C1] ? __jump_label_update+0x351/0x400 [ 716.622441][ C1] text_poke_finish+0x16/0x30 [ 716.622465][ C1] arch_jump_label_transform_apply+0x13/0x20 [ 716.622490][ C1] jump_label_update+0x1d5/0x430 [ 716.622514][ C1] static_key_enable_cpuslocked+0x1b1/0x260 [ 716.622539][ C1] static_key_enable+0x16/0x20 [ 716.622561][ C1] toggle_allocation_gate+0x100/0x390 [ 716.622585][ C1] ? lock_release+0x720/0x720 [ 716.622608][ C1] ? wake_up_kfence_timer+0x20/0x20 [ 716.622634][ C1] ? read_word_at_a_time+0xe/0x20 [ 716.622655][ C1] ? strscpy+0xa1/0x2b0 [ 716.622675][ C1] process_one_work+0x98d/0x1630 [ 716.622708][ C1] ? pwq_dec_nr_in_flight+0x320/0x320 [ 716.622738][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 716.622765][ C1] worker_thread+0x658/0x11f0 [ 716.622797][ C1] ? process_one_work+0x1630/0x1630 [ 716.622825][ C1] kthread+0x3e5/0x4d0 [ 716.622848][ C1] ? set_kthread_struct+0x130/0x130 [ 716.622875][ C1] ret_from_fork+0x1f/0x30 [ 716.622906][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.242 msecs [ 716.624198][ T26] Kernel panic - not syncing: hung_task: blocked tasks [ 716.940658][ T26] CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.14.0-rc5-next-20210813-syzkaller #0 [ 716.950045][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.960088][ T26] Call Trace: [ 716.963372][ T26] dump_stack_lvl+0xcd/0x134 [ 716.967964][ T26] panic+0x2b0/0x6dd [ 716.972074][ T26] ? __warn_printk+0xf3/0xf3 [ 716.976658][ T26] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.981862][ T26] ? preempt_schedule_thunk+0x16/0x18 [ 716.987255][ T26] ? nmi_trigger_cpumask_backtrace+0x191/0x220 [ 716.993409][ T26] ? watchdog.cold+0x1b9/0x1de [ 716.998195][ T26] watchdog.cold+0x1ca/0x1de [ 717.003480][ T26] ? trace_sched_process_hang+0x280/0x280 [ 717.009202][ T26] kthread+0x3e5/0x4d0 [ 717.013271][ T26] ? set_kthread_struct+0x130/0x130 [ 717.018471][ T26] ret_from_fork+0x1f/0x30 [ 717.024247][ T26] Kernel Offset: disabled [ 717.028559][ T26] Rebooting in 86400 seconds..