[ 50.904541][ T4547] R13: 000055fae22a30b0 R14: 0000000000000003 R15: 000000000000000e [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Started OpenBSD Secure Shell server. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.129' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 484.089064][ T5] Bluetooth: hci0: command 0x0409 tx timeout [ 486.168837][ T5] Bluetooth: hci0: command 0x041b tx timeout [ 488.248656][ T5] Bluetooth: hci0: command 0x040f tx timeout [ 490.328404][ T5] Bluetooth: hci0: command 0x0419 tx timeout [ 492.408176][ T5] Bluetooth: hci0: command 0x0405 tx timeout [ 605.598684][ T5] Bluetooth: hci0: command 0x0406 tx timeout [ 716.152253][ T26] INFO: task krfcommd:2892 blocked for more than 143 seconds. [ 716.159759][ T26] Not tainted 5.14.0-rc5-next-20210812-syzkaller #0 [ 716.167784][ T26] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.176558][ T26] task:krfcommd state:D stack:29640 pid: 2892 ppid: 2 flags:0x00004000 [ 716.185838][ T26] Call Trace: [ 716.189123][ T26] __schedule+0x93a/0x26f0 [ 716.193895][ T26] ? io_schedule_timeout+0x140/0x140 [ 716.199192][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 716.204471][ T26] schedule+0xd3/0x270 [ 716.208552][ T26] schedule_preempt_disabled+0xf/0x20 [ 716.214265][ T26] __mutex_lock+0xa46/0x1300 [ 716.218873][ T26] ? rfcomm_run+0x2ed/0x4a20 [ 716.223836][ T26] ? mutex_lock_io_nested+0x1160/0x1160 [ 716.229401][ T26] ? lock_downgrade+0x6e0/0x6e0 [ 716.234592][ T26] rfcomm_run+0x2ed/0x4a20 [ 716.239019][ T26] ? find_held_lock+0x2d/0x110 [ 716.244020][ T26] ? rfcomm_check_accept+0x240/0x240 [ 716.249315][ T26] ? lock_downgrade+0x6e0/0x6e0 [ 716.254414][ T26] ? __init_waitqueue_head+0xd0/0xd0 [ 716.259707][ T26] ? _raw_spin_unlock_irqrestore+0x50/0x70 [ 716.265838][ T26] ? lockdep_hardirqs_on+0x79/0x100 [ 716.271044][ T26] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 716.277652][ T26] ? __kthread_parkme+0x15f/0x220 [ 716.283055][ T26] ? rfcomm_check_accept+0x240/0x240 [ 716.288354][ T26] kthread+0x3e5/0x4d0 [ 716.292748][ T26] ? set_kthread_struct+0x130/0x130 [ 716.297952][ T26] ret_from_fork+0x1f/0x30 [ 716.302652][ T26] INFO: task syz-executor962:6629 blocked for more than 143 seconds. [ 716.310710][ T26] Not tainted 5.14.0-rc5-next-20210812-syzkaller #0 [ 716.318085][ T26] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.326812][ T26] task:syz-executor962 state:D stack:28184 pid: 6629 ppid: 6597 flags:0x00004006 [ 716.336080][ T26] Call Trace: [ 716.339389][ T26] __schedule+0x93a/0x26f0 [ 716.344067][ T26] ? io_schedule_timeout+0x140/0x140 [ 716.349416][ T26] ? trace_hardirqs_on+0x5b/0x1c0 [ 716.354764][ T26] ? _raw_spin_unlock_irqrestore+0x3d/0x70 [ 716.360585][ T26] schedule+0xd3/0x270 [ 716.364896][ T26] __lock_sock+0x13d/0x260 [ 716.369401][ T26] ? sock_omalloc+0x180/0x180 [ 716.374301][ T26] ? __rfcomm_dlc_close+0x162/0x8a0 [ 716.379586][ T26] ? finish_wait+0x270/0x270 [ 716.384406][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 716.389353][ T26] lock_sock_nested+0xf6/0x120 [ 716.394356][ T26] rfcomm_sk_state_change+0xb4/0x390 [ 716.399653][ T26] __rfcomm_dlc_close+0x1b6/0x8a0 [ 716.405037][ T26] rfcomm_dlc_close+0x1ea/0x240 [ 716.409909][ T26] __rfcomm_sock_close+0xac/0x260 [ 716.414975][ T26] rfcomm_sock_shutdown+0xe9/0x210 [ 716.420107][ T26] rfcomm_sock_release+0x5f/0x140 [ 716.425158][ T26] __sock_release+0xcd/0x280 [ 716.429818][ T26] sock_close+0x18/0x20 [ 716.433996][ T26] __fput+0x288/0x9f0 [ 716.438024][ T26] ? __sock_release+0x280/0x280 [ 716.443061][ T26] task_work_run+0xdd/0x1a0 [ 716.447571][ T26] do_exit+0xbd4/0x2a60 [ 716.451768][ T26] ? lock_acquire+0x442/0x510 [ 716.456465][ T26] ? rcu_read_lock_sched_held+0xd/0x70 [ 716.461980][ T26] ? lock_release+0x522/0x720 [ 716.466689][ T26] ? mm_update_next_owner+0x7a0/0x7a0 [ 716.472113][ T26] ? lock_downgrade+0x6e0/0x6e0 [ 716.476957][ T26] ? do_raw_spin_lock+0x120/0x2b0 [ 716.481965][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 716.486936][ T26] do_group_exit+0x125/0x310 [ 716.491530][ T26] get_signal+0x47f/0x2160 [ 716.496023][ T26] ? lock_downgrade+0x6e0/0x6e0 [ 716.500871][ T26] ? wake_up_q+0xf0/0xf0 [ 716.505181][ T26] arch_do_signal_or_restart+0x2a9/0x1c40 [ 716.510962][ T26] ? rfcomm_sock_connect+0x15f/0x460 [ 716.516273][ T26] ? rfcomm_sock_getname+0x300/0x300 [ 716.521589][ T26] ? __sys_connect_file+0x4e/0x1a0 [ 716.526745][ T26] ? get_sigframe_size+0x10/0x10 [ 716.531687][ T26] ? __sys_connect_file+0x1a0/0x1a0 [ 716.536964][ T26] exit_to_user_mode_prepare+0x17d/0x290 [ 716.542716][ T26] syscall_exit_to_user_mode+0x19/0x60 [ 716.548182][ T26] do_syscall_64+0x42/0xb0 [ 716.552674][ T26] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 716.558568][ T26] RIP: 0033:0x446009 [ 716.562492][ T26] RSP: 002b:00007ffff96aa918 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 716.570907][ T26] RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000446009 [ 716.578942][ T26] RDX: 0000000000000080 RSI: 0000000020000000 RDI: 0000000000000004 [ 716.586954][ T26] RBP: 0000000000000003 R08: 000000ff00000001 R09: 000000ff00000001 [ 716.594950][ T26] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000dfa2b8 [ 716.602961][ T26] R13: 0000000000000009 R14: 00007ffff96aa970 R15: 0000000000000003 [ 716.610951][ T26] INFO: lockdep is turned off. [ 716.615734][ T26] NMI backtrace for cpu 1 [ 716.620052][ T26] CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.14.0-rc5-next-20210812-syzkaller #0 [ 716.629399][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.639531][ T26] Call Trace: [ 716.642795][ T26] dump_stack_lvl+0xcd/0x134 [ 716.647431][ T26] nmi_cpu_backtrace.cold+0x47/0x144 [ 716.652704][ T26] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.657936][ T26] nmi_trigger_cpumask_backtrace+0x1ae/0x220 [ 716.663953][ T26] watchdog+0xcb7/0xed0 [ 716.668110][ T26] ? trace_sched_process_hang+0x280/0x280 [ 716.673832][ T26] kthread+0x3e5/0x4d0 [ 716.677904][ T26] ? set_kthread_struct+0x130/0x130 [ 716.683098][ T26] ret_from_fork+0x1f/0x30 [ 716.687626][ T26] Sending NMI from CPU 1 to CPUs 0: [ 716.692857][ C0] NMI backtrace for cpu 0 [ 716.692868][ C0] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.14.0-rc5-next-20210812-syzkaller #0 [ 716.692889][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.692902][ C0] Workqueue: events_unbound toggle_allocation_gate [ 716.692977][ C0] RIP: 0010:inat_get_opcode_attribute+0x28/0x50 [ 716.693014][ C0] Code: cc cc 53 89 fb e8 68 1d 81 fd 0f b6 db 48 b8 00 00 00 00 00 fc ff df 48 8d 3c 9d 00 b9 e7 89 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 09 8b 04 9d 00 b9 [ 716.693038][ C0] RSP: 0018:ffffc90000cd78f8 EFLAGS: 00000a03 [ 716.693053][ C0] RAX: dffffc0000000000 RBX: 00000000000000e9 RCX: 0000000000000000 [ 716.693066][ C0] RDX: 0000000000000000 RSI: ffffffff83f49c28 RDI: ffffffff89e7bca4 [ 716.693078][ C0] RBP: dffffc0000000000 R08: 0000000000000001 R09: 000000000000000f [ 716.693090][ C0] R10: ffffffff83f4f59b R11: 00000000000000e9 R12: 0000000000000000 [ 716.693103][ C0] R13: 00000000000000e9 R14: dffffc0000000000 R15: 00000000000000e9 [ 716.693116][ C0] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 716.693135][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 716.693150][ C0] CR2: 00007f9cdefba000 CR3: 000000000b68e000 CR4: 00000000001506f0 [ 716.693163][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 716.693174][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 716.693186][ C0] Call Trace: [ 716.693193][ C0] insn_get_prefixes.part.0+0x293/0x1200 [ 716.693218][ C0] ? kmem_cache_alloc_bulk+0x179/0x710 [ 716.693262][ C0] ? kmem_cache_alloc_bulk+0x188/0x710 [ 716.693288][ C0] insn_get_modrm+0x646/0x7c0 [ 716.693310][ C0] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 716.693333][ C0] ? cpumask_any_but+0x155/0x1a0 [ 716.693352][ C0] ? kmem_cache_alloc_bulk+0x188/0x710 [ 716.693375][ C0] insn_get_sib+0x29c/0x330 [ 716.693403][ C0] insn_get_displacement+0x31c/0x660 [ 716.693427][ C0] ? kmem_cache_alloc_bulk+0x179/0x710 [ 716.693450][ C0] ? kmem_cache_alloc_bulk+0x188/0x710 [ 716.693472][ C0] insn_decode+0x473/0x4e0 [ 716.693495][ C0] ? kmem_cache_alloc_bulk+0x179/0x710 [ 716.693518][ C0] arch_jump_entry_size+0xa0/0x110 [ 716.693553][ C0] ? arch_jump_entry_size.part.0+0x10/0x10 [ 716.693575][ C0] ? rcu_read_lock_sched_held+0xd/0x70 [ 716.693603][ C0] ? kmem_cache_alloc_bulk+0x179/0x710 [ 716.693626][ C0] ? kmem_cache_alloc_bulk+0x188/0x710 [ 716.693650][ C0] ? kmem_cache_alloc_bulk+0x179/0x710 [ 716.693676][ C0] ? static_key_disable_cpuslocked+0x108/0x1b0 [ 716.693716][ C0] ? kmem_cache_alloc_bulk+0x3eb/0x710 [ 716.693739][ C0] __jump_label_patch+0x7c/0x1b0 [ 716.693760][ C0] arch_jump_label_transform_queue+0x63/0x100 [ 716.693782][ C0] ? lock_release+0x522/0x720 [ 716.693802][ C0] __jump_label_update+0x12e/0x400 [ 716.693825][ C0] jump_label_update+0x1d5/0x430 [ 716.693846][ C0] static_key_disable_cpuslocked+0x152/0x1b0 [ 716.693869][ C0] static_key_disable+0x16/0x20 [ 716.693888][ C0] toggle_allocation_gate+0x185/0x390 [ 716.693908][ C0] ? lock_release+0x720/0x720 [ 716.693927][ C0] ? wake_up_kfence_timer+0x20/0x20 [ 716.693951][ C0] ? read_word_at_a_time+0xe/0x20 [ 716.693969][ C0] ? strscpy+0xa1/0x2b0 [ 716.693987][ C0] process_one_work+0x98d/0x1630 [ 716.694017][ C0] ? pwq_dec_nr_in_flight+0x320/0x320 [ 716.694043][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 716.694068][ C0] worker_thread+0x658/0x11f0 [ 716.694095][ C0] ? process_one_work+0x1630/0x1630 [ 716.694120][ C0] kthread+0x3e5/0x4d0 [ 716.694141][ C0] ? set_kthread_struct+0x130/0x130 [ 716.694165][ C0] ret_from_fork+0x1f/0x30 [ 716.694194][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.337 msecs [ 716.702134][ T26] Kernel panic - not syncing: hung_task: blocked tasks [ 717.069841][ T26] CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.14.0-rc5-next-20210812-syzkaller #0 [ 717.079210][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 717.089241][ T26] Call Trace: [ 717.092503][ T26] dump_stack_lvl+0xcd/0x134 [ 717.097077][ T26] panic+0x2b0/0x6dd [ 717.100977][ T26] ? __warn_printk+0xf3/0xf3 [ 717.105554][ T26] ? lapic_can_unplug_cpu+0x80/0x80 [ 717.110735][ T26] ? preempt_schedule_thunk+0x16/0x18 [ 717.116091][ T26] ? nmi_trigger_cpumask_backtrace+0x191/0x220 [ 717.122245][ T26] ? watchdog.cold+0x1b9/0x1de [ 717.127024][ T26] watchdog.cold+0x1ca/0x1de [ 717.131596][ T26] ? trace_sched_process_hang+0x280/0x280 [ 717.137386][ T26] kthread+0x3e5/0x4d0 [ 717.141439][ T26] ? set_kthread_struct+0x130/0x130 [ 717.146624][ T26] ret_from_fork+0x1f/0x30 [ 717.152313][ T26] Kernel Offset: disabled [ 717.156910][ T26] Rebooting in 86400 seconds..