[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.243' (ECDSA) to the list of known hosts. executing program executing program executing program executing program syzkaller login: [ 715.752889][ T1655] INFO: task syz-executor687:8514 blocked for more than 143 seconds. [ 715.762258][ T1655] Not tainted 5.14.0-syzkaller #0 [ 715.768332][ T1655] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 715.777412][ T1655] task:syz-executor687 state:D stack:27296 pid: 8514 ppid: 8479 flags:0x00024004 [ 715.787211][ T1655] Call Trace: [ 715.790496][ T1655] __schedule+0x940/0x26f0 [ 715.795454][ T1655] ? io_schedule_timeout+0x140/0x140 [ 715.800748][ T1655] schedule+0xd3/0x270 [ 715.805132][ T1655] schedule_timeout+0x1db/0x2a0 [ 715.810188][ T1655] ? usleep_range+0x170/0x170 [ 715.815314][ T1655] ? wait_for_completion+0x16e/0x280 [ 715.820597][ T1655] ? lock_downgrade+0x6e0/0x6e0 [ 715.825501][ T1655] ? do_raw_spin_lock+0x120/0x2b0 [ 715.830540][ T1655] ? rwlock_bug.part.0+0x90/0x90 [ 715.835570][ T1655] ? _raw_spin_unlock_irq+0x1f/0x40 [ 715.840876][ T1655] wait_for_completion+0x176/0x280 [ 715.846038][ T1655] ? io_wq_put_and_exit+0x3b6/0xc70 [ 715.851439][ T1655] ? bit_wait_io_timeout+0x160/0x160 [ 715.856794][ T1655] ? lockdep_hardirqs_on+0x79/0x100 [ 715.861998][ T1655] ? _raw_spin_unlock_irqrestore+0x3d/0x70 [ 715.867836][ T1655] ? io_wq_work_match_all+0x10/0x10 [ 715.873125][ T1655] io_wq_put_and_exit+0x40c/0xc70 [ 715.878351][ T1655] ? kfree+0xe4/0x540 [ 715.882515][ T1655] ? io_wq_exit_start+0x20/0x20 [ 715.887837][ T1655] io_uring_cancel_generic+0x5fe/0x740 [ 715.893425][ T1655] ? __io_uring_free+0x170/0x170 [ 715.898372][ T1655] ? finish_task_switch.isra.0+0x232/0xa50 [ 715.904246][ T1655] ? finish_wait+0x270/0x270 [ 715.908848][ T1655] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 715.915191][ T1655] ? __validate_process_creds+0x20c/0x370 [ 715.921084][ T1655] do_exit+0x265/0x2a30 [ 715.925274][ T1655] ? io_schedule_timeout+0x140/0x140 [ 715.930650][ T1655] ? mm_update_next_owner+0x7a0/0x7a0 [ 715.936107][ T1655] ? preempt_schedule_thunk+0x16/0x18 [ 715.941480][ T1655] ? preempt_schedule_common+0x59/0xc0 [ 715.946972][ T1655] do_group_exit+0x125/0x310 [ 715.951562][ T1655] get_signal+0x47f/0x2160 [ 715.956052][ T1655] ? rcu_is_watching+0x54/0xc0 [ 715.961055][ T1655] arch_do_signal_or_restart+0x2a9/0x1c40 [ 715.967555][ T1655] ? queue_work_on+0xda/0x110 [ 715.972235][ T1655] ? lockdep_hardirqs_on+0x79/0x100 [ 715.978428][ T1655] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 715.985725][ T1655] ? get_sigframe_size+0x10/0x10 [ 715.990853][ T1655] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 715.997275][ T1655] ? task_work_run+0x14e/0x1a0 [ 716.002098][ T1655] exit_to_user_mode_prepare+0x17d/0x290 [ 716.007767][ T1655] syscall_exit_to_user_mode+0x19/0x60 [ 716.013333][ T1655] do_syscall_64+0x42/0xb0 [ 716.017980][ T1655] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 716.027623][ T1655] RIP: 0033:0x445cd9 [ 716.031545][ T1655] RSP: 002b:00007fc657f4b308 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 716.040273][ T1655] RAX: 0000000000000001 RBX: 00000000004cb448 RCX: 0000000000445cd9 [ 716.049540][ T1655] RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00000000004cb44c [ 716.060568][ T1655] RBP: 00000000004cb440 R08: 000000000000000e R09: 0000000000000000 [ 716.068718][ T1655] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049b154 [ 716.078439][ T1655] R13: 0000000000000003 R14: 00007fc657f4b400 R15: 0000000000022000 [ 716.088488][ T1655] [ 716.088488][ T1655] Showing all locks held in the system: [ 716.096296][ T1655] 1 lock held by khungtaskd/1655: [ 716.101728][ T1655] #0: ffffffff8b97f960 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 716.112577][ T1655] [ 716.115205][ T1655] ============================================= [ 716.115205][ T1655] [ 716.123731][ T1655] NMI backtrace for cpu 1 [ 716.128078][ T1655] CPU: 1 PID: 1655 Comm: khungtaskd Not tainted 5.14.0-syzkaller #0 [ 716.136234][ T1655] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.146878][ T1655] Call Trace: [ 716.150158][ T1655] dump_stack_lvl+0xcd/0x134 [ 716.154764][ T1655] nmi_cpu_backtrace.cold+0x47/0x144 [ 716.160256][ T1655] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.165445][ T1655] nmi_trigger_cpumask_backtrace+0x1ae/0x220 [ 716.171420][ T1655] watchdog+0xc1d/0xf50 [ 716.175567][ T1655] ? reset_hung_task_detector+0x30/0x30 [ 716.181107][ T1655] kthread+0x3e5/0x4d0 [ 716.185167][ T1655] ? set_kthread_struct+0x130/0x130 [ 716.190378][ T1655] ret_from_fork+0x1f/0x30 [ 716.194894][ T1655] Sending NMI from CPU 1 to CPUs 0: [ 716.200104][ C0] NMI backtrace for cpu 0 [ 716.200114][ C0] CPU: 0 PID: 10 Comm: kworker/u4:1 Not tainted 5.14.0-syzkaller #0 [ 716.200131][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.200141][ C0] Workqueue: events_unbound toggle_allocation_gate [ 716.200161][ C0] RIP: 0010:__text_poke+0x5f0/0x8c0 [ 716.200180][ C0] Code: fb 48 8b 7c 24 60 e8 5f 67 0d 08 48 8b 4c 24 18 48 b8 00 00 00 00 00 fc ff df 48 c7 04 01 00 00 00 00 48 8b 84 24 98 00 00 00 <65> 48 2b 04 25 28 00 00 00 0f 85 2e 02 00 00 48 81 c4 a0 00 00 00 [ 716.200194][ C0] RSP: 0018:ffffc90000cf7a00 EFLAGS: 00000286 [ 716.200204][ C0] RAX: cfe52cf07638a100 RBX: 0000000000000007 RCX: 1ffff9200019ef48 [ 716.200214][ C0] RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000001 [ 716.200222][ C0] RBP: ffff888011eaa558 R08: 0000000000000000 R09: ffff888010db8123 [ 716.200232][ C0] R10: ffffed10021b7024 R11: 000000000000003f R12: ffffffff81bcfd53 [ 716.200241][ C0] R13: 0000000000000001 R14: 0000000000000d54 R15: ffffffff8baa9900 [ 716.200253][ C0] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 716.200267][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 716.200277][ C0] CR2: 00007f442218f000 CR3: 000000000b68e000 CR4: 0000000000350ef0 [ 716.200286][ C0] Call Trace: [ 716.200292][ C0] ? text_poke_loc_init+0x340/0x340 [ 716.200309][ C0] ? __kmalloc_node+0xc3/0x380 [ 716.200327][ C0] text_poke_bp_batch+0x3d7/0x560 [ 716.200344][ C0] ? mutex_lock_io_nested+0x1150/0x1150 [ 716.200359][ C0] ? alternatives_enable_smp+0xf0/0xf0 [ 716.200375][ C0] ? __jump_label_patch+0x159/0x1b0 [ 716.200391][ C0] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 716.200408][ C0] ? __jump_label_update+0x351/0x400 [ 716.200425][ C0] text_poke_finish+0x16/0x30 [ 716.200440][ C0] arch_jump_label_transform_apply+0x13/0x20 [ 716.200455][ C0] jump_label_update+0x1d5/0x430 [ 716.200472][ C0] static_key_enable_cpuslocked+0x1b1/0x260 [ 716.200488][ C0] static_key_enable+0x16/0x20 [ 716.200503][ C0] toggle_allocation_gate+0x100/0x390 [ 716.200518][ C0] ? lock_release+0x720/0x720 [ 716.200532][ C0] ? wake_up_kfence_timer+0x20/0x20 [ 716.200552][ C0] process_one_work+0x9bf/0x16b0 [ 716.200572][ C0] ? pwq_dec_nr_in_flight+0x2a0/0x2a0 [ 716.200591][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 716.200606][ C0] ? _raw_spin_lock_irq+0x41/0x50 [ 716.200623][ C0] worker_thread+0x658/0x11f0 [ 716.200643][ C0] ? process_one_work+0x16b0/0x16b0 [ 716.200661][ C0] kthread+0x3e5/0x4d0 [ 716.200676][ C0] ? set_kthread_struct+0x130/0x130 [ 716.200692][ C0] ret_from_fork+0x1f/0x30 [ 716.202371][ T1655] Kernel panic - not syncing: hung_task: blocked tasks [ 716.471113][ T1655] CPU: 1 PID: 1655 Comm: khungtaskd Not tainted 5.14.0-syzkaller #0 [ 716.479076][ T1655] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.489114][ T1655] Call Trace: [ 716.492378][ T1655] dump_stack_lvl+0xcd/0x134 [ 716.496958][ T1655] panic+0x2b0/0x6dd [ 716.500842][ T1655] ? __warn_printk+0xf3/0xf3 [ 716.505418][ T1655] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.510739][ T1655] ? preempt_schedule_thunk+0x16/0x18 [ 716.516097][ T1655] ? nmi_trigger_cpumask_backtrace+0x191/0x220 [ 716.522239][ T1655] ? watchdog.cold+0x130/0x158 [ 716.527173][ T1655] watchdog.cold+0x141/0x158 [ 716.531755][ T1655] ? reset_hung_task_detector+0x30/0x30 [ 716.537298][ T1655] kthread+0x3e5/0x4d0 [ 716.541353][ T1655] ? set_kthread_struct+0x130/0x130 [ 716.549683][ T1655] ret_from_fork+0x1f/0x30 [ 716.560767][ T1655] Kernel Offset: disabled [ 716.565554][ T1655] Rebooting in 86400 seconds..