[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.14' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 26.697705] INFO: trying to register non-static key. [ 26.702819] the code is fine but needs lockdep annotation. [ 26.709216] turning off the locking correctness validator. [ 26.714811] CPU: 1 PID: 7980 Comm: syz-executor110 Not tainted 4.14.287-syzkaller #0 [ 26.722673] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 [ 26.732011] Call Trace: [ 26.734576] dump_stack+0x1b2/0x281 [ 26.738179] register_lock_class+0x389/0x1180 [ 26.742648] ? static_obj+0x50/0x50 [ 26.746248] ? save_trace+0xd6/0x290 [ 26.749932] __lock_acquire+0x167/0x3f20 [ 26.753963] ? cpuacct_charge+0x1ca/0x350 [ 26.758082] ? __lock_acquire+0x5fc/0x3f20 [ 26.762287] ? trace_hardirqs_on+0x10/0x10 [ 26.766492] ? __lock_acquire+0x5fc/0x3f20 [ 26.770701] ? trace_hardirqs_on+0x10/0x10 [ 26.774908] lock_acquire+0x170/0x3f0 [ 26.778681] ? flush_work+0x88/0x770 [ 26.782373] ? finish_task_switch+0x178/0x610 [ 26.786839] flush_work+0xad/0x770 [ 26.790349] ? flush_work+0x88/0x770 [ 26.794034] ? worker_thread+0xff0/0xff0 [ 26.798065] ? trace_hardirqs_on_caller+0x3a8/0x580 [ 26.803054] ? _raw_spin_unlock_irq+0x5a/0x80 [ 26.807520] ? finish_task_switch+0x178/0x610 [ 26.811984] ? finish_task_switch+0x14d/0x610 [ 26.816453] ? mark_held_locks+0xa6/0xf0 [ 26.820485] ? __cancel_work_timer+0x2c1/0x460 [ 26.825053] __cancel_work_timer+0x321/0x460 [ 26.829522] ? work_on_cpu_safe+0x70/0x70 [ 26.833645] ? ___preempt_schedule+0x16/0x18 [ 26.838042] ? preempt_schedule_common+0x45/0xc0 [ 26.842770] ? ___preempt_schedule+0x16/0x18 [ 26.847154] ? smc_accept_dequeue+0x382/0x5c0 [ 26.851624] smc_close_active+0x7e2/0xbb0 [ 26.855745] smc_release+0x3e1/0x5d0 [ 26.859437] __sock_release+0xcd/0x2b0 [ 26.863299] ? __sock_release+0x2b0/0x2b0 [ 26.867418] sock_close+0x15/0x20 [ 26.870843] __fput+0x25f/0x7a0 [ 26.874093] task_work_run+0x11f/0x190 [ 26.877952] do_exit+0xa44/0x2850 [ 26.881377] ? ___preempt_schedule+0x16/0x18 [ 26.885756] ? mm_update_next_owner+0x5b0/0x5b0 [ 26.890396] ? smc_listen+0xe3/0x370 [ 26.894080] ? __local_bh_enable_ip+0x132/0x170 [ 26.898718] ? smc_listen+0xe3/0x370 [ 26.902405] ? SyS_listen+0x170/0x210 [ 26.906178] do_group_exit+0x100/0x2e0 [ 26.910038] SyS_exit_group+0x19/0x20 [ 26.913809] ? do_group_exit+0x2e0/0x2e0 [ 26.917844] do_syscall_64+0x1d5/0x640 [ 26.921706] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 26.926870] RIP: 0033:0x7fd29f58ab79 [ 26.930555] RSP: 002b:00007ffd1b1c35b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 26.938236] RAX: ffffffffffffffda RBX: 00007fd29f5fe270 RCX: 00007fd29f58ab79 [ 26.945479] RDX: 000000000000003c RSI