[....] Starting OpenBSD Secure Shell server: sshd[ 19.498733] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.243572] random: sshd: uninitialized urandom read (32 bytes read) [ 25.454519] random: sshd: uninitialized urandom read (32 bytes read) [ 25.971412] random: sshd: uninitialized urandom read (32 bytes read) [ 26.124581] sshd (4407) used greatest stack depth: 17176 bytes left [ 46.829255] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.35' (ECDSA) to the list of known hosts. [ 52.290685] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 59.916789] ------------[ cut here ]------------ [ 59.923710] ODEBUG: init active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x90 [ 59.934011] WARNING: CPU: 1 PID: 12456 at lib/debugobjects.c:329 debug_print_object+0x16a/0x210 [ 59.942853] Kernel panic - not syncing: panic_on_warn set ... [ 59.942853] [ 59.950232] CPU: 1 PID: 12456 Comm: syz-executor648 Not tainted 4.18.0-rc7+ #176 [ 59.957760] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 59.967113] Call Trace: [ 59.969714] dump_stack+0x1c9/0x2b4 [ 59.973356] ? dump_stack_print_info.cold.2+0x52/0x52 [ 59.978569] panic+0x238/0x4e7 [ 59.981766] ? add_taint.cold.5+0x16/0x16 [ 59.985922] ? __warn.cold.8+0x148/0x1ba [ 59.989991] ? __warn.cold.8+0x117/0x1ba [ 59.994058] ? debug_print_object+0x16a/0x210 [ 59.998557] __warn.cold.8+0x163/0x1ba [ 60.002455] ? debug_print_object+0x16a/0x210 [ 60.006961] report_bug+0x252/0x2d0 [ 60.010593] do_error_trap+0x1fc/0x4d0 [ 60.014486] ? math_error+0x3e0/0x3e0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 60.018291] ? __internal_add_timer+0x2e0/0x2e0 [ 60.022968] ? vprintk_default+0x28/0x30 [ 60.027034] ? vprintk_func+0x81/0xe7 [ 60.030846] ? printk+0xa7/0xcf [ 60.034138] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 60.038986] do_invalid_op+0x1b/0x20 [ 60.042706] invalid_op+0x14/0x20 [ 60.046174] RIP: 0010:debug_print_object+0x16a/0x210 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 60.051274] Code: 3a 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 92 00 00 00 48 8b 14 dd a0 74 3a 87 4c 89 f6 48 c7 c7 40 6a 3a 87 e8 c6 af e6 fd <0f> 0b 83 05 29 e6 29 05 01 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f [ 60.070549] RSP: 0018:ffff8801b5727658 EFLAGS: 00010082 [ 60.075921] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 60.083190] RDX: 0000000000000000 RSI: ffffffff81632481 RDI: 0000000000000001 [ 60.090466] RBP: ffff8801b5727698 R08: ffff8801b6456040 R09: ffffed003b623ec2 [ 60.097739] R10: ffffed003b623ec2 R11: ffff8801db11f617 R12: 0000000000000001 [ 60.105008] R13: ffffffff87f9c9e0 R14: ffffffff873a7040 R15: ffffffff816918a0 [ 60.112290] ? __internal_add_timer+0x2e0/0x2e0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 60.116976] ? vprintk_func+0x81/0xe7 [ 60.120785] ? debug_print_object+0x16a/0x210 [ 60.125288] __debug_object_init+0x8e9/0x12e0 [ 60.129790] ? debug_object_free+0x690/0x690 [ 60.134216] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 60.139279] ? trace_hardirqs_on+0xd/0x10 [ 60.143436] ? __debug_object_init+0x581/0x12e0 [ 60.148112] ? debug_object_free+0x690/0x690 [ 60.152530] ? mark_held_locks+0xc9/0x160 [ 60.156686] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 60.161281] ? _raw_spin_unlock_irqrestore+0x74/0xc0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 60.166392] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 60.171425] ? trace_hardirqs_on+0xd/0x10 [ 60.175586] debug_object_init+0x16/0x20 [ 60.179661] init_timer_key+0xa9/0x490 [ 60.183554] ? __queue_work+0x1410/0x1410 [ 60.187712] ? init_timer_on_stack_key+0xe0/0xe0 [ 60.192473] ? __local_bh_enable_ip+0x161/0x230 [ 60.197151] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 60.202171] ? lock_sock_nested+0x9f/0x120 [ 60.206422] ? __lockdep_init_map+0x105/0x590 [ 60.210936] vsock_stream_connect+0xc7a/0xfc0 [ 60.215444] ? vsock_dgram_connect+0x500/0x500 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 60.220060] ? lock_downgrade+0x8f0/0x8f0 [ 60.224228] ? finish_wait+0x430/0x430 [ 60.228120] ? lock_release+0xa30/0xa30 [ 60.232109] ? check_same_owner+0x340/0x340 [ 60.236448] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 60.241990] ? _copy_from_user+0xdf/0x150 [ 60.246147] ? security_socket_connect+0x94/0xc0 [ 60.250913] __sys_connect+0x37d/0x4c0 [ 60.254804] ? do_fcntl+0x131/0x14f0 [ 60.258523] ? __ia32_sys_accept+0xb0/0xb0 [ 60.262756] ? f_getown+0xc0/0xc0 [ 60.266220] ? __fget_light+0x2f7/0x440 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 60.270234] ? fget_raw+0x20/0x20 [ 60.273701] ? __x64_sys_futex+0x47f/0x6a0 [ 60.277947] ? do_futex+0x27d0/0x27d0 [ 60.281764] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 60.287315] ? fput+0x130/0x1a0 [ 60.290617] __x64_sys_connect+0x73/0xb0 [ 60.294692] do_syscall_64+0x1b9/0x820 [ 60.298586] ? finish_task_switch+0x1d3/0x870 [ 60.303090] ? syscall_return_slowpath+0x5e0/0x5e0 [ 60.308030] ? syscall_return_slowpath+0x31d/0x5e0 [ 60.312973] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 60.318347] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 60.323216] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 60.328427] RIP: 0033:0x445d59 [ 60.331612] Code: e8 ac e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 0d fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 60.350924] RSP: 002b:00007f7127cb9da8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 60.358644] RAX: ffffffffffffffda RBX: 00000000006dac38 RCX: 0000000000445d59 executing program executing program executing program executing program executing program executing program [ 60.365932] RDX: 0000000000000010 RSI: 0000000020000200 RDI: 0000000000000004 [ 60.373218] RBP: 00000000006dac30 R08: 0000000000000000 R09: 0000000000000000 [ 60.380497] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac3c [ 60.387774] R13: 6b636f73762d7473 R14: 6f68762f7665642f R15: 0000000000000001 [ 60.395054] [ 60.395060] ====================================================== [ 60.395065] WARNING: possible circular locking dependency detected [ 60.395069] 4.18.0-rc7+ #176 Not tainted [ 60.395075] ------------------------------------------------------ [ 60.395080] syz-executor648/12456 is trying to acquire lock: [ 60.395083] (____ptrval____) ((console_sem).lock){-...}, at: down_trylock+0x13/0x70 [ 60.395097] [ 60.395101] but task is already holding lock: [ 60.395104] (____ptrval____) (&obj_hash[i].lock){-.-.}, at: __debug_object_init+0x127/0x12e0 [ 60.395119] [ 60.395124] which lock already depends on the new lock. [ 60.395125] [ 60.395128] [ 60.395133] the existing dependency chain (in reverse order) is: [ 60.395135] [ 60.395137] -> #3 (&obj_hash[i].lock){-.-.}: [ 60.395151] _raw_spin_lock_irqsave+0x96/0xc0 [ 60.395155] __debug_object_init+0x127/0x12e0 [ 60.395159] debug_object_init+0x16/0x20 [ 60.395162] hrtimer_init+0x97/0x480 [ 60.395166] init_dl_task_timer+0x1b/0x50 [ 60.395170] __sched_fork+0x2ae/0x590 [ 60.395174] init_idle+0x75/0x7a0 [ 60.395178] sched_init+0xbf3/0xd2c [ 60.395182] start_kernel+0x47d/0x949 [ 60.395186] x86_64_start_reservations+0x29/0x2b [ 60.395190] x86_64_start_kernel+0x76/0x79 [ 60.395194] secondary_startup_64+0xa5/0xb0 [ 60.395197] [ 60.395207] -> #2 (&rq->lock){-.-.}: [ 60.395220] _raw_spin_lock+0x2a/0x40 [ 60.395224] task_fork_fair+0x93/0x680 [ 60.395228] sched_fork+0x446/0xb40 [ 60.395232] copy_process.part.39+0x1bf5/0x70b0 [ 60.395236] _do_fork+0x291/0x12a0 [ 60.395240] kernel_thread+0x34/0x40 [ 60.395244] rest_init+0x22/0xe4 [ 60.395247] start_kernel+0x90e/0x949 [ 60.395252] x86_64_start_reservations+0x29/0x2b [ 60.395256] x86_64_start_kernel+0x76/0x79 [ 60.395260] secondary_startup_64+0xa5/0xb0 [ 60.395263] [ 60.395265] -> #1 (&p->pi_lock){-.-.}: [ 60.395278] _raw_spin_lock_irqsave+0x96/0xc0 [ 60.395282] try_to_wake_up+0xd2/0x12a0 [ 60.395286] wake_up_process+0x10/0x20 [ 60.395290] __up.isra.1+0x1c0/0x2a0 [ 60.395293] up+0x13c/0x1c0 [ 60.395297] __up_console_sem+0xbe/0x1b0 [ 60.395301] console_unlock+0x7a2/0x10b0 [ 60.395305] vprintk_emit+0x6c6/0xdf0 [ 60.395309] vprintk_default+0x28/0x30 [ 60.395313] vprintk_func+0x7a/0xe7 [ 60.395316] printk+0xa7/0xcf [ 60.395319] load_umh+0x51/0xbd [ 60.395323] do_one_initcall+0x127/0x913 [ 60.395327] kernel_init_freeable+0x49b/0x58e [ 60.395331] kernel_init+0x11/0x1b3 [ 60.395334] ret_from_fork+0x3a/0x50 [ 60.395336] [ 60.395338] -> #0 ((console_sem).lock){-...}: [ 60.395352] lock_acquire+0x1e4/0x540 [ 60.395356] _raw_spin_lock_irqsave+0x96/0xc0 [ 60.395360] down_trylock+0x13/0x70 [ 60.395364] __down_trylock_console_sem+0xae/0x200 [ 60.395368] console_trylock+0x15/0xa0 [ 60.395372] vprintk_emit+0x6ad/0xdf0 [ 60.395376] vprintk_default+0x28/0x30 [ 60.395380] vprintk_func+0x7a/0xe7 [ 60.395383] printk+0xa7/0xcf [ 60.395387] __warn_printk+0x8c/0xe0 [ 60.395391] debug_print_object+0x16a/0x210 [ 60.395395] __debug_object_init+0x8e9/0x12e0 [ 60.395400] debug_object_init+0x16/0x20 [ 60.395404] init_timer_key+0xa9/0x490 [ 60.395408] vsock_stream_connect+0xc7a/0xfc0 [ 60.395412] __sys_connect+0x37d/0x4c0 [ 60.395416] __x64_sys_connect+0x73/0xb0 [ 60.395420] do_syscall_64+0x1b9/0x820 [ 60.395425] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 60.395427] [ 60.395432] other info that might help us debug this: [ 60.395434] [ 60.395437] Chain exists of: [ 60.395439] (console_sem).lock --> &rq->lock --> &obj_hash[i].lock [ 60.395457] [ 60.395461] Possible unsafe locking scenario: [ 60.395464] [ 60.395468] CPU0 CPU1 [ 60.395472] ---- ---- [ 60.395474] lock(&obj_hash[i].lock); [ 60.395484] lock(&rq->lock); [ 60.395493] lock(&obj_hash[i].lock); [ 60.395502] lock((console_sem).lock); [ 60.395509] [ 60.395512] *** DEADLOCK *** [ 60.395514] [ 60.395518] 2 locks held by syz-executor648/12456: [ 60.395520] #0: (____ptrval____) (sk_lock-AF_VSOCK){+.+.}, at: vsock_stream_connect+0x1e3/0xfc0 [ 60.395537] #1: (____ptrval____) (&obj_hash[i].lock){-.-.}, at: __debug_object_init+0x127/0x12e0 [ 60.395553] [ 60.395556] stack backtrace: [ 60.395562] CPU: 1 PID: 12456 Comm: syz-executor648 Not tainted 4.18.0-rc7+ #176 [ 60.395569] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.395572] Call Trace: [ 60.395576] dump_stack+0x1c9/0x2b4 [ 60.395580] ? dump_stack_print_info.cold.2+0x52/0x52 [ 60.395584] ? vprintk_func+0xd0/0xe7 [ 60.395589] print_circular_bug.isra.36.cold.57+0x1bd/0x27d [ 60.395593] ? save_trace+0xe0/0x290 [ 60.395597] __lock_acquire+0x3449/0x5020 [ 60.395601] ? trace_hardirqs_on+0x10/0x10 [ 60.395605] ? trace_hardirqs_on+0x10/0x10 [ 60.395609] ? lock_downgrade+0x8f0/0x8f0 [ 60.395612] ? finish_task_switch+0x18a/0x870 [ 60.395616] ? kasan_check_read+0x11/0x20 [ 60.395620] ? do_raw_spin_unlock+0xa7/0x2f0 [ 60.395625] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 60.395629] ? compat_start_thread+0x80/0x80 [ 60.395633] ? _raw_spin_unlock_irq+0x27/0x70 [ 60.395637] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 60.395641] ? trace_hardirqs_on+0xd/0x10 [ 60.395645] ? _raw_spin_unlock_irq+0x27/0x70 [ 60.395649] ? graph_lock+0x170/0x170 [ 60.395652] ? print_usage_bug+0xc0/0xc0 [ 60.395656] ? preempt_notifier_register+0x200/0x200 [ 60.395660] lock_acquire+0x1e4/0x540 [ 60.395663] ? down_trylock+0x13/0x70 [ 60.395667] ? lock_release+0xa30/0xa30 [ 60.395670] ? lock_downgrade+0x8f0/0x8f0 [ 60.395674] ? kvm_sched_clock_read+0x9/0x20 [ 60.395678] ? sched_clock+0x31/0x40 [ 60.395682] ? vprintk_emit+0x6ad/0xdf0 [ 60.395686] _raw_spin_lock_irqsave+0x96/0xc0 [ 60.395690] ? down_trylock+0x13/0x70 [ 60.395693] down_trylock+0x13/0x70 [ 60.395697] __down_trylock_console_sem+0xae/0x200 [ 60.395700] console_trylock+0x15/0xa0 [ 60.395704] vprintk_emit+0x6ad/0xdf0 [ 60.395708] ? wake_up_klogd+0x110/0x110 [ 60.395711] ? print_usage_bug+0xc0/0xc0 [ 60.395715] ? __lock_acquire+0x7fc/0x5020 [ 60.395719] ? print_usage_bug+0xc0/0xc0 [ 60.395723] ? rcu_note_context_switch+0x730/0x730 [ 60.395727] ? lock_acquire+0x1e4/0x540 [ 60.395731] ? __internal_add_timer+0x2e0/0x2e0 [ 60.395734] vprintk_default+0x28/0x30 [ 60.395737] vprintk_func+0x7a/0xe7 [ 60.395740] printk+0xa7/0xcf [ 60.395744] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 60.395747] ? lock_acquire+0x1e4/0x540 [ 60.395751] ? __warn_printk+0x80/0xe0 [ 60.395755] ? __queue_work+0x1410/0x1410 [ 60.395758] __warn_printk+0x8c/0xe0 [ 60.395761] ? test_taint+0x20/0x20 [ 60.395765] ? print_usage_bug+0xc0/0xc0 [ 60.395769] ? __queue_work+0x1410/0x1410 [ 60.395773] debug_print_object+0x16a/0x210 [ 60.395777] __debug_object_init+0x8e9/0x12e0 [ 60.395781] ? debug_object_free+0x690/0x690 [ 60.395785] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 60.395789] ? trace_hardirqs_on+0xd/0x10 [ 60.395793] ? __debug_object_init+0x581/0x12e0 [ 60.395797] ? debug_object_free+0x690/0x690 [ 60.395801] ? mark_held_locks+0xc9/0x160 [ 60.395805] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 60.395809] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 60.395813] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 60.395817] ? trace_hardirqs_on+0xd/0x10 [ 60.395821] debug_object_init+0x16/0x20 [ 60.395825] init_timer_key+0xa9/0x490 [ 60.395829] ? __queue_work+0x1410/0x1410 [ 60.395833] ? init_timer_on_stack_key+0xe0/0xe0 [ 60.395837] ? __local_bh_enable_ip+0x161/0x230 [ 60.395842] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 60.395846] ? lock_sock_nested+0x9f/0x120 [ 60.395850] ? __lockdep_init_map+0x105/0x590 [ 60.395854] vsock_stream_connect+0xc7a/0xfc0 [ 60.395858] ? vsock_dgram_connect+0x500/0x500 [ 60.395862] ? lock_downgrade+0x8f0/0x8f0 [ 60.395866] ? finish_wait+0x430/0x430 [ 60.395869] ? lock_release+0xa30/0xa30 [ 60.395873] ? check_same_owner+0x340/0x340 [ 60.395878] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 60.395882] ? _copy_from_user+0xdf/0x150 [ 60.395887] ? security_socket_connect+0x94/0xc0 [ 60.395891] __sys_connect+0x37d/0x4c0 [ 60.395894] ? do_fcntl+0x131/0x14f0 [ 60.395898] ? __ia32_sys_accept+0xb0/0xb0 [ 60.395901] ? f_getown+0xc0/0xc0 [ 60.395905] ? __fget_light+0x2f7/0x440 [ 60.395908] ? fget_raw+0x20/0x20 [ 60.395912] ? __x64_sys_futex+0x47f/0x6a0 [ 60.395916] ? do_futex+0x27d0/0x27d0 [ 60.395920] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 60.395923] ? fput+0x130/0x1a0 [ 60.395927] __x64_sys_connect+0x73/0xb0 [ 60.395931] do_syscall_64+0x1b9/0x820 [ 60.395935] ? finish_task_switch+0x1d3/0x870 [ 60.395939] ? syscall_return_slowpath+0x5e0/0x5e0 [ 60.395943] ? syscall_return_slowpath+0x31d/0x5e0 [ 60.395948] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 60.395952] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 60.395956] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 60.395960] RIP: 0033:0x445d59 [ 60.395962] Code: e8 ac e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 0d fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 60.396103] RSP: 002b:00007f7127cb9da8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 60.396113] RAX: ffffffffffffffda RBX: 00000000006dac38 RCX: 0000000000445d59 [ 60.396118] RDX: 0000000000000010 RSI: 0000000020000200 RDI: 0000000000000004 [ 60.396124] RBP: 00000000006dac30 R08: 0000000000000000 R09: 0000000000000000 [ 60.396130] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac3c [ 60.396136] R13: 6b636f73762d7473 R14: 6f68762f7665642f R15: 0000000000000001 [ 60.396478] Dumping ftrace buffer: [ 61.345475] (ftrace buffer empty) [ 61.349163] Kernel Offset: disabled [ 61.352769] Rebooting in 86400 seconds..