[info] Using makefile-style concurrent boot in runlevel 2. [ 59.793215][ T26] audit: type=1800 audit(1555037800.953:21): pid=9040 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [ 59.825975][ T26] audit: type=1800 audit(1555037800.953:22): pid=9040 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.31' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 487.699285][ T1043] INFO: task syz-executor183:9191 blocked for more than 143 seconds. [ 487.707434][ T1043] Not tainted 5.1.0-rc4-next-20190411 #23 [ 487.713712][ T1043] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 487.722413][ T1043] syz-executor183 D27768 9191 9189 0x80000002 [ 487.728795][ T1043] Call Trace: [ 487.732452][ T1043] __schedule+0x817/0x1cc0 [ 487.736881][ T1043] ? retint_kernel+0x2d/0x2d [ 487.741560][ T1043] ? __sched_text_start+0x8/0x8 [ 487.746417][ T1043] ? __mutex_lock+0x527/0x1310 [ 487.751345][ T1043] schedule+0x92/0x180 [ 487.755420][ T1043] schedule_preempt_disabled+0x13/0x20 [ 487.760915][ T1043] __mutex_lock+0x726/0x1310 [ 487.765580][ T1043] ? snd_seq_kernel_client_ctl+0xe5/0x170 [ 487.771445][ T1043] ? mutex_trylock+0x1e0/0x1e0 [ 487.776266][ T1043] ? snd_seq_oss_release+0xf5/0x150 [ 487.781561][ T1043] ? odev_release+0x54/0x80 [ 487.786213][ T1043] ? __fput+0x2e5/0x8d0 [ 487.790481][ T1043] ? task_work_run+0x14a/0x1c0 [ 487.795291][ T1043] ? do_exit+0x90a/0x2fa0 [ 487.799648][ T1043] ? do_group_exit+0x135/0x370 [ 487.804453][ T1043] ? __x64_sys_exit_group+0x44/0x50 [ 487.809728][ T1043] ? do_syscall_64+0x103/0x610 [ 487.814585][ T1043] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 487.820745][ T1043] ? kasan_check_write+0x14/0x20 [ 487.825792][ T1043] ? do_raw_spin_lock+0x12a/0x2e0 [ 487.830898][ T1043] mutex_lock_nested+0x16/0x20 [ 487.835758][ T1043] ? mutex_lock_nested+0x16/0x20 [ 487.840846][ T1043] snd_seq_kernel_client_ctl+0xe5/0x170 [ 487.846428][ T1043] snd_seq_oss_writeq_clear+0xe0/0x140 [ 487.851983][ T1043] ? snd_seq_oss_writeq_wakeup+0xc0/0xc0 [ 487.857626][ T1043] ? snd_seq_oss_timer_delete+0x5a/0x80 [ 487.863224][ T1043] ? create_port+0x250/0x250 [ 487.867821][ T1043] snd_seq_oss_writeq_delete+0x20/0x40 [ 487.873310][ T1043] free_devinfo+0x66/0xc0 [ 487.877648][ T1043] port_delete+0xe8/0x1c0 [ 487.882004][ T1043] snd_seq_delete_port+0x266/0x330 [ 487.887117][ T1043] snd_seq_ioctl_delete_port+0xba/0x190 [ 487.892728][ T1043] snd_seq_kernel_client_ctl+0x112/0x170 [ 487.898366][ T1043] ? snd_seq_info_done+0x30/0x30 [ 487.903402][ T1043] snd_seq_event_port_detach+0xba/0x100 [ 487.908959][ T1043] ? snd_seq_event_port_attach+0x220/0x220 [ 487.914815][ T1043] ? kasan_check_write+0x14/0x20 [ 487.919863][ T1043] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 487.925579][ T1043] delete_port+0x87/0xd0 [ 487.929853][ T1043] snd_seq_oss_release+0xf5/0x150 [ 487.934879][ T1043] odev_release+0x54/0x80 [ 487.939247][ T1043] __fput+0x2e5/0x8d0 [ 487.943287][ T1043] ____fput+0x16/0x20 [ 487.947302][ T1043] task_work_run+0x14a/0x1c0 [ 487.951923][ T1043] do_exit+0x90a/0x2fa0 [ 487.956140][ T1043] ? putname+0xef/0x130 [ 487.960340][ T1043] ? mm_update_next_owner+0x640/0x640 [ 487.965750][ T1043] ? do_sys_open+0x31d/0x5d0 [ 487.970443][ T1043] ? filp_open+0x80/0x80 [ 487.974731][ T1043] ? up_read+0x1e/0x180 [ 487.978876][ T1043] do_group_exit+0x135/0x370 [ 487.983502][ T1043] __x64_sys_exit_group+0x44/0x50 [ 487.988681][ T1043] do_syscall_64+0x103/0x610 [ 487.993319][ T1043] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 487.999342][ T1043] RIP: 0033:0x43ed98 [ 488.003235][ T1043] Code: Bad RIP value. [ 488.007286][ T1043] RSP: 002b:00007fff5070eda8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 488.015778][ T1043] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed98 [ 488.023845][ T1043] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 488.031901][ T1043] RBP: 00000000004be5a8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 488.040075][ T1043] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 488.048035][ T1043] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 488.056068][ T1043] INFO: lockdep is turned off. [ 488.060856][ T1043] NMI backtrace for cpu 1 [ 488.065211][ T1043] CPU: 1 PID: 1043 Comm: khungtaskd Not tainted 5.1.0-rc4-next-20190411 #23 [ 488.073876][ T1043] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 488.084783][ T1043] Call Trace: [ 488.088217][ T1043] dump_stack+0x172/0x1f0 [ 488.092587][ T1043] nmi_cpu_backtrace.cold+0x63/0xa4 [ 488.097822][ T1043] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 488.103461][ T1043] nmi_trigger_cpumask_backtrace+0x1be/0x236 [ 488.109428][ T1043] arch_trigger_cpumask_backtrace+0x14/0x20 [ 488.115315][ T1043] watchdog+0x9b7/0xec0 [ 488.119549][ T1043] kthread+0x357/0x430 [ 488.123599][ T1043] ? reset_hung_task_detector+0x30/0x30 [ 488.129166][ T1043] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 488.135404][ T1043] ret_from_fork+0x3a/0x50 [ 488.139947][ T1043] Sending NMI from CPU 1 to CPUs 0: [ 488.145210][ C0] NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x2/0x10 [ 488.146161][ T1043] Kernel panic - not syncing: hung_task: blocked tasks [ 488.160447][ T1043] CPU: 1 PID: 1043 Comm: khungtaskd Not tainted 5.1.0-rc4-next-20190411 #23 [ 488.169276][ T1043] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 488.179453][ T1043] Call Trace: [ 488.182736][ T1043] dump_stack+0x172/0x1f0 [ 488.187090][ T1043] panic+0x2cb/0x72b [ 488.190974][ T1043] ? __warn_printk+0xf3/0xf3 [ 488.195546][ T1043] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 488.201316][ T1043] ? printk_safe_flush+0xf2/0x140 [ 488.206636][ T1043] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 488.212860][ T1043] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 488.218882][ T1043] ? nmi_trigger_cpumask_backtrace+0x1a7/0x236 [ 488.225178][ T1043] ? nmi_trigger_cpumask_backtrace+0x19e/0x236 [ 488.231360][ T1043] watchdog+0x9c8/0xec0 [ 488.235519][ T1043] kthread+0x357/0x430 [ 488.239570][ T1043] ? reset_hung_task_detector+0x30/0x30 [ 488.245112][ T1043] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 488.251347][ T1043] ret_from_fork+0x3a/0x50 [ 488.256594][ T1043] Kernel Offset: disabled [ 488.260921][ T1043] Rebooting in 86400 seconds..