[ 67.202670][ T27] audit: type=1800 audit(1565865685.564:27): pid=10024 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 67.225691][ T27] audit: type=1800 audit(1565865685.564:28): pid=10024 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 68.051937][ T27] audit: type=1800 audit(1565865686.484:29): pid=10024 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 68.075478][ T27] audit: type=1800 audit(1565865686.484:30): pid=10024 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.176' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 575.946319][ T1057] INFO: task syz-executor153:10198 blocked for more than 143 seconds. [ 575.954483][ T1057] Not tainted 5.3.0-rc3+ #162 [ 575.959688][ T1057] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 575.968355][ T1057] syz-executor153 D27672 10198 10179 0x80000002 [ 575.974662][ T1057] Call Trace: [ 575.978025][ T1057] __schedule+0x755/0x1580 [ 575.982431][ T1057] ? __sched_text_start+0x8/0x8 [ 575.987288][ T1057] ? stack_trace_save+0xac/0xe0 [ 575.992126][ T1057] ? stack_trace_consume_entry+0x190/0x190 [ 575.997950][ T1057] schedule+0xa8/0x270 [ 576.002006][ T1057] schedule_timeout+0x717/0xc50 [ 576.006860][ T1057] ? usleep_range+0x170/0x170 [ 576.011520][ T1057] ? __kasan_check_write+0x14/0x20 [ 576.016639][ T1057] ? lock_downgrade+0x920/0x920 [ 576.021553][ T1057] ? rwlock_bug.part.0+0x90/0x90 [ 576.026530][ T1057] ? wait_for_completion+0x9e/0x440 [ 576.031728][ T1057] ? trace_hardirqs_on+0x67/0x240 [ 576.036764][ T1057] ? __kasan_check_read+0x11/0x20 [ 576.041777][ T1057] wait_for_completion+0x29c/0x440 [ 576.046917][ T1057] ? wait_for_completion_interruptible+0x470/0x470 [ 576.053398][ T1057] ? wake_up_q+0xf0/0xf0 [ 576.057654][ T1057] ? quarantine_put+0x11c/0x1c0 [ 576.062584][ T1057] tls_sw_release_resources_tx+0x4ee/0x6b0 [ 576.068455][ T1057] tls_sk_proto_close+0x686/0x970 [ 576.073465][ T1057] ? wait_on_pending_writer+0x420/0x420 [ 576.079091][ T1057] ? ip_mc_drop_socket+0x211/0x270 [ 576.084200][ T1057] ? down_write+0xdf/0x150 [ 576.088648][ T1057] inet_release+0xed/0x200 [ 576.093061][ T1057] inet6_release+0x53/0x80 [ 576.097506][ T1057] __sock_release+0xce/0x280 [ 576.102084][ T1057] sock_close+0x1e/0x30 [ 576.106285][ T1057] __fput+0x2ff/0x890 [ 576.110247][ T1057] ? __sock_release+0x280/0x280 [ 576.115084][ T1057] ____fput+0x16/0x20 [ 576.119069][ T1057] task_work_run+0x145/0x1c0 [ 576.123638][ T1057] do_exit+0x92f/0x2e50 [ 576.127798][ T1057] ? mm_update_next_owner+0x640/0x640 [ 576.133161][ T1057] ? down_read_non_owner+0x450/0x450 [ 576.138452][ T1057] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 576.144670][ T1057] ? handle_mm_fault+0x1d3/0x6b0 [ 576.149659][ T1057] do_group_exit+0x135/0x360 [ 576.154229][ T1057] __x64_sys_exit_group+0x44/0x50 [ 576.159259][ T1057] do_syscall_64+0xfd/0x6a0 [ 576.163742][ T1057] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 576.169640][ T1057] RIP: 0033:0x43ff88 [ 576.173516][ T1057] Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00 [ 576.193173][ T1057] RSP: 002b:00007ffd1c2d0f78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 576.201586][ T1057] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ff88 [ 576.209579][ T1057] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 576.217556][ T1057] RBP: 00000000004bf890 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 576.225499][ T1057] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 576.233467][ T1057] R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000 [ 576.241449][ T1057] INFO: lockdep is turned off. [ 576.246217][ T1057] NMI backtrace for cpu 0 [ 576.250521][ T1057] CPU: 0 PID: 1057 Comm: khungtaskd Not tainted 5.3.0-rc3+ #162 [ 576.258113][ T1057] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 576.268139][ T1057] Call Trace: [ 576.271493][ T1057] dump_stack+0x172/0x1f0 [ 576.275806][ T1057] nmi_cpu_backtrace.cold+0x70/0xb2 [ 576.280979][ T1057] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 576.287194][ T1057] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 576.292798][ T1057] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 576.298750][ T1057] arch_trigger_cpumask_backtrace+0x14/0x20 [ 576.304614][ T1057] watchdog+0x9d0/0xef0 [ 576.308753][ T1057] kthread+0x361/0x430 [ 576.312800][ T1057] ? reset_hung_task_detector+0x30/0x30 [ 576.318326][ T1057] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 576.324543][ T1057] ret_from_fork+0x24/0x30 [ 576.328998][ T1057] Sending NMI from CPU 0 to CPUs 1: [ 576.334230][ C1] NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xe/0x10 [ 576.335181][ T1057] Kernel panic - not syncing: hung_task: blocked tasks [ 576.349313][ T1057] CPU: 0 PID: 1057 Comm: khungtaskd Not tainted 5.3.0-rc3+ #162 [ 576.356909][ T1057] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 576.366943][ T1057] Call Trace: [ 576.370214][ T1057] dump_stack+0x172/0x1f0 [ 576.374542][ T1057] panic+0x2dc/0x755 [ 576.378417][ T1057] ? add_taint.cold+0x16/0x16 [ 576.383595][ T1057] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 576.389297][ T1057] ? printk_safe_flush+0xf2/0x140 [ 576.394332][ T1057] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 576.400680][ T1057] ? nmi_trigger_cpumask_backtrace+0x224/0x28b [ 576.406820][ T1057] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 576.412948][ T1057] watchdog+0x9e1/0xef0 [ 576.417077][ T1057] kthread+0x361/0x430 [ 576.421118][ T1057] ? reset_hung_task_detector+0x30/0x30 [ 576.426638][ T1057] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 576.432851][ T1057] ret_from_fork+0x24/0x30 [ 576.438268][ T1057] Kernel Offset: disabled [ 576.442584][ T1057] Rebooting in 86400 seconds..