[ 37.349024][ T26] audit: type=1800 audit(1555408975.180:26): pid=7545 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 37.370045][ T26] audit: type=1800 audit(1555408975.190:27): pid=7545 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 37.405404][ T26] audit: type=1800 audit(1555408975.260:28): pid=7545 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. [ 38.407714][ T26] audit: type=1800 audit(1555408976.260:29): pid=7545 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 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.5' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 504.958082][ T1042] INFO: task syz-executor575:7721 blocked for more than 143 seconds. [ 504.966508][ T1042] Not tainted 5.1.0-rc4+ #139 [ 504.971932][ T1042] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 504.980662][ T1042] syz-executor575 D28096 7721 7697 0x00000004 [ 504.987098][ T1042] Call Trace: [ 504.990605][ T1042] __schedule+0x817/0x1cc0 [ 504.995102][ T1042] ? trace_hardirqs_on+0x67/0x230 [ 505.000305][ T1042] ? kasan_check_read+0x11/0x20 [ 505.005179][ T1042] ? __sched_text_start+0x8/0x8 [ 505.010210][ T1042] ? __lock_acquire+0x548/0x3fb0 [ 505.015283][ T1042] ? finish_task_switch+0x1f0/0x780 [ 505.020616][ T1042] ? __switch_to_asm+0x40/0x70 [ 505.025395][ T1042] schedule+0x92/0x180 [ 505.029543][ T1042] schedule_timeout+0x8ca/0xfd0 [ 505.034414][ T1042] ? wait_for_completion+0x294/0x440 [ 505.039884][ T1042] ? find_held_lock+0x35/0x130 [ 505.044713][ T1042] ? usleep_range+0x170/0x170 [ 505.049839][ T1042] ? mark_held_locks+0xa4/0xf0 [ 505.054732][ T1042] ? _raw_spin_unlock_irq+0x28/0x90 [ 505.060045][ T1042] ? wait_for_completion+0x294/0x440 [ 505.065402][ T1042] ? _raw_spin_unlock_irq+0x28/0x90 [ 505.070688][ T1042] ? lockdep_hardirqs_on+0x418/0x5d0 [ 505.076027][ T1042] ? trace_hardirqs_on+0x67/0x230 [ 505.081180][ T1042] ? kasan_check_read+0x11/0x20 [ 505.086049][ T1042] wait_for_completion+0x29c/0x440 [ 505.091289][ T1042] ? wait_for_completion_interruptible+0x4b0/0x4b0 [ 505.097975][ T1042] ? wake_up_q+0xf0/0xf0 [ 505.102384][ T1042] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 505.108795][ T1042] ? pcrypt_aead_encrypt+0x372/0x470 [ 505.114439][ T1042] aead_recvmsg+0x1492/0x1ab0 [ 505.119403][ T1042] ? aead_release+0x50/0x50 [ 505.124029][ T1042] ? apparmor_socket_recvmsg+0x2a/0x30 [ 505.129669][ T1042] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 505.136021][ T1042] ? security_socket_recvmsg+0x9b/0xd0 [ 505.141628][ T1042] ? aead_release+0x50/0x50 [ 505.146249][ T1042] sock_recvmsg+0xd0/0x110 [ 505.150748][ T1042] sock_read_iter+0x299/0x3b0 [ 505.155640][ T1042] ? sock_recvmsg+0x110/0x110 [ 505.160493][ T1042] ? fsnotify+0xbc0/0xbc0 [ 505.165053][ T1042] do_iter_readv_writev+0x700/0x8e0 [ 505.170660][ T1042] ? vfs_dedupe_file_range+0x780/0x780 [ 505.176463][ T1042] ? rw_verify_area+0x118/0x360 [ 505.181496][ T1042] do_iter_read+0x27c/0x660 [ 505.186142][ T1042] ? dup_iter+0x260/0x260 [ 505.190557][ T1042] ? lock_downgrade+0x880/0x880 [ 505.195573][ T1042] vfs_readv+0xf0/0x160 [ 505.200036][ T1042] ? compat_rw_copy_check_uvector+0x3f0/0x3f0 [ 505.206463][ T1042] ? __sys_sendmmsg+0x3ac/0x4d0 [ 505.211479][ T1042] ? __fd_install+0x200/0x640 [ 505.216234][ T1042] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 505.222767][ T1042] ? __fget_light+0x1a9/0x230 [ 505.227456][ T1042] do_readv+0x15e/0x370 [ 505.231778][ T1042] ? vfs_readv+0x160/0x160 [ 505.236243][ T1042] ? do_syscall_64+0x26/0x610 [ 505.241114][ T1042] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 505.247319][ T1042] ? do_syscall_64+0x26/0x610 [ 505.252107][ T1042] __x64_sys_readv+0x75/0xb0 [ 505.256715][ T1042] do_syscall_64+0x103/0x610 [ 505.261447][ T1042] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 505.267359][ T1042] RIP: 0033:0x441349 [ 505.271835][ T1042] Code: Bad RIP value. [ 505.276085][ T1042] RSP: 002b:00007ffc363867e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 [ 505.284613][ T1042] RAX: ffffffffffffffda RBX: 00000000004a23d8 RCX: 0000000000441349 [ 505.292790][ T1042] RDX: 0000000000000001 RSI: 00000000200007c0 RDI: 0000000000000004 [ 505.300851][ T1042] RBP: 000000000005805c R08: 00000000004002c8 R09: 00000000004002c8 [ 505.308991][ T1042] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402170 [ 505.317040][ T1042] R13: 0000000000402200 R14: 0000000000000000 R15: 0000000000000000 [ 505.325312][ T1042] [ 505.325312][ T1042] Showing all locks held in the system: [ 505.333409][ T1042] 1 lock held by khungtaskd/1042: [ 505.338492][ T1042] #0: 000000006b31b694 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e [ 505.347950][ T1042] 1 lock held by rsyslogd/7584: [ 505.352791][ T1042] #0: 00000000d68df7ec (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 505.361590][ T1042] 2 locks held by getty/7673: [ 505.366269][ T1042] #0: 000000004be9d44d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 505.375335][ T1042] #1: 0000000063f3d141 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 505.385264][ T1042] 2 locks held by getty/7674: [ 505.389989][ T1042] #0: 0000000011a4c765 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 505.399003][ T1042] #1: 000000005aa22f34 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 505.408635][ T1042] 2 locks held by getty/7675: [ 505.413499][ T1042] #0: 0000000084049795 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 505.422538][ T1042] #1: 000000000fb8c9d5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 505.432313][ T1042] 2 locks held by getty/7676: [ 505.436982][ T1042] #0: 00000000b1c07397 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 505.446125][ T1042] #1: 00000000a73dc40e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 505.455790][ T1042] 2 locks held by getty/7677: [ 505.460574][ T1042] #0: 0000000017d23645 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 505.469601][ T1042] #1: 000000005e2e69d7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 505.479268][ T1042] 2 locks held by getty/7678: [ 505.484026][ T1042] #0: 000000009864ac6e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 505.493093][ T1042] #1: 000000007ce6afd3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 505.502947][ T1042] 2 locks held by getty/7679: [ 505.507736][ T1042] #0: 00000000d6aa2397 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 505.517145][ T1042] #1: 00000000b88d8d41 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 505.527138][ T1042] 1 lock held by syz-executor575/7721: [ 505.532659][ T1042] #0: 00000000d2abd3bf (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x215/0x540 [ 505.542225][ T1042] [ 505.544553][ T1042] ============================================= [ 505.544553][ T1042] [ 505.553104][ T1042] NMI backtrace for cpu 0 [ 505.557445][ T1042] CPU: 0 PID: 1042 Comm: khungtaskd Not tainted 5.1.0-rc4+ #139 [ 505.565060][ T1042] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 505.575121][ T1042] Call Trace: [ 505.578406][ T1042] dump_stack+0x172/0x1f0 [ 505.582722][ T1042] nmi_cpu_backtrace.cold+0x63/0xa4 [ 505.588039][ T1042] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 505.593697][ T1042] nmi_trigger_cpumask_backtrace+0x1be/0x236 [ 505.599782][ T1042] arch_trigger_cpumask_backtrace+0x14/0x20 [ 505.605839][ T1042] watchdog+0x9b7/0xec0 [ 505.610040][ T1042] kthread+0x357/0x430 [ 505.614170][ T1042] ? reset_hung_task_detector+0x30/0x30 [ 505.619807][ T1042] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 505.626097][ T1042] ret_from_fork+0x3a/0x50 [ 505.630638][ T1042] Sending NMI from CPU 0 to CPUs 1: [ 505.635986][ C1] NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0x2/0x10 [ 505.636902][ T1042] Kernel panic - not syncing: hung_task: blocked tasks [ 505.651292][ T1042] CPU: 0 PID: 1042 Comm: khungtaskd Not tainted 5.1.0-rc4+ #139 [ 505.658918][ T1042] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 505.669109][ T1042] Call Trace: [ 505.672400][ T1042] dump_stack+0x172/0x1f0 [ 505.676837][ T1042] panic+0x2cb/0x65c [ 505.680732][ T1042] ? __warn_printk+0xf3/0xf3 [ 505.685325][ T1042] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 505.691106][ T1042] ? printk_safe_flush+0xf2/0x140 [ 505.696222][ T1042] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 505.702469][ T1042] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 505.708107][ T1042] ? nmi_trigger_cpumask_backtrace+0x1a7/0x236 [ 505.714316][ T1042] ? nmi_trigger_cpumask_backtrace+0x19e/0x236 [ 505.720468][ T1042] watchdog+0x9c8/0xec0 [ 505.724742][ T1042] kthread+0x357/0x430 [ 505.728819][ T1042] ? reset_hung_task_detector+0x30/0x30 [ 505.734357][ T1042] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 505.740718][ T1042] ret_from_fork+0x3a/0x50 [ 505.746292][ T1042] Kernel Offset: disabled [ 505.750632][ T1042] Rebooting in 86400 seconds..