[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] startpar: service(s) returned failure: rsyslog ...[?25l[?1c7[FAIL8[?25h[?0c failed! Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 48.249146][ T26] kauditd_printk_skb: 4 callbacks suppressed [ 48.249181][ T26] audit: type=1400 audit(1554348070.636:35): avc: denied { map } for pid=8099 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.10.16' (ECDSA) to the list of known hosts. executing program [ 298.411819][ T26] audit: type=1400 audit(1554348320.796:36): avc: denied { map } for pid=8111 comm="syz-executor044" path="/root/syz-executor044268029" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 447.891814][ T1041] INFO: task syz-executor044:8111 blocked for more than 143 seconds. [ 447.900133][ T1041] Not tainted 5.1.0-rc3+ #50 [ 447.905373][ T1041] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 447.914121][ T1041] syz-executor044 D27832 8111 8109 0x80000000 [ 447.920504][ T1041] Call Trace: [ 447.924083][ T1041] __schedule+0x817/0x1cc0 [ 447.928539][ T1041] ? __sched_text_start+0x8/0x8 [ 447.933554][ T1041] ? __lock_acquire+0x242a/0x3fb0 [ 447.938670][ T1041] schedule+0x92/0x180 [ 447.942855][ T1041] schedule_timeout+0x8ca/0xfd0 [ 447.947714][ T1041] ? wait_for_completion+0x294/0x440 [ 447.953126][ T1041] ? find_held_lock+0x35/0x130 [ 447.957903][ T1041] ? usleep_range+0x170/0x170 [ 447.962733][ T1041] ? kasan_check_write+0x14/0x20 [ 447.967872][ T1041] ? _raw_spin_unlock_irq+0x28/0x90 [ 447.973182][ T1041] ? wait_for_completion+0x294/0x440 [ 447.978471][ T1041] ? _raw_spin_unlock_irq+0x28/0x90 [ 447.983744][ T1041] ? lockdep_hardirqs_on+0x418/0x5d0 [ 447.989149][ T1041] ? trace_hardirqs_on+0x67/0x230 [ 447.994340][ T1041] ? kasan_check_read+0x11/0x20 [ 447.999229][ T1041] wait_for_completion+0x29c/0x440 [ 448.004536][ T1041] ? lockdep_hardirqs_on+0x418/0x5d0 [ 448.009905][ T1041] ? wait_for_completion_interruptible+0x4b0/0x4b0 [ 448.016608][ T1041] ? wake_up_q+0xf0/0xf0 [ 448.020907][ T1041] ? percpu_ref_kill_and_confirm+0x1b7/0x3b0 [ 448.027082][ T1041] exit_aio+0x321/0x3a0 [ 448.031262][ T1041] ? aio_poll_wake+0x11e0/0x11e0 [ 448.036282][ T1041] ? mutex_unlock+0xd/0x10 [ 448.040763][ T1041] mmput+0xcf/0x4c0 [ 448.044769][ T1041] do_exit+0x816/0x2fa0 [ 448.048938][ T1041] ? lock_downgrade+0x880/0x880 [ 448.053928][ T1041] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 448.060217][ T1041] ? kasan_check_read+0x11/0x20 [ 448.065324][ T1041] ? mm_update_next_owner+0x640/0x640 [ 448.070700][ T1041] ? __x64_sys_io_submit+0x37d/0x580 [ 448.076035][ T1041] ? __ia32_sys_io_destroy+0x420/0x420 [ 448.081543][ T1041] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 448.087170][ T1041] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 448.092665][ T1041] do_group_exit+0x135/0x370 [ 448.097248][ T1041] __x64_sys_exit_group+0x44/0x50 [ 448.102379][ T1041] do_syscall_64+0x103/0x610 [ 448.107019][ T1041] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 448.113002][ T1041] RIP: 0033:0x43eea8 [ 448.116904][ T1041] Code: d1 83 c1 30 42 88 0c 06 4c 63 c0 42 c6 04 06 00 c3 90 0f b6 57 09 41 b8 14 00 00 00 b8 14 00 00 00 b9 13 00 00 00 41 bb 13 00 <00> 00 80 fa 5a 0f 85 da fe ff ff c6 04 0e 5a 42 c6 04 06 00 5b c3 [ 448.136570][ T1041] RSP: 002b:00007ffd0ce17778 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 448.145039][ T1041] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043eea8 [ 448.153085][ T1041] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 448.161059][ T1041] RBP: 00000000004be6a8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 448.169457][ T1041] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 448.177514][ T1041] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 448.185578][ T1041] [ 448.185578][ T1041] Showing all locks held in the system: [ 448.193344][ T1041] 1 lock held by khungtaskd/1041: [ 448.198344][ T1041] #0: 00000000d51b25f0 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e [ 448.207756][ T1041] 1 lock held by rsyslogd/7943: [ 448.212645][ T1041] #0: 00000000ea0966d8 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 448.221321][ T1041] 2 locks held by getty/8086: [ 448.226049][ T1041] #0: 0000000088791187 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 448.235059][ T1041] #1: 00000000ea7749c9 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 448.244889][ T1041] 2 locks held by getty/8087: [ 448.249562][ T1041] #0: 0000000073cfc899 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 448.258581][ T1041] #1: 0000000034b878b6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 448.268189][ T1041] 2 locks held by getty/8088: [ 448.272966][ T1041] #0: 00000000e976b007 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 448.281964][ T1041] #1: 00000000d5e2e4de (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 448.291508][ T1041] 2 locks held by getty/8089: [ 448.296245][ T1041] #0: 000000009a5e5edb (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 448.305239][ T1041] #1: 00000000daa2b022 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 448.314984][ T1041] 2 locks held by getty/8090: [ 448.319648][ T1041] #0: 000000005ccbf4aa (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 448.328664][ T1041] #1: 000000000e0ad766 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 448.338289][ T1041] 2 locks held by getty/8091: [ 448.343004][ T1041] #0: 00000000c09fd0f4 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 448.352352][ T1041] #1: 00000000d1fd451b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 448.362028][ T1041] 2 locks held by getty/8092: [ 448.366748][ T1041] #0: 00000000927eda83 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 448.376027][ T1041] #1: 00000000f4a5515a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 448.385766][ T1041] [ 448.388083][ T1041] ============================================= [ 448.388083][ T1041] [ 448.396544][ T1041] NMI backtrace for cpu 1 [ 448.400930][ T1041] CPU: 1 PID: 1041 Comm: khungtaskd Not tainted 5.1.0-rc3+ #50 [ 448.408447][ T1041] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 448.418484][ T1041] Call Trace: [ 448.422027][ T1041] dump_stack+0x172/0x1f0 [ 448.426342][ T1041] nmi_cpu_backtrace.cold+0x63/0xa4 [ 448.431659][ T1041] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 448.437280][ T1041] nmi_trigger_cpumask_backtrace+0x1be/0x236 [ 448.443448][ T1041] arch_trigger_cpumask_backtrace+0x14/0x20 [ 448.449330][ T1041] watchdog+0x9b7/0xec0 [ 448.453526][ T1041] kthread+0x357/0x430 [ 448.457623][ T1041] ? reset_hung_task_detector+0x30/0x30 [ 448.466388][ T1041] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 448.472622][ T1041] ret_from_fork+0x3a/0x50 [ 448.477163][ T1041] Sending NMI from CPU 1 to CPUs 0: [ 448.482506][ C0] NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x2/0x10 [ 448.483431][ T1041] Kernel panic - not syncing: hung_task: blocked tasks [ 448.497589][ T1041] CPU: 1 PID: 1041 Comm: khungtaskd Not tainted 5.1.0-rc3+ #50 [ 448.505149][ T1041] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 448.515290][ T1041] Call Trace: [ 448.518574][ T1041] dump_stack+0x172/0x1f0 [ 448.522956][ T1041] panic+0x2cb/0x65c [ 448.526886][ T1041] ? __warn_printk+0xf3/0xf3 [ 448.531507][ T1041] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 448.537269][ T1041] ? printk_safe_flush+0xf2/0x140 [ 448.542283][ T1041] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 448.548512][ T1041] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 448.554191][ T1041] ? nmi_trigger_cpumask_backtrace+0x1a7/0x236 [ 448.560327][ T1041] ? nmi_trigger_cpumask_backtrace+0x19e/0x236 [ 448.566472][ T1041] watchdog+0x9c8/0xec0 [ 448.570626][ T1041] kthread+0x357/0x430 [ 448.574678][ T1041] ? reset_hung_task_detector+0x30/0x30 [ 448.580210][ T1041] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 448.586436][ T1041] ret_from_fork+0x3a/0x50 [ 448.591684][ T1041] Kernel Offset: disabled [ 448.596043][ T1041] Rebooting in 86400 seconds..