[....] Starting enhanced syslogd: rsyslogd[ 12.346439] audit: type=1400 audit(1512749451.245:5): avc: denied { syslog } for pid=2992 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] 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. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.471394] audit: type=1400 audit(1512749459.370:6): avc: denied { map } for pid=3133 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 'ci-upstream-mmots-kasan-gce-3,10.128.0.52' (ECDSA) to the list of known hosts. executing program executing program [ 117.625735] audit: type=1400 audit(1512749556.524:7): avc: denied { map } for pid=3150 comm="syzkaller265413" path="/root/syzkaller265413443" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program [ 246.751144] INFO: task syzkaller265413:3189 blocked for more than 120 seconds. [ 246.758609] Not tainted 4.15.0-rc2-mm1+ #39 [ 246.763485] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 246.771466] syzkaller265413 D24320 3189 3150 0x80000000 [ 246.777126] Call Trace: [ 246.779725] __schedule+0x8eb/0x2060 [ 246.783469] ? __sched_text_start+0x8/0x8 [ 246.787638] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 246.792857] ? trace_hardirqs_off+0xd/0x10 [ 246.797108] ? __call_rcu.constprop.71+0x45d/0xdf0 [ 246.802063] ? rcu_process_callbacks+0x17d0/0x17d0 [ 246.807004] ? check_noncircular+0x20/0x20 [ 246.811287] ? check_noncircular+0x20/0x20 [ 246.815541] ? check_noncircular+0x20/0x20 [ 246.819794] schedule+0xf5/0x430 [ 246.823179] ? __schedule+0x2060/0x2060 [ 246.827168] ? lock_release+0xda0/0xda0 [ 246.831164] ? find_held_lock+0x39/0x1d0 [ 246.835249] schedule_timeout+0x43a/0x560 [ 246.839419] ? wait_for_completion+0xd3/0x7b0 [ 246.843924] ? exit_aio+0x47f/0x530 [ 246.847566] ? usleep_range+0x190/0x190 [ 246.851552] ? lock_release+0xda0/0xda0 [ 246.855544] ? lock_release+0xda0/0xda0 [ 246.859527] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 246.865432] ? do_raw_spin_trylock+0x190/0x190 [ 246.870048] ? _raw_spin_unlock_irq+0x27/0x70 [ 246.874561] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 246.879597] wait_for_completion+0x44b/0x7b0 [ 246.884043] ? wait_for_completion_interruptible+0x830/0x830 [ 246.889866] ? _raw_spin_unlock+0x22/0x30 [ 246.894054] ? kill_ioctx+0x239/0x340 [ 246.897874] ? wake_up_q+0xe0/0xe0 [ 246.901434] ? __lockdep_init_map+0xe4/0x650 [ 246.905853] exit_aio+0x47f/0x530 [ 246.909323] ? do_io_submit+0x14f0/0x14f0 [ 246.913476] ? find_held_lock+0x39/0x1d0 [ 246.917558] ? check_noncircular+0x20/0x20 [ 246.921827] ? exit_aio+0x47f/0x530 [ 246.925476] ? __might_sleep+0x95/0x190 [ 246.929465] mmput+0x1b1/0x6c0 [ 246.932677] ? get_task_exe_file+0xc0/0xc0 [ 246.936919] ? lock_downgrade+0x980/0x980 [ 246.941087] ? is_current_pgrp_orphaned+0xa0/0xa0 [ 246.945938] ? do_exit+0x8a1/0x1ae0 [ 246.949588] ? rcu_note_context_switch+0x710/0x710 [ 246.954538] ? lock_release+0xda0/0xda0 [ 246.958533] ? __might_sleep+0x95/0x190 [ 246.962523] ? do_raw_spin_trylock+0x190/0x190 [ 246.967130] ? __down_interruptible+0x6b0/0x6b0 [ 246.971814] ? trace_hardirqs_on+0xd/0x10 [ 246.975984] ? _raw_spin_unlock_irq+0x27/0x70 [ 246.980503] do_exit+0x90a/0x1ae0 [ 246.983988] ? aead_bind+0x11b/0x140 [ 246.987725] ? mm_update_next_owner+0x930/0x930 [ 246.992427] ? kasan_slab_free+0x71/0xc0 [ 246.996502] ? kfree+0xca/0x250 [ 246.999803] ? aead_bind+0x11b/0x140 [ 247.003535] ? alg_bind+0x1ab/0x440 [ 247.007189] ? SYSC_bind+0x1b4/0x3f0 [ 247.010912] ? SyS_bind+0x24/0x30 [ 247.014384] ? entry_SYSCALL_64_fastpath+0x1f/0x96 [ 247.019324] ? kfree+0xe4/0x250 [ 247.022624] ? crypto_larval_destroy+0x110/0x150 [ 247.027408] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 247.032451] ? trace_hardirqs_on+0xd/0x10 [ 247.036622] ? crypto_alg_lookup+0x50/0x50 [ 247.040881] ? crypto_larval_destroy+0x110/0x150 [ 247.045659] ? crypto_alg_lookup+0x50/0x50 [ 247.049919] ? crypto_larval_kill+0x1ed/0x2e0 [ 247.054430] ? crypto_mod_put+0xa0/0xa0 [ 247.058430] ? rcu_pm_notify+0xc0/0xc0 [ 247.062331] ? crypto_larval_lookup+0x50/0x50 [ 247.066849] ? free_modinfo_version+0x70/0x70 [ 247.071372] ? trace_hardirqs_off+0xd/0x10 [ 247.075646] ? kfree+0xe4/0x250 [ 247.078927] ? aead_bind+0x11b/0x140 [ 247.082656] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 247.087685] ? trace_hardirqs_on+0xd/0x10 [ 247.091859] ? alg_bind+0x2aa/0x440 [ 247.095506] ? SYSC_bind+0x281/0x3f0 [ 247.099245] ? move_addr_to_kernel.part.18+0x100/0x100 [ 247.104545] ? __alloc_fd+0x750/0x750 [ 247.108372] ? fd_install+0x4d/0x60 [ 247.112037] do_group_exit+0x149/0x400 [ 247.115950] ? SyS_exit+0x30/0x30 [ 247.119420] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 247.124473] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 247.129250] SyS_exit_group+0x1d/0x20 [ 247.133076] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 247.137848] RIP: 0033:0x440a99 [ 247.141054] RSP: 002b:00007ffc5abebf68 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7 [ 247.148773] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000440a99 [ 247.156065] RDX: 0000000000440a99 RSI: 0000000000000058 RDI: 0000000000000000 [ 247.163345] RBP: 000000000001cbc8 R08: 000000005abec108 R09: 0000000000401fd0 [ 247.170643] R10: 000000005abec108 R11: 0000000000000202 R12: 0000000000000000 [ 247.177917] R13: 0000000000401fd0 R14: 0000000000000000 R15: 0000000000000000 [ 247.185229] [ 247.185229] Showing all locks held in the system: [ 247.191572] 2 locks held by khungtaskd/673: [ 247.195923] #0: (rcu_read_lock){....}, at: [<00000000a9ed5249>] watchdog+0x1c5/0xd60 [ 247.204036] #1: (tasklist_lock){.+.+}, at: [<0000000036eecee2>] debug_show_all_locks+0xd3/0x400 [ 247.213111] 2 locks held by getty/3117: [ 247.217085] #0: (&tty->ldisc_sem){++++}, at: [<000000008d3f9495>] ldsem_down_read+0x37/0x40 [ 247.225801] #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000fafb010f>] n_tty_read+0x2f2/0x1a10 [ 247.235120] 2 locks held by getty/3118: [ 247.239112] #0: (&tty->ldisc_sem){++++}, at: [<000000008d3f9495>] ldsem_down_read+0x37/0x40 [ 247.247830] #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000fafb010f>] n_tty_read+0x2f2/0x1a10 [ 247.257154] 2 locks held by getty/3119: [ 247.261142] #0: (&tty->ldisc_sem){++++}, at: [<000000008d3f9495>] ldsem_down_read+0x37/0x40 [ 247.269891] #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000fafb010f>] n_tty_read+0x2f2/0x1a10 [ 247.279231] 2 locks held by getty/3120: [ 247.283214] #0: (&tty->ldisc_sem){++++}, at: [<000000008d3f9495>] ldsem_down_read+0x37/0x40 [ 247.291931] #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000fafb010f>] n_tty_read+0x2f2/0x1a10 [ 247.301254] 2 locks held by getty/3121: [ 247.305243] #0: (&tty->ldisc_sem){++++}, at: [<000000008d3f9495>] ldsem_down_read+0x37/0x40 [ 247.313946] #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000fafb010f>] n_tty_read+0x2f2/0x1a10 [ 247.323277] 2 locks held by getty/3122: [ 247.327247] #0: (&tty->ldisc_sem){++++}, at: [<000000008d3f9495>] ldsem_down_read+0x37/0x40 [ 247.335952] #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000fafb010f>] n_tty_read+0x2f2/0x1a10 [ 247.345274] 2 locks held by getty/3123: [ 247.349274] #0: (&tty->ldisc_sem){++++}, at: [<000000008d3f9495>] ldsem_down_read+0x37/0x40 [ 247.357979] #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000fafb010f>] n_tty_read+0x2f2/0x1a10 [ 247.367327] [ 247.368958] ============================================= [ 247.368958] [ 247.375979] NMI backtrace for cpu 1 [ 247.379622] CPU: 1 PID: 673 Comm: khungtaskd Not tainted 4.15.0-rc2-mm1+ #39 [ 247.386788] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 247.396116] Call Trace: [ 247.398679] dump_stack+0x194/0x257 [ 247.402279] ? arch_local_irq_restore+0x53/0x53 [ 247.406920] ? debug_show_all_locks+0x2f4/0x400 [ 247.411563] ? nmi_cpu_backtrace+0x1be/0x210 [ 247.415946] ? lapic_can_unplug_cpu+0xa0/0xa0 [ 247.420421] nmi_cpu_backtrace+0x1d2/0x210 [ 247.424629] ? lapic_can_unplug_cpu+0xa0/0xa0 [ 247.429094] nmi_trigger_cpumask_backtrace+0x122/0x180 [ 247.434344] arch_trigger_cpumask_backtrace+0x14/0x20 [ 247.439504] watchdog+0x90c/0xd60 [ 247.442938] ? reset_hung_task_detector+0xa0/0xa0 [ 247.447760] ? default_wake_function+0x30/0x50 [ 247.452319] ? __schedule+0x2060/0x2060 [ 247.456261] ? do_wait_intr_irq+0x3e0/0x3e0 [ 247.460557] ? do_raw_spin_trylock+0x190/0x190 [ 247.465111] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 247.470184] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 247.475552] ? trace_hardirqs_on+0xd/0x10 [ 247.479670] ? __kthread_parkme+0x175/0x240 [ 247.483968] kthread+0x37a/0x440 [ 247.487308] ? reset_hung_task_detector+0xa0/0xa0 [ 247.492119] ? kthread_stop+0x7b0/0x7b0 [ 247.496074] ret_from_fork+0x24/0x30 [ 247.499858] Sending NMI from CPU 1 to CPUs 0: [ 247.504387] NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x6/0x10 [ 247.505378] Kernel panic - not syncing: hung_task: blocked tasks [ 247.505384] CPU: 1 PID: 673 Comm: khungtaskd Not tainted 4.15.0-rc2-mm1+ #39 [ 247.505388] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 247.505392] Call Trace: [ 247.505401] dump_stack+0x194/0x257 [ 247.505411] ? arch_local_irq_restore+0x53/0x53 [ 247.505424] ? vsnprintf+0x1ed/0x1900 [ 247.505435] panic+0x1e4/0x41c [ 247.505441] ? refcount_error_report+0x214/0x214 [ 247.505456] ? nmi_trigger_cpumask_backtrace+0xef/0x180 [ 247.505468] watchdog+0x91d/0xd60 [ 247.505485] ? reset_hung_task_detector+0xa0/0xa0 [ 247.505493] ? default_wake_function+0x30/0x50 [ 247.505508] ? __schedule+0x2060/0x2060 [ 247.505514] ? do_wait_intr_irq+0x3e0/0x3e0 [ 247.505523] ? do_raw_spin_trylock+0x190/0x190 [ 247.505532] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 247.505540] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 247.505547] ? trace_hardirqs_on+0xd/0x10 [ 247.505554] ? __kthread_parkme+0x175/0x240 [ 247.505563] kthread+0x37a/0x440 [ 247.505569] ? reset_hung_task_detector+0xa0/0xa0 [ 247.505574] ? kthread_stop+0x7b0/0x7b0 [ 247.505586] ret_from_fork+0x24/0x30 [ 247.621959] Dumping ftrace buffer: [ 247.625584] (ftrace buffer empty) [ 247.629275] Kernel Offset: disabled [ 247.632890] Rebooting in 86400 seconds..