[....] Starting enhanced syslogd: rsyslogd[ 12.510854] audit: type=1400 audit(1516466159.228:5): avc: denied { syslog } for pid=3506 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: [ 19.871631] audit: type=1400 audit(1516466166.589:6): avc: denied { map } for pid=3646 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 '10.128.15.225' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program [ 92.028818] audit: type=1400 audit(1516466238.746:7): avc: denied { map } for pid=3663 comm="syzkaller165834" path="/root/syzkaller165834316" 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 403.376107] kasan: CONFIG_KASAN_INLINE enabled [ 403.380826] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 403.388214] general protection fault: 0000 [#1] SMP KASAN [ 403.393775] Dumping ftrace buffer: [ 403.397298] (ftrace buffer empty) [ 403.400985] Modules linked in: [ 403.404149] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.15.0-rc8-next-20180119+ #102 [ 403.411997] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 403.421399] RIP: 0010:loopback_pos_update+0x182/0x1580 [ 403.426645] RSP: 0018:ffff8801db2076d8 EFLAGS: 00010006 [ 403.431979] RAX: dffffc0000000000 RBX: 0000000000000110 RCX: ffffffff842d354d [ 403.439221] RDX: 0000000000000009 RSI: 00000000295f37bf RDI: 0000000000000048 [ 403.446461] RBP: ffff8801db207768 R08: 1ffff1003b640e2d R09: 000000000000000c [ 403.453699] R10: ffff8801db207628 R11: 0000000000000024 R12: 0000000000000000 [ 403.460948] R13: 00000001000193d0 R14: 1ffffffff0d01200 R15: 0000000000000000 [ 403.468189] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 403.476385] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 403.482250] CR2: 000000002054bff0 CR3: 0000000006822003 CR4: 00000000001606f0 [ 403.489490] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 403.496742] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 403.503982] Call Trace: [ 403.506534] [ 403.508664] loopback_timer_function+0x6d/0x277 [ 403.513341] call_timer_fn+0x228/0x820 [ 403.517199] ? loopback_pointer+0x1a0/0x1a0 [ 403.521490] ? process_timeout+0x40/0x40 [ 403.525536] ? __run_timers+0x7e3/0xb70 [ 403.529479] ? lock_downgrade+0x980/0x980 [ 403.533626] ? debug_object_deactivate+0x364/0x560 [ 403.539100] ? lock_release+0xa40/0xa40 [ 403.543064] ? do_raw_spin_trylock+0x190/0x190 [ 403.547620] ? trace_hardirqs_on_caller+0x19e/0x5c0 [ 403.552607] ? loopback_pointer+0x1a0/0x1a0 [ 403.556896] ? loopback_pointer+0x1a0/0x1a0 [ 403.561189] __run_timers+0x7ee/0xb70 [ 403.564976] ? trigger_dyntick_cpu.isra.29+0x160/0x160 [ 403.570251] ? timerqueue_add+0x1e9/0x280 [ 403.574370] ? check_noncircular+0x20/0x20 [ 403.578662] ? enqueue_hrtimer+0x177/0x4b0 [ 403.582864] ? lock_release+0xa40/0xa40 [ 403.586809] ? retrigger_next_event+0x1e0/0x1e0 [ 403.591450] ? find_held_lock+0x35/0x1d0 [ 403.595486] ? clockevents_program_event+0x163/0x2e0 [ 403.600558] ? lock_downgrade+0x980/0x980 [ 403.604690] ? rcu_pm_notify+0xc0/0xc0 [ 403.608561] run_timer_softirq+0x4c/0x70 [ 403.612639] __do_softirq+0x2d7/0xb85 [ 403.616410] ? ktime_get+0x26f/0x3a0 [ 403.620105] ? __irqentry_text_end+0x1f8cf4/0x1f8cf4 [ 403.625177] ? do_timer+0x50/0x50 [ 403.628602] ? native_apic_msr_write+0x5c/0x80 [ 403.633151] ? lapic_next_event+0x54/0x80 [ 403.637268] ? clockevents_program_event+0x108/0x2e0 [ 403.642340] ? tick_program_event+0x83/0x100 [ 403.646721] ? rcu_pm_notify+0xc0/0xc0 [ 403.650585] irq_exit+0x1cc/0x200 [ 403.654019] smp_apic_timer_interrupt+0x16b/0x700 [ 403.658831] ? smp_reschedule_interrupt+0xe6/0x670 [ 403.663729] ? smp_call_function_single_interrupt+0x640/0x640 [ 403.669584] ? _raw_spin_lock+0x32/0x40 [ 403.673540] ? _raw_spin_unlock+0x22/0x30 [ 403.677656] ? handle_edge_irq+0x2b4/0x7c0 [ 403.681870] ? task_prio+0x40/0x40 [ 403.685383] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 403.690197] apic_timer_interrupt+0xa9/0xb0 [ 403.694486] [ 403.696693] RIP: 0010:native_safe_halt+0x6/0x10 [ 403.701328] RSP: 0018:ffffffff86807c38 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff11 [ 403.709020] RAX: dffffc0000000000 RBX: 1ffffffff0d00f8a RCX: 0000000000000000 [ 403.716260] RDX: 1ffffffff0d192a0 RSI: 0000000000000001 RDI: ffffffff868c9500 [ 403.723500] RBP: ffffffff86807c38 R08: 0000000000000000 R09: 0000000000000000 [ 403.730741] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 403.737984] R13: ffffffff86807cf0 R14: ffffffff87044a60 R15: 0000000000000000 [ 403.745242] ? trace_hardirqs_on+0xd/0x10 [ 403.749363] default_idle+0xbf/0x430 [ 403.753047] ? __sched_text_end+0x4/0x4 [ 403.756991] ? rcu_eqs_special_set+0x1e0/0x1e0 [ 403.761544] ? tsc_verify_tsc_adjust+0xf6/0x3e0 [ 403.766186] ? set_cpu_sd_state_idle+0x1dc/0x2d0 [ 403.771016] ? mark_tsc_async_resets+0x30/0x30 [ 403.775577] arch_cpu_idle+0xa/0x10 [ 403.779172] default_idle_call+0x36/0x90 [ 403.783215] do_idle+0x24a/0x3b0 [ 403.786565] cpu_startup_entry+0x104/0x120 [ 403.790770] ? cpu_in_idle+0x20/0x20 [ 403.794461] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 403.799454] ? trace_hardirqs_on+0xd/0x10 [ 403.803573] rest_init+0xed/0xf0 [ 403.806932] start_kernel+0x7f1/0x819 [ 403.810701] ? mem_encrypt_init+0xb/0xb [ 403.814658] ? early_idt_handler_common+0x3b/0x60 [ 403.819475] ? x86_family+0x32/0x40 [ 403.823076] x86_64_start_reservations+0x2a/0x2c [ 403.827802] x86_64_start_kernel+0x77/0x7a [ 403.832009] secondary_startup_64+0xa5/0xb0 [ 403.836314] Code: 00 fc ff df 41 80 3c 06 00 0f 85 e0 11 00 00 49 8d 7f 48 48 b8 00 00 00 00 00 fc ff df 4c 8b 2d 85 5a 53 02 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 b0 11 00 00 4d 89 ec 4d 2b 67 48 4d 89 6f 48 [ 403.855387] RIP: loopback_pos_update+0x182/0x1580 RSP: ffff8801db2076d8 [ 403.862117] ---[ end trace b3ee06361fa96acd ]--- [ 403.866852] Kernel panic - not syncing: Fatal exception in interrupt [ 403.873705] Dumping ftrace buffer: [ 403.877222] (ftrace buffer empty) [ 403.880903] Kernel Offset: disabled [ 403.884513] Rebooting in 86400 seconds..