[....] Starting enhanced syslogd: rsyslogd[ 11.333493] audit: type=1400 audit(1514940894.841:5): avc: denied { syslog } for pid=3346 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 15.705485] audit: type=1400 audit(1514940899.213:6): avc: denied { map } for pid=3485 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 '10.128.15.193' (ECDSA) to the list of known hosts. executing program [ 21.955239] audit: type=1400 audit(1514940905.463:7): avc: denied { map } for pid=3499 comm="syzkaller965413" path="/root/syzkaller965413025" 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 [ 21.992308] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 22.026886] kasan: CONFIG_KASAN_INLINE enabled [ 22.031663] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 22.038994] general protection fault: 0000 [#1] SMP KASAN [ 22.044504] Dumping ftrace buffer: [ 22.048013] (ftrace buffer empty) [ 22.051692] Modules linked in: [ 22.054854] CPU: 0 PID: 7 Comm: ksoftirqd/0 Not tainted 4.15.0-rc6+ #245 [ 22.061656] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.070992] RIP: 0010:native_write_cr4+0x4/0x10 [ 22.075631] RSP: 0018:ffff8801db207ca8 EFLAGS: 00010006 [ 22.080959] RAX: ffff8801d9f321c0 RBX: 00000000001606f0 RCX: ffffffff811a3242 [ 22.088925] RDX: 0000000000010100 RSI: 0000000000000000 RDI: 00000000001606f0 [ 22.096163] RBP: ffff8801db207ca8 R08: ffff8801d9f3f660 R09: 0000000000000000 [ 22.105196] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000006 [ 22.112436] R13: ffff8801d9f321c0 R14: ffff8801db21a130 R15: ffff8801db21a130 [ 22.121090] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 22.129808] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.135666] CR2: 0000000000000000 CR3: 0000000006822001 CR4: 00000000001626f0 [ 22.142911] Call Trace: [ 22.145464] [ 22.147588] hardware_disable+0x34a/0x4b0 [ 22.151704] ? irq_work_sync+0x1a0/0x1a0 [ 22.155732] ? lock_downgrade+0x980/0x980 [ 22.159850] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 22.164323] kvm_arch_hardware_disable+0x35/0xd0 [ 22.169045] hardware_disable_nolock+0x30/0x40 [ 22.173685] flush_smp_call_function_queue+0x1f4/0x570 [ 22.178929] ? cpumask_weight+0x40/0x40 [ 22.182872] ? tick_program_event+0x83/0x100 [ 22.187251] ? __lock_is_held+0xb6/0x140 [ 22.191285] generic_smp_call_function_single_interrupt+0x13/0x30 [ 22.197482] smp_call_function_single_interrupt+0x103/0x640 [ 22.203248] ? smp_call_function_interrupt+0x640/0x640 [ 22.208489] ? _raw_spin_lock+0x32/0x40 [ 22.212677] ? _raw_spin_unlock+0x22/0x30 [ 22.216794] ? handle_edge_irq+0x2b4/0x7c0 [ 22.221136] ? task_prio+0x40/0x40 [ 22.224652] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 22.229466] ? __d_free+0x20/0x30 [ 22.232885] call_function_single_interrupt+0xa9/0xb0 [ 22.238045] [ 22.240258] RIP: 0010:kmem_cache_free+0x17c/0x2a0 [ 22.245063] RSP: 0018:ffff8801d9f3f918 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff04 [ 22.252742] RAX: 0000000000000007 RBX: ffff8801cede7460 RCX: 0000000000000002 [ 22.259977] RDX: 0000000000000000 RSI: ffff8801d9f32a38 RDI: 0000000000000282 [ 22.267216] RBP: ffff8801d9f3f938 R08: ffff8801d9f3f660 R09: 0000000000000000 [ 22.274452] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801dae2a480 [ 22.281688] R13: 0000000000000282 R14: ffffffff81b56fe0 R15: ffff8801d9f3fc20 [ 22.288931] ? __d_free+0x20/0x30 [ 22.292362] ? __d_free_external+0x60/0x60 [ 22.296563] __d_free+0x20/0x30 [ 22.299811] rcu_process_callbacks+0xd6c/0x17f0 [ 22.304458] ? note_gp_changes+0x650/0x650 [ 22.308662] ? do_raw_spin_trylock+0x190/0x190 [ 22.313221] ? _raw_spin_unlock_irq+0x27/0x70 [ 22.317690] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 22.322675] ? trace_hardirqs_on+0xd/0x10 [ 22.326790] ? finish_task_switch+0x1d3/0x740 [ 22.331248] ? finish_task_switch+0x1aa/0x740 [ 22.335709] ? copy_overflow+0x20/0x20 [ 22.339569] ? __schedule+0x8f3/0x2060 [ 22.343428] ? rcu_pm_notify+0xc0/0xc0 [ 22.347290] __do_softirq+0x2d7/0xb85 [ 22.351064] ? __irqentry_text_end+0x1f8d74/0x1f8d74 [ 22.356139] ? schedule+0xf5/0x430 [ 22.359653] ? rcu_note_context_switch+0x710/0x710 [ 22.364547] ? schedule+0xf5/0x430 [ 22.368053] ? run_ksoftirqd+0x55/0x100 [ 22.371999] ? takeover_tasklets+0xa40/0xa40 [ 22.376375] run_ksoftirqd+0x50/0x100 [ 22.380155] smpboot_thread_fn+0x450/0x7c0 [ 22.384358] ? sort_range+0x30/0x30 [ 22.387951] ? __kthread_parkme+0xcf/0x240 [ 22.392154] ? __kthread_parkme+0x175/0x240 [ 22.396454] kthread+0x33c/0x400 [ 22.399788] ? sort_range+0x30/0x30 [ 22.403380] ? kthread_stop+0x7a0/0x7a0 [ 22.407330] ret_from_fork+0x24/0x30 [ 22.411026] Code: 0f 1f 80 00 00 00 00 55 48 89 e5 0f 20 d8 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 0f 22 df 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 <0f> 22 e7 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 44 0f 20 c0 5d [ 22.430114] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801db207ca8 [ 22.436236] ---[ end trace 8d7618b5c08a6192 ]--- [ 22.440956] Kernel panic - not syncing: Fatal exception in interrupt [ 22.447867] Dumping ftrace buffer: [ 22.451389] (ftrace buffer empty) [ 22.455066] Kernel Offset: disabled [ 22.458656] Rebooting in 86400 seconds..