[....] Starting enhanced syslogd: rsyslogd[ 12.072678] audit: type=1400 audit(1515252011.106:5): avc: denied { syslog } for pid=3339 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: [ 16.951267] audit: type=1400 audit(1515252015.984:6): avc: denied { map } for pid=3477 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 '10.128.0.44' (ECDSA) to the list of known hosts. executing program [ 23.158063] audit: type=1400 audit(1515252022.191:7): avc: denied { map } for pid=3491 comm="syzkaller804475" path="/root/syzkaller804475178" 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 [ 23.191677] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 23.210411] kasan: CONFIG_KASAN_INLINE enabled [ 23.215040] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 23.222375] general protection fault: 0000 [#1] SMP KASAN [ 23.227881] Dumping ftrace buffer: [ 23.231386] (ftrace buffer empty) [ 23.235063] Modules linked in: [ 23.238226] CPU: 0 PID: 3491 Comm: syzkaller804475 Not tainted 4.15.0-rc6+ #249 [ 23.245636] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.254976] RIP: 0010:native_write_cr4+0x4/0x10 [ 23.259608] RSP: 0018:ffff8801c048f5a0 EFLAGS: 00010093 [ 23.264936] RAX: ffff8801c07d6040 RBX: 00000000001606f0 RCX: ffffffff811a32c2 [ 23.272172] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 23.279410] RBP: ffff8801c048f5a0 R08: 1ffff10038091e0f R09: 0000000000000004 [ 23.286646] R10: ffff8801c048f510 R11: 0000000000000004 R12: 0000000000000093 [ 23.293884] R13: ffff8801c07d6040 R14: ffff8801db21d130 R15: ffff8801db21d130 [ 23.301124] FS: 0000000001215880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 23.309318] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.315169] CR2: 0000000000000000 CR3: 0000000006822004 CR4: 00000000001626f0 [ 23.322407] Call Trace: [ 23.324971] hardware_disable+0x34a/0x4b0 [ 23.329091] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 23.333558] kvm_arch_hardware_disable+0x35/0xd0 [ 23.338279] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 23.342740] hardware_disable_nolock+0x30/0x40 [ 23.347299] on_each_cpu+0xca/0x1b0 [ 23.350901] hardware_disable_all_nolock+0x3e/0x50 [ 23.355820] kvm_put_kvm+0x956/0xdf0 [ 23.359506] ? kvm_clear_guest+0xb0/0xb0 [ 23.363536] ? kvm_irqfd_release+0xd1/0x120 [ 23.367828] ? lock_downgrade+0x980/0x980 [ 23.371954] ? _raw_spin_unlock_irq+0x27/0x70 [ 23.376419] ? kvm_irqfd_release+0xdd/0x120 [ 23.380707] ? kvm_irqfd_release+0xdd/0x120 [ 23.384998] ? kvm_put_kvm+0xdf0/0xdf0 [ 23.388855] kvm_vm_release+0x42/0x50 [ 23.392626] __fput+0x327/0x7e0 [ 23.395882] ? fput+0x140/0x140 [ 23.399132] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.404986] ? _raw_spin_unlock_irq+0x27/0x70 [ 23.409450] ____fput+0x15/0x20 [ 23.412697] task_work_run+0x199/0x270 [ 23.416550] ? task_work_cancel+0x210/0x210 [ 23.420841] ? _raw_spin_unlock+0x22/0x30 [ 23.424958] ? switch_task_namespaces+0x87/0xc0 [ 23.429597] do_exit+0x9bb/0x1ad0 [ 23.433024] ? trace_event_raw_event_kvm_age_page+0x340/0x340 [ 23.438878] ? mm_update_next_owner+0x930/0x930 [ 23.443512] ? find_held_lock+0x35/0x1d0 [ 23.447543] ? handle_mm_fault+0x248/0x8d0 [ 23.451745] ? find_held_lock+0x35/0x1d0 [ 23.455780] ? __do_page_fault+0x5f7/0xc90 [ 23.459982] ? lock_downgrade+0x980/0x980 [ 23.464629] ? down_read_trylock+0xdb/0x170 [ 23.468921] ? __do_page_fault+0x32d/0xc90 [ 23.473123] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.477673] ? vmacache_find+0x5f/0x280 [ 23.481615] ? up_read+0x1a/0x40 [ 23.484948] ? __do_page_fault+0x3d6/0xc90 [ 23.489150] ? task_work_run+0x1f4/0x270 [ 23.493185] ? trace_event_raw_event_kvm_age_page+0x340/0x340 [ 23.499034] ? do_vfs_ioctl+0x486/0x1520 [ 23.503063] ? ioctl_preallocate+0x2b0/0x2b0 [ 23.507442] ? selinux_capable+0x40/0x40 [ 23.511472] ? __close_fd+0x222/0x360 [ 23.515249] do_group_exit+0x149/0x400 [ 23.519106] ? SyS_exit+0x30/0x30 [ 23.522528] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.527514] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.532238] SyS_exit_group+0x1d/0x20 [ 23.536011] entry_SYSCALL_64_fastpath+0x23/0x9a [ 23.540736] RIP: 0033:0x441c18 [ 23.543895] RSP: 002b:00007ffec907fe28 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 23.551567] RAX: ffffffffffffffda RBX: 00000000205b3000 RCX: 0000000000441c18 [ 23.558820] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 23.566058] RBP: 0000000000000000 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 23.573295] R10: 0000000000000012 R11: 0000000000000246 R12: 0000000000000000 [ 23.580543] R13: 00000000205b6e00 R14: ffffffffffffffff R15: 00000000205b3000 [ 23.587796] 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 [ 23.606898] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c048f5a0 [ 23.613019] ---[ end trace 53f0851a61844e27 ]--- [ 23.617742] Kernel panic - not syncing: Fatal exception [ 23.623530] Dumping ftrace buffer: [ 23.627042] (ftrace buffer empty) [ 23.630729] Kernel Offset: disabled [ 23.634335] Rebooting in 86400 seconds..