[....] Starting enhanced syslogd: rsyslogd[ 11.160625] audit: type=1400 audit(1514171972.845:5): avc: denied { syslog } for pid=2998 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: [ 17.105129] audit: type=1400 audit(1514171978.789:6): avc: denied { map } for pid=3136 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-next-kasan-gce-2,10.128.0.14' (ECDSA) to the list of known hosts. executing program [ 23.300660] audit: type=1400 audit(1514171984.985:7): avc: denied { map } for pid=3150 comm="syzkaller167719" path="/root/syzkaller167719669" 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 [ 23.336410] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 23.346820] kvm: vcpu 0: requested 68374 ns lapic timer period limited to 500000 ns [ 23.361109] kasan: CONFIG_KASAN_INLINE enabled [ 23.365725] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 23.373056] general protection fault: 0000 [#1] SMP KASAN [ 23.378559] Dumping ftrace buffer: [ 23.382063] (ftrace buffer empty) [ 23.385744] Modules linked in: [ 23.388907] CPU: 1 PID: 3150 Comm: syzkaller167719 Not tainted 4.15.0-rc4-next-20171221+ #78 [ 23.397445] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.406772] RIP: 0010:native_write_cr4+0x4/0x10 [ 23.411406] RSP: 0018:ffff8801cadaf5a0 EFLAGS: 00010093 [ 23.416734] RAX: ffff8801cde540c0 RBX: 00000000001606e0 RCX: ffffffff811a47f2 [ 23.423968] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 23.431205] RBP: ffff8801cadaf5a0 R08: 1ffff100395b5e0f R09: 0000000000000004 [ 23.438440] R10: ffff8801cadaf510 R11: 0000000000000004 R12: 0000000000000093 [ 23.445676] R13: ffff8801cde540c0 R14: ffff8801db31a130 R15: ffff8801db31a130 [ 23.452913] FS: 00000000013ae880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 23.461104] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.466962] CR2: 0000000000000000 CR3: 0000000006422005 CR4: 00000000001626e0 [ 23.474201] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.481438] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.488675] Call Trace: [ 23.491231] hardware_disable+0x34a/0x4b0 [ 23.495348] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 23.499810] kvm_arch_hardware_disable+0x35/0xd0 [ 23.504532] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 23.508991] hardware_disable_nolock+0x30/0x40 [ 23.513541] on_each_cpu+0xca/0x1b0 [ 23.517137] hardware_disable_all_nolock+0x3e/0x50 [ 23.522031] kvm_put_kvm+0x956/0xde0 [ 23.525716] ? kvm_clear_guest+0xb0/0xb0 [ 23.529748] ? kvm_irqfd_release+0xd1/0x120 [ 23.534039] ? lock_downgrade+0x980/0x980 [ 23.538159] ? trace_hardirqs_off+0xd/0x10 [ 23.542370] ? _raw_spin_unlock_irq+0x27/0x70 [ 23.547013] ? kvm_irqfd_release+0xdd/0x120 [ 23.551302] ? kvm_irqfd_release+0xdd/0x120 [ 23.555589] ? kvm_put_kvm+0xde0/0xde0 [ 23.559441] kvm_vm_release+0x42/0x50 [ 23.563211] __fput+0x327/0x7e0 [ 23.566460] ? fput+0x140/0x140 [ 23.569718] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.575567] ? _raw_spin_unlock_irq+0x27/0x70 [ 23.580032] ____fput+0x15/0x20 [ 23.583278] task_work_run+0x199/0x270 [ 23.587133] ? task_work_cancel+0x210/0x210 [ 23.591418] ? _raw_spin_unlock+0x22/0x30 [ 23.595531] ? switch_task_namespaces+0x87/0xc0 [ 23.600170] do_exit+0x9bb/0x1ad0 [ 23.603592] ? lock_downgrade+0x980/0x980 [ 23.607721] ? mm_update_next_owner+0x930/0x930 [ 23.612360] ? do_raw_spin_trylock+0x190/0x190 [ 23.616905] ? do_raw_spin_trylock+0x190/0x190 [ 23.621457] ? trace_hardirqs_off+0xd/0x10 [ 23.625656] ? _raw_spin_unlock_irqrestore+0xa6/0xba [ 23.630723] ? try_to_wake_up+0xf9/0x1600 [ 23.634838] ? find_held_lock+0x35/0x1d0 [ 23.638867] ? check_noncircular+0x20/0x20 [ 23.643067] ? migrate_swap_stop+0x970/0x970 [ 23.647440] ? lock_downgrade+0x980/0x980 [ 23.651559] ? find_held_lock+0x35/0x1d0 [ 23.655587] ? retint_kernel+0x10/0x10 [ 23.659439] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.664425] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.669148] ? retint_kernel+0x10/0x10 [ 23.673011] ? _raw_spin_unlock_irq+0x56/0x70 [ 23.677478] do_group_exit+0x149/0x400 [ 23.681331] ? do_futex+0x22a0/0x22a0 [ 23.685097] ? SyS_exit+0x30/0x30 [ 23.688518] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.693509] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.698232] SyS_exit_group+0x1d/0x20 [ 23.701996] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 23.706730] RIP: 0033:0x447108 [ 23.709887] RSP: 002b:00007ffffc6e5c08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 23.717563] RAX: ffffffffffffffda RBX: 00007fae31a13700 RCX: 0000000000447108 [ 23.724800] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 23.732036] RBP: 00007ffffc6e5bc0 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 23.739273] R10: 00007ffffc6e5bb0 R11: 0000000000000246 R12: 0000000000000000 [ 23.746508] R13: 00007ffffc6e5b2f R14: 00007fae31a139c0 R15: 0000000000000001 [ 23.753750] 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 [ 23.772850] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801cadaf5a0 [ 23.778973] ---[ end trace c4b3f57890600a0d ]--- [ 23.783692] Kernel panic - not syncing: Fatal exception [ 23.789055] Dumping ftrace buffer: [ 23.792563] (ftrace buffer empty) [ 23.796239] Kernel Offset: disabled [ 23.799831] Rebooting in 86400 seconds..