[....] Starting enhanced syslogd: rsyslogd[ 10.504732] audit: type=1400 audit(1513457172.038:5): avc: denied { syslog } for pid=2985 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: [ 12.738701] audit: type=1400 audit(1513457174.272:6): avc: denied { map } for pid=3126 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-kasan-gce-6,10.128.15.240' (ECDSA) to the list of known hosts. executing program [ 18.912531] audit: type=1400 audit(1513457180.446:7): avc: denied { map } for pid=3140 comm="syzkaller417561" path="/root/syzkaller417561357" 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 [ 18.945585] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 18.963210] kasan: CONFIG_KASAN_INLINE enabled [ 18.967832] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 18.975170] general protection fault: 0000 [#1] SMP KASAN [ 18.980683] Dumping ftrace buffer: [ 18.984186] (ftrace buffer empty) [ 18.987860] Modules linked in: [ 18.991023] CPU: 1 PID: 3140 Comm: syzkaller417561 Not tainted 4.15.0-rc3+ #224 [ 18.998435] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.007767] RIP: 0010:native_write_cr4+0x4/0x10 [ 19.012397] RSP: 0018:ffff8801c7d8f5a0 EFLAGS: 00010093 [ 19.017723] RAX: ffff8801c9cd4080 RBX: 00000000001606e0 RCX: ffffffff811a2a92 [ 19.024956] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 19.032189] RBP: ffff8801c7d8f5a0 R08: 1ffff10038fb1e0f R09: 0000000000000004 [ 19.039424] R10: ffff8801c7d8f510 R11: 0000000000000004 R12: 0000000000000093 [ 19.047033] R13: ffff8801c9cd4080 R14: ffff8801db514850 R15: ffff8801db514850 [ 19.054269] FS: 0000000000e02880(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 19.062460] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 19.068314] CR2: 0000000000000000 CR3: 0000000005e22002 CR4: 00000000001626e0 [ 19.075549] Call Trace: [ 19.078108] hardware_disable+0x34a/0x4b0 [ 19.082222] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 19.086683] kvm_arch_hardware_disable+0x35/0xd0 [ 19.091402] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 19.095860] hardware_disable_nolock+0x30/0x40 [ 19.100409] on_each_cpu+0xca/0x1b0 [ 19.104001] hardware_disable_all_nolock+0x3e/0x50 [ 19.108898] kvm_put_kvm+0x956/0xdf0 [ 19.112579] ? kvm_clear_guest+0xb0/0xb0 [ 19.116613] ? kvm_irqfd_release+0xd1/0x120 [ 19.120900] ? lock_downgrade+0x980/0x980 [ 19.125027] ? _raw_spin_unlock_irq+0x27/0x70 [ 19.129489] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 19.134482] ? kvm_irqfd_release+0xdd/0x120 [ 19.138774] ? kvm_irqfd_release+0xdd/0x120 [ 19.143062] ? kvm_put_kvm+0xdf0/0xdf0 [ 19.146917] kvm_vm_release+0x42/0x50 [ 19.150682] __fput+0x327/0x7e0 [ 19.153930] ? fput+0x140/0x140 [ 19.157177] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 19.163027] ? _raw_spin_unlock_irq+0x27/0x70 [ 19.167488] ____fput+0x15/0x20 [ 19.170732] task_work_run+0x199/0x270 [ 19.174583] ? task_work_cancel+0x210/0x210 [ 19.178868] ? _raw_spin_unlock+0x22/0x30 [ 19.182981] ? switch_task_namespaces+0x87/0xc0 [ 19.187617] do_exit+0x9bb/0x1ad0 [ 19.191035] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 19.196277] ? mm_update_next_owner+0x930/0x930 [ 19.200908] ? find_held_lock+0x35/0x1d0 [ 19.204948] ? handle_mm_fault+0x248/0x8d0 [ 19.209149] ? find_held_lock+0x35/0x1d0 [ 19.213181] ? __do_page_fault+0x5f7/0xc90 [ 19.217379] ? lock_downgrade+0x980/0x980 [ 19.221494] ? down_read_trylock+0xdb/0x170 [ 19.225779] ? __do_page_fault+0x32d/0xc90 [ 19.229977] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 19.234522] ? vmacache_find+0x5f/0x280 [ 19.238461] ? up_read+0x1a/0x40 [ 19.241791] ? __do_page_fault+0x3d6/0xc90 [ 19.245989] ? task_work_run+0x1f4/0x270 [ 19.250036] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 19.255281] ? do_vfs_ioctl+0x486/0x1520 [ 19.259310] ? ioctl_preallocate+0x2b0/0x2b0 [ 19.263688] ? selinux_capable+0x40/0x40 [ 19.267718] ? __close_fd+0x222/0x360 [ 19.271491] do_group_exit+0x149/0x400 [ 19.275344] ? SyS_exit+0x30/0x30 [ 19.278763] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 19.283745] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 19.288472] SyS_exit_group+0x1d/0x20 [ 19.292244] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 19.296961] RIP: 0033:0x441cb8 [ 19.300119] RSP: 002b:00007ffc1debeb78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 19.307789] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441cb8 [ 19.315023] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 19.322263] RBP: 000000002054e800 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 19.329497] R10: 0000000000000012 R11: 0000000000000246 R12: 0000000000009120 [ 19.336732] R13: 000000002aaaaaab R14: 0000000000000004 R15: 000000002054b000 [ 19.343976] 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 [ 19.363081] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c7d8f5a0 [ 19.369193] ---[ end trace 6fde8535b6b516db ]--- [ 19.373911] Kernel panic - not syncing: Fatal exception [ 19.379670] Dumping ftrace buffer: [ 19.383179] (ftrace buffer empty) [ 19.387029] Kernel Offset: disabled [ 19.390621] Rebooting in 86400 seconds..