[....] Starting enhanced syslogd: rsyslogd[ 12.086217] audit: type=1400 audit(1513390467.363:5): avc: denied { syslog } for pid=2991 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: [ 17.519201] audit: type=1400 audit(1513390472.796:6): avc: denied { map } for pid=3131 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-mmots-kasan-gce-1,10.128.15.204' (ECDSA) to the list of known hosts. executing program [ 38.882665] audit: type=1400 audit(1513390494.160:7): avc: denied { map } for pid=3149 comm="syzkaller442123" path="/root/syzkaller442123686" 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 [ 38.916723] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 38.937455] kasan: CONFIG_KASAN_INLINE enabled [ 38.942077] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 38.949415] general protection fault: 0000 [#1] SMP KASAN [ 38.954921] Dumping ftrace buffer: [ 38.958427] (ftrace buffer empty) [ 38.962101] Modules linked in: [ 38.965263] CPU: 1 PID: 3149 Comm: syzkaller442123 Not tainted 4.15.0-rc2-mm1+ #39 [ 38.972934] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.982263] RIP: 0010:native_write_cr4+0x4/0x10 [ 38.986893] RSP: 0018:ffff8801c3c675a0 EFLAGS: 00010093 [ 38.992220] RAX: ffff8801c6474440 RBX: 00000000001606e0 RCX: ffffffff811a2d22 [ 38.999665] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 39.006900] RBP: ffff8801c3c675a0 R08: ffff8801c3c67150 R09: ffff8801c6474440 [ 39.014136] R10: ffff8801c3c67510 R11: ffffed003878ce2c R12: 0000000000000093 [ 39.021989] R13: ffff8801c6474440 R14: ffff8801db31a130 R15: ffff8801db31a130 [ 39.029228] FS: 000000000147b880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 39.037421] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.043270] CR2: 0000000000000000 CR3: 0000000006225003 CR4: 00000000001626e0 [ 39.050776] Call Trace: [ 39.054032] hardware_disable+0x34a/0x4b0 [ 39.059377] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 39.063844] kvm_arch_hardware_disable+0x35/0xd0 [ 39.068566] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 39.073031] hardware_disable_nolock+0x30/0x40 [ 39.077588] on_each_cpu+0xca/0x1b0 [ 39.081182] hardware_disable_all_nolock+0x3e/0x50 [ 39.086083] kvm_put_kvm+0x956/0xde0 [ 39.089766] ? kvm_clear_guest+0xb0/0xb0 [ 39.094425] ? lock_downgrade+0x980/0x980 [ 39.098547] ? do_raw_spin_trylock+0x190/0x190 [ 39.103100] ? _raw_spin_unlock_irq+0x27/0x70 [ 39.107569] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 39.112554] ? kvm_irqfd_release+0xdd/0x120 [ 39.116840] ? kvm_irqfd_release+0xdd/0x120 [ 39.121128] ? kvm_put_kvm+0xde0/0xde0 [ 39.124988] kvm_vm_release+0x42/0x50 [ 39.128755] __fput+0x333/0x7f0 [ 39.132003] ? fput+0x140/0x140 [ 39.135251] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 39.141102] ? _raw_spin_unlock_irq+0x27/0x70 [ 39.145566] ____fput+0x15/0x20 [ 39.148828] task_work_run+0x199/0x270 [ 39.152692] ? task_work_cancel+0x210/0x210 [ 39.157158] ? _raw_spin_unlock+0x22/0x30 [ 39.161275] ? switch_task_namespaces+0x87/0xc0 [ 39.165913] do_exit+0x9bb/0x1ae0 [ 39.169333] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 39.174579] ? mm_update_next_owner+0x930/0x930 [ 39.179216] ? find_held_lock+0x39/0x1d0 [ 39.183248] ? lock_downgrade+0x980/0x980 [ 39.187373] ? down_read_trylock+0xdb/0x170 [ 39.191663] ? __handle_mm_fault+0x3dd0/0x3dd0 [ 39.196213] ? vmacache_find+0x5f/0x280 [ 39.200155] ? up_read+0x1a/0x40 [ 39.203490] ? __do_page_fault+0x3d6/0xc90 [ 39.207697] ? task_work_run+0x1f4/0x270 [ 39.211731] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 39.216984] ? do_vfs_ioctl+0x492/0x1530 [ 39.221014] ? ioctl_preallocate+0x2b0/0x2b0 [ 39.225403] ? selinux_capable+0x40/0x40 [ 39.229452] ? __close_fd+0x222/0x360 [ 39.233240] do_group_exit+0x149/0x400 [ 39.237096] ? SyS_exit+0x30/0x30 [ 39.240518] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 39.245505] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 39.250230] SyS_exit_group+0x1d/0x20 [ 39.254003] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 39.258725] RIP: 0033:0x441ca8 [ 39.261886] RSP: 002b:00007ffe62122688 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 39.269559] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441ca8 [ 39.276799] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 39.284034] RBP: 00000000202b2800 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 39.291271] R10: 0000000000000012 R11: 0000000000000246 R12: 0000000000009120 [ 39.298506] R13: 000000002aaaaaab R14: 0000000000000004 R15: 00000000202af000 [ 39.306271] 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 [ 39.325443] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c3c675a0 [ 39.332265] ---[ end trace e02a471356f7b653 ]--- [ 39.338739] Kernel panic - not syncing: Fatal exception [ 39.345752] Dumping ftrace buffer: [ 39.350303] (ftrace buffer empty) [ 39.355110] Kernel Offset: disabled [ 39.359746] Rebooting in 86400 seconds..