[....] Starting enhanced syslogd: rsyslogd[ 10.547510] audit: type=1400 audit(1513398363.561:5): avc: denied { syslog } for pid=2984 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: [ 16.358037] audit: type=1400 audit(1513398369.371:6): avc: denied { map } for pid=3124 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-2,10.128.15.211' (ECDSA) to the list of known hosts. executing program [ 22.487818] audit: type=1400 audit(1513398375.501:7): avc: denied { map } for pid=3138 comm="syzkaller764924" path="/root/syzkaller764924605" 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 [ 22.520923] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 22.541659] kasan: CONFIG_KASAN_INLINE enabled [ 22.546254] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 22.553582] general protection fault: 0000 [#1] SMP KASAN [ 22.559083] Dumping ftrace buffer: [ 22.562584] (ftrace buffer empty) [ 22.566258] Modules linked in: [ 22.569424] CPU: 0 PID: 3138 Comm: syzkaller764924 Not tainted 4.15.0-rc3+ #223 [ 22.576831] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.586162] RIP: 0010:native_write_cr4+0x4/0x10 [ 22.590793] RSP: 0018:ffff8801c883f5a0 EFLAGS: 00010093 [ 22.596119] RAX: ffff8801ca5f2640 RBX: 00000000001606f0 RCX: ffffffff811a2a92 [ 22.603352] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 22.610586] RBP: ffff8801c883f5a0 R08: 1ffff10039107e0f R09: 0000000000000004 [ 22.617818] R10: ffff8801c883f510 R11: 0000000000000004 R12: 0000000000000093 [ 22.625053] R13: ffff8801ca5f2640 R14: ffff8801db414850 R15: ffff8801db414850 [ 22.632288] FS: 00000000015d1880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 22.640480] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.646323] CR2: fffffffffffffff8 CR3: 0000000005e22002 CR4: 00000000001626f0 [ 22.653558] Call Trace: [ 22.656111] hardware_disable+0x34a/0x4b0 [ 22.660226] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 22.664686] kvm_arch_hardware_disable+0x35/0xd0 [ 22.669406] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 22.673863] hardware_disable_nolock+0x30/0x40 [ 22.678409] on_each_cpu+0xca/0x1b0 [ 22.682004] hardware_disable_all_nolock+0x3e/0x50 [ 22.686902] kvm_put_kvm+0x956/0xdf0 [ 22.690584] ? kvm_clear_guest+0xb0/0xb0 [ 22.694614] ? kvm_irqfd_release+0xd1/0x120 [ 22.698899] ? lock_downgrade+0x980/0x980 [ 22.703025] ? _raw_spin_unlock_irq+0x27/0x70 [ 22.707486] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 22.712469] ? kvm_irqfd_release+0xdd/0x120 [ 22.716754] ? kvm_irqfd_release+0xdd/0x120 [ 22.721041] ? kvm_put_kvm+0xdf0/0xdf0 [ 22.724892] kvm_vm_release+0x42/0x50 [ 22.728657] __fput+0x327/0x7e0 [ 22.731903] ? fput+0x140/0x140 [ 22.735158] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.741006] ? _raw_spin_unlock_irq+0x27/0x70 [ 22.745471] ____fput+0x15/0x20 [ 22.748716] task_work_run+0x199/0x270 [ 22.752568] ? task_work_cancel+0x210/0x210 [ 22.756852] ? _raw_spin_unlock+0x22/0x30 [ 22.760966] ? switch_task_namespaces+0x87/0xc0 [ 22.765602] do_exit+0x9bb/0x1ad0 [ 22.769023] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 22.774266] ? mm_update_next_owner+0x930/0x930 [ 22.778897] ? find_held_lock+0x35/0x1d0 [ 22.782928] ? handle_mm_fault+0x248/0x8d0 [ 22.787130] ? find_held_lock+0x35/0x1d0 [ 22.791161] ? __do_page_fault+0x5f7/0xc90 [ 22.795361] ? lock_downgrade+0x980/0x980 [ 22.799477] ? user_return_notifier_unregister+0x23d/0x360 [ 22.805066] ? uprobe_post_sstep_notifier+0x120/0x120 [ 22.810218] ? __handle_mm_fault+0x3e20/0x3e20 [ 22.814769] ? kvm_on_user_return+0xe1/0x3c0 [ 22.819145] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 22.824127] ? trace_hardirqs_on+0xd/0x10 [ 22.828238] ? kvm_on_user_return+0x286/0x3c0 [ 22.832700] ? trace_hardirqs_off+0xd/0x10 [ 22.836899] ? exit_to_usermode_loop+0x198/0x310 [ 22.841618] ? ioctl_preallocate+0x2b0/0x2b0 [ 22.845993] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 22.851498] ? selinux_capable+0x40/0x40 [ 22.855527] ? __close_fd+0x222/0x360 [ 22.859297] do_group_exit+0x149/0x400 [ 22.863147] ? prepare_exit_to_usermode+0x340/0x340 [ 22.868128] ? SyS_exit+0x30/0x30 [ 22.871547] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 22.876528] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 22.881249] SyS_exit_group+0x1d/0x20 [ 22.885019] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 22.889739] RIP: 0033:0x442278 [ 22.892894] RSP: 002b:00007ffc0ee21398 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 22.900564] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000442278 [ 22.907797] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 22.915033] RBP: 00000000006ce018 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 22.922268] R10: 00000000208d9000 R11: 0000000000000246 R12: 0000000000404680 [ 22.929503] R13: 0000000000404710 R14: 0000000000000000 R15: 0000000000000000 [ 22.936746] 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 [ 22.955816] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c883f5a0 [ 22.961928] ---[ end trace ac26545126227c2b ]--- [ 22.966645] Kernel panic - not syncing: Fatal exception [ 22.972374] Dumping ftrace buffer: [ 22.975878] (ftrace buffer empty) [ 22.979561] Kernel Offset: disabled [ 22.983152] Rebooting in 86400 seconds..