[....] Starting enhanced syslogd: rsyslogd[ 10.508349] audit: type=1400 audit(1513498018.229:5): avc: denied { syslog } for pid=2993 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: [ 15.817572] audit: type=1400 audit(1513498023.538:6): avc: denied { map } for pid=3132 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-7,10.128.0.39' (ECDSA) to the list of known hosts. executing program [ 21.964347] audit: type=1400 audit(1513498029.685:7): avc: denied { map } for pid=3146 comm="syzkaller039528" path="/root/syzkaller039528647" 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 [ 21.997443] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 22.016661] kasan: CONFIG_KASAN_INLINE enabled [ 22.021264] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 22.028590] general protection fault: 0000 [#1] SMP KASAN [ 22.034093] Dumping ftrace buffer: [ 22.037593] (ftrace buffer empty) [ 22.041267] Modules linked in: [ 22.044425] CPU: 0 PID: 3146 Comm: syzkaller039528 Not tainted 4.15.0-rc3+ #225 [ 22.051831] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.061155] RIP: 0010:native_write_cr4+0x4/0x10 [ 22.065785] RSP: 0018:ffff8801d4b7f5a0 EFLAGS: 00010093 [ 22.071111] RAX: ffff8801cadb4500 RBX: 00000000001606f0 RCX: ffffffff811a2a92 [ 22.078344] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 22.085578] RBP: ffff8801d4b7f5a0 R08: 1ffff1003a96fe0f R09: 0000000000000004 [ 22.092810] R10: ffff8801d4b7f510 R11: 0000000000000004 R12: 0000000000000093 [ 22.100043] R13: ffff8801cadb4500 R14: ffff8801db414850 R15: ffff8801db414850 [ 22.107281] FS: 0000000001cb8880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 22.115469] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.121314] CR2: 0000000000000000 CR3: 0000000005e22003 CR4: 00000000001626f0 [ 22.128550] Call Trace: [ 22.131105] hardware_disable+0x34a/0x4b0 [ 22.135220] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 22.139680] kvm_arch_hardware_disable+0x35/0xd0 [ 22.144400] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 22.148859] hardware_disable_nolock+0x30/0x40 [ 22.153403] on_each_cpu+0xca/0x1b0 [ 22.156993] hardware_disable_all_nolock+0x3e/0x50 [ 22.161888] kvm_put_kvm+0x956/0xdf0 [ 22.165570] ? kvm_clear_guest+0xb0/0xb0 [ 22.169598] ? kvm_irqfd_release+0xd1/0x120 [ 22.173886] ? lock_downgrade+0x980/0x980 [ 22.178094] ? _raw_spin_unlock_irq+0x27/0x70 [ 22.182553] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 22.187534] ? kvm_irqfd_release+0xdd/0x120 [ 22.191819] ? kvm_irqfd_release+0xdd/0x120 [ 22.196104] ? kvm_put_kvm+0xdf0/0xdf0 [ 22.199956] kvm_vm_release+0x42/0x50 [ 22.203720] __fput+0x327/0x7e0 [ 22.206967] ? fput+0x140/0x140 [ 22.210211] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.216057] ? _raw_spin_unlock_irq+0x27/0x70 [ 22.220519] ____fput+0x15/0x20 [ 22.223763] task_work_run+0x199/0x270 [ 22.227615] ? task_work_cancel+0x210/0x210 [ 22.231897] ? _raw_spin_unlock+0x22/0x30 [ 22.236017] ? switch_task_namespaces+0x87/0xc0 [ 22.240653] do_exit+0x9bb/0x1ad0 [ 22.244072] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 22.249313] ? mm_update_next_owner+0x930/0x930 [ 22.253948] ? find_held_lock+0x35/0x1d0 [ 22.257978] ? handle_mm_fault+0x248/0x8d0 [ 22.262178] ? find_held_lock+0x35/0x1d0 [ 22.266210] ? __do_page_fault+0x5f7/0xc90 [ 22.270409] ? lock_downgrade+0x980/0x980 [ 22.274525] ? user_return_notifier_unregister+0x23d/0x360 [ 22.280117] ? uprobe_post_sstep_notifier+0x120/0x120 [ 22.285274] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 22.289825] ? kvm_on_user_return+0xe1/0x3c0 [ 22.294196] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 22.299174] ? trace_hardirqs_on+0xd/0x10 [ 22.303286] ? kvm_on_user_return+0x286/0x3c0 [ 22.307749] ? trace_hardirqs_off+0xd/0x10 [ 22.311949] ? exit_to_usermode_loop+0x198/0x310 [ 22.316668] ? ioctl_preallocate+0x2b0/0x2b0 [ 22.321040] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 22.326539] ? selinux_capable+0x40/0x40 [ 22.330564] ? __close_fd+0x222/0x360 [ 22.334331] do_group_exit+0x149/0x400 [ 22.338181] ? prepare_exit_to_usermode+0x340/0x340 [ 22.343160] ? SyS_exit+0x30/0x30 [ 22.346577] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 22.351556] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 22.356278] SyS_exit_group+0x1d/0x20 [ 22.360042] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 22.364758] RIP: 0033:0x441cb8 [ 22.367913] RSP: 002b:00007ffcda6c3bc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 22.375582] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441cb8 [ 22.382816] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 22.390050] RBP: 00000000006cd018 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 22.397284] R10: 0000000000000012 R11: 0000000000000246 R12: 00000000004040c0 [ 22.404517] R13: 0000000000404150 R14: 0000000000000000 R15: 0000000000000000 [ 22.411765] 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 [ 22.430875] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801d4b7f5a0 [ 22.436987] ---[ end trace e410fb5b7944ca07 ]--- [ 22.441703] Kernel panic - not syncing: Fatal exception [ 22.447465] Dumping ftrace buffer: [ 22.450976] (ftrace buffer empty) [ 22.454649] Kernel Offset: disabled [ 22.458239] Rebooting in 86400 seconds..