[....] Starting enhanced syslogd: rsyslogd[ 11.470392] audit: type=1400 audit(1513788111.381:5): avc: denied { syslog } for pid=3004 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 18.349589] audit: type=1400 audit(1513788118.260:6): avc: denied { map } for pid=3144 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-1,10.128.15.194' (ECDSA) to the list of known hosts. executing program executing program [ 24.550750] audit: type=1400 audit(1513788124.461:7): avc: denied { map } for pid=3158 comm="syzkaller617215" path="/root/syzkaller617215123" 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 [ 24.585133] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu executing program [ 24.812397] kasan: CONFIG_KASAN_INLINE enabled [ 24.817016] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.824349] general protection fault: 0000 [#1] SMP KASAN [ 24.829857] Dumping ftrace buffer: [ 24.833371] (ftrace buffer empty) [ 24.837049] Modules linked in: [ 24.840214] CPU: 1 PID: 3175 Comm: syzkaller617215 Not tainted 4.15.0-rc4+ #230 [ 24.847626] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.856955] RIP: 0010:native_write_cr4+0x4/0x10 [ 24.861589] RSP: 0018:ffff8801c8e7f5a0 EFLAGS: 00010093 [ 24.866919] RAX: ffff8801c99d2340 RBX: 00000000001606e0 RCX: ffffffff811a2c72 [ 24.874156] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 24.881403] RBP: ffff8801c8e7f5a0 R08: 1ffff100391cfe0f R09: 0000000000000004 [ 24.888642] R10: ffff8801c8e7f510 R11: 0000000000000004 R12: 0000000000000093 [ 24.895879] R13: ffff8801c99d2340 R14: ffff8801db515850 R15: ffff8801db515850 [ 24.903128] FS: 00000000022a5880(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 24.911321] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.917171] CR2: 00007fb611810000 CR3: 0000000005e22004 CR4: 00000000001626e0 [ 24.924411] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.931650] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.938888] Call Trace: [ 24.941448] hardware_disable+0x34a/0x4b0 [ 24.945565] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 24.950030] kvm_arch_hardware_disable+0x35/0xd0 [ 24.954753] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 24.959215] hardware_disable_nolock+0x30/0x40 [ 24.963764] on_each_cpu+0xca/0x1b0 [ 24.967357] hardware_disable_all_nolock+0x3e/0x50 [ 24.972255] kvm_put_kvm+0x956/0xdf0 [ 24.975940] ? kvm_clear_guest+0xb0/0xb0 [ 24.979971] ? kvm_irqfd_release+0xd1/0x120 [ 24.984259] ? lock_downgrade+0x980/0x980 [ 24.988384] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.992863] ? kvm_irqfd_release+0xdd/0x120 [ 24.997152] ? kvm_irqfd_release+0xdd/0x120 [ 25.001455] ? kvm_put_kvm+0xdf0/0xdf0 [ 25.005313] kvm_vm_release+0x42/0x50 [ 25.009083] __fput+0x327/0x7e0 [ 25.012331] ? fput+0x140/0x140 [ 25.015579] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.021431] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.025895] ____fput+0x15/0x20 [ 25.029152] task_work_run+0x199/0x270 [ 25.033008] ? task_work_cancel+0x210/0x210 [ 25.037297] ? _raw_spin_unlock+0x22/0x30 [ 25.041410] ? switch_task_namespaces+0x87/0xc0 [ 25.046049] do_exit+0x9bb/0x1ad0 [ 25.049473] ? mm_update_next_owner+0x930/0x930 [ 25.054113] ? free_object+0x150/0x230 [ 25.057968] ? lock_downgrade+0x980/0x980 [ 25.062086] ? lock_release+0xa40/0xa40 [ 25.066032] ? do_raw_spin_trylock+0x190/0x190 [ 25.070931] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 25.076262] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.081246] ? trace_hardirqs_on+0xd/0x10 [ 25.085364] ? free_object+0x150/0x230 [ 25.089219] ? debug_stats_show+0xd0/0xd0 [ 25.093333] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 25.098404] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.103390] ? debug_object_free+0x2f1/0x5a0 [ 25.107769] ? debug_object_destroy+0x2b0/0x2b0 [ 25.112408] ? memset+0x31/0x40 [ 25.115660] ? hrtimer_nanosleep+0x2a0/0x4d0 [ 25.120037] ? nanosleep_copyout+0x100/0x100 [ 25.124413] ? enqueue_hrtimer+0x4a0/0x4a0 [ 25.129241] ? syscall_return_slowpath+0x550/0x550 [ 25.134139] do_group_exit+0x149/0x400 [ 25.137994] ? SyS_exit+0x30/0x30 [ 25.141414] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.146407] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.151133] SyS_exit_group+0x1d/0x20 [ 25.154901] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 25.159625] RIP: 0033:0x449009 [ 25.162782] RSP: 002b:00007fffd163cd78 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7 [ 25.170456] RAX: ffffffffffffffda RBX: 00007fd858203700 RCX: 0000000000449009 [ 25.177711] RDX: 00000000004741a1 RSI: 0000000000000000 RDI: 0000000000000000 [ 25.184949] RBP: 00007fffd163cd20 R08: 00000000006dd1c0 R09: 0000000000000000 [ 25.192187] R10: 00000000006dd144 R11: 0000000000000202 R12: 0000000000000000 [ 25.199423] R13: 00007fffd163cd1f R14: 00007fd8582039c0 R15: 0000000000000000 [ 25.206671] 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 [ 25.225742] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c8e7f5a0 [ 25.231857] ---[ end trace df90d166447492c0 ]--- [ 25.237185] Kernel panic - not syncing: Fatal exception [ 25.242548] Dumping ftrace buffer: [ 25.246054] (ftrace buffer empty) [ 25.249734] Kernel Offset: disabled [ 25.253326] Rebooting in 86400 seconds..