[....] Starting enhanced syslogd: rsyslogd[ 10.531482] audit: type=1400 audit(1513426640.756:5): avc: denied { syslog } for pid=2983 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: [ 16.808066] audit: type=1400 audit(1513426647.032:6): 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-8,10.128.0.17' (ECDSA) to the list of known hosts. executing program [ 36.746368] audit: type=1400 audit(1513426666.971:7): avc: denied { map } for pid=3142 comm="syzkaller508038" path="/root/syzkaller508038865" 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 [ 36.778579] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 36.795612] kasan: CONFIG_KASAN_INLINE enabled [ 36.800203] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.807531] general protection fault: 0000 [#1] SMP KASAN [ 36.813031] Dumping ftrace buffer: [ 36.816535] (ftrace buffer empty) [ 36.820226] Modules linked in: [ 36.823388] CPU: 0 PID: 3142 Comm: syzkaller508038 Not tainted 4.15.0-rc3+ #224 [ 36.830796] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.840126] RIP: 0010:native_write_cr4+0x4/0x10 [ 36.844757] RSP: 0018:ffff8801c8f775a0 EFLAGS: 00010093 [ 36.850085] RAX: ffff8801ca56e6c0 RBX: 00000000001606f0 RCX: ffffffff811a2a92 [ 36.857319] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 36.864553] RBP: ffff8801c8f775a0 R08: 1ffff100391eee0f R09: 0000000000000004 [ 36.871785] R10: ffff8801c8f77510 R11: 0000000000000004 R12: 0000000000000093 [ 36.879018] R13: ffff8801ca56e6c0 R14: ffff8801db414850 R15: ffff8801db414850 [ 36.886254] FS: 000000000121a880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 36.894444] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.900288] CR2: 0000000000000000 CR3: 0000000005e22003 CR4: 00000000001626f0 [ 36.907531] Call Trace: [ 36.910085] hardware_disable+0x34a/0x4b0 [ 36.914206] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 36.918666] kvm_arch_hardware_disable+0x35/0xd0 [ 36.923385] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 36.927842] hardware_disable_nolock+0x30/0x40 [ 36.932389] on_each_cpu+0xca/0x1b0 [ 36.935982] hardware_disable_all_nolock+0x3e/0x50 [ 36.940875] kvm_put_kvm+0x956/0xdf0 [ 36.944556] ? kvm_clear_guest+0xb0/0xb0 [ 36.948583] ? kvm_irqfd_release+0xd1/0x120 [ 36.952868] ? lock_downgrade+0x980/0x980 [ 36.956996] ? _raw_spin_unlock_irq+0x27/0x70 [ 36.961454] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 36.966438] ? kvm_irqfd_release+0xdd/0x120 [ 36.970721] ? kvm_irqfd_release+0xdd/0x120 [ 36.975004] ? kvm_put_kvm+0xdf0/0xdf0 [ 36.978852] kvm_vm_release+0x42/0x50 [ 36.982620] __fput+0x327/0x7e0 [ 36.985867] ? fput+0x140/0x140 [ 36.989111] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 36.994956] ? _raw_spin_unlock_irq+0x27/0x70 [ 36.999416] ____fput+0x15/0x20 [ 37.002660] task_work_run+0x199/0x270 [ 37.006513] ? task_work_cancel+0x210/0x210 [ 37.010798] ? _raw_spin_unlock+0x22/0x30 [ 37.014910] ? switch_task_namespaces+0x87/0xc0 [ 37.019545] do_exit+0x9bb/0x1ad0 [ 37.022962] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 37.028201] ? mm_update_next_owner+0x930/0x930 [ 37.032832] ? find_held_lock+0x35/0x1d0 [ 37.036861] ? lock_downgrade+0x980/0x980 [ 37.040976] ? lock_release+0xa40/0xa40 [ 37.044914] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 37.050760] ? __do_page_fault+0x5f7/0xc90 [ 37.054958] ? lock_downgrade+0x980/0x980 [ 37.059069] ? __might_sleep+0x95/0x190 [ 37.063009] ? __might_fault+0x188/0x1d0 [ 37.067041] ? perf_event_set_output+0x5a0/0x5a0 [ 37.071761] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 37.077001] ? do_vfs_ioctl+0x486/0x1520 [ 37.081028] ? __fget_light+0x297/0x380 [ 37.084966] ? fget_raw+0x20/0x20 [ 37.088385] ? selinux_capable+0x40/0x40 [ 37.092412] ? __close_fd+0x222/0x360 [ 37.096179] do_group_exit+0x149/0x400 [ 37.100029] ? SyS_exit+0x30/0x30 [ 37.103446] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 37.108425] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 37.113144] SyS_exit_group+0x1d/0x20 [ 37.116909] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 37.121627] RIP: 0033:0x442068 [ 37.124781] RSP: 002b:00007fff7a672a08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 37.132449] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000442068 [ 37.139684] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 37.146925] RBP: 00000000006ce018 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 37.154158] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000404470 [ 37.161393] R13: 0000000000404500 R14: 0000000000000000 R15: 0000000000000000 [ 37.168641] 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 [ 37.187795] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c8f775a0 [ 37.193913] ---[ end trace 130a5b4dbd739340 ]--- [ 37.198630] Kernel panic - not syncing: Fatal exception [ 37.203987] Dumping ftrace buffer: [ 37.207496] (ftrace buffer empty) [ 37.211169] Kernel Offset: disabled [ 37.214758] Rebooting in 86400 seconds..