[....] Starting enhanced syslogd: rsyslogd[ 9.681902] audit: type=1400 audit(1513422468.835:5): 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: [ 12.836311] audit: type=1400 audit(1513422471.990:6): avc: denied { map } for pid=3119 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-0,10.128.15.242' (ECDSA) to the list of known hosts. executing program [ 36.172967] audit: type=1400 audit(1513422495.326:7): avc: denied { map } for pid=3138 comm="syzkaller057284" path="/root/syzkaller057284458" 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 [ 36.204320] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 36.232566] kasan: CONFIG_KASAN_INLINE enabled [ 36.237157] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.244482] general protection fault: 0000 [#1] SMP KASAN [ 36.249984] Dumping ftrace buffer: [ 36.253487] (ftrace buffer empty) [ 36.257161] Modules linked in: [ 36.260319] CPU: 0 PID: 3138 Comm: syzkaller057284 Not tainted 4.15.0-rc3+ #224 [ 36.267728] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.277064] RIP: 0010:native_write_cr4+0x4/0x10 [ 36.281693] RSP: 0018:ffff8801c8baf5a0 EFLAGS: 00010093 [ 36.287021] RAX: ffff8801caa4e080 RBX: 00000000001606f0 RCX: ffffffff811a2a92 [ 36.294254] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 36.301488] RBP: ffff8801c8baf5a0 R08: 1ffff10039175e0f R09: 0000000000000004 [ 36.308723] R10: ffff8801c8baf510 R11: 0000000000000004 R12: 0000000000000093 [ 36.315957] R13: ffff8801caa4e080 R14: ffff8801db414850 R15: ffff8801db414850 [ 36.323196] FS: 0000000002103880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 36.331384] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.337229] CR2: 0000000000000000 CR3: 0000000005e22004 CR4: 00000000001626f0 [ 36.344462] Call Trace: [ 36.347014] hardware_disable+0x34a/0x4b0 [ 36.351130] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 36.355591] kvm_arch_hardware_disable+0x35/0xd0 [ 36.360308] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 36.364765] hardware_disable_nolock+0x30/0x40 [ 36.369313] on_each_cpu+0xca/0x1b0 [ 36.372904] hardware_disable_all_nolock+0x3e/0x50 [ 36.377805] kvm_put_kvm+0x956/0xdf0 [ 36.381487] ? kvm_clear_guest+0xb0/0xb0 [ 36.385517] ? kvm_irqfd_release+0xd1/0x120 [ 36.389809] ? lock_downgrade+0x980/0x980 [ 36.393935] ? _raw_spin_unlock_irq+0x27/0x70 [ 36.398401] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 36.403381] ? kvm_irqfd_release+0xdd/0x120 [ 36.408178] ? kvm_irqfd_release+0xdd/0x120 [ 36.412465] ? kvm_put_kvm+0xdf0/0xdf0 [ 36.416316] kvm_vm_release+0x42/0x50 [ 36.420079] __fput+0x327/0x7e0 [ 36.423323] ? fput+0x140/0x140 [ 36.426566] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 36.432413] ? _raw_spin_unlock_irq+0x27/0x70 [ 36.436871] ____fput+0x15/0x20 [ 36.440114] task_work_run+0x199/0x270 [ 36.443965] ? task_work_cancel+0x210/0x210 [ 36.448247] ? _raw_spin_unlock+0x22/0x30 [ 36.452358] ? switch_task_namespaces+0x87/0xc0 [ 36.456993] do_exit+0x9bb/0x1ad0 [ 36.460407] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 36.465650] ? mm_update_next_owner+0x930/0x930 [ 36.470286] ? mntput_no_expire+0x15e/0xa90 [ 36.474568] ? _raw_spin_unlock+0x22/0x30 [ 36.478680] ? mnt_get_count+0x150/0x150 [ 36.482708] ? find_held_lock+0x35/0x1d0 [ 36.486737] ? task_work_run+0x16c/0x270 [ 36.490765] ? lock_downgrade+0x980/0x980 [ 36.494876] ? mntput+0x66/0x90 [ 36.498118] ? lock_release+0xa40/0xa40 [ 36.502056] ? do_raw_spin_trylock+0x190/0x190 [ 36.506602] ? _raw_spin_unlock_irq+0x27/0x70 [ 36.511059] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 36.516039] ? trace_hardirqs_on+0xd/0x10 [ 36.520147] ? _raw_spin_unlock_irq+0x27/0x70 [ 36.524603] ? task_work_run+0x1f4/0x270 [ 36.528626] ? task_work_cancel+0x210/0x210 [ 36.532910] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 36.538148] ? do_vfs_ioctl+0x486/0x1520 [ 36.542173] ? ioctl_preallocate+0x2b0/0x2b0 [ 36.546546] ? selinux_capable+0x40/0x40 [ 36.550574] ? __close_fd+0x222/0x360 [ 36.554338] do_group_exit+0x149/0x400 [ 36.558188] ? SyS_exit+0x30/0x30 [ 36.561604] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 36.566586] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 36.571306] SyS_exit_group+0x1d/0x20 [ 36.575069] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 36.579789] RIP: 0033:0x441c78 [ 36.582944] RSP: 002b:00007ffdef14f518 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 36.590614] RAX: ffffffffffffffda RBX: 00007ffdef14e0d0 RCX: 0000000000441c78 [ 36.597852] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 36.605086] RBP: 0000000000000006 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 36.612319] R10: 0000000000000012 R11: 0000000000000246 R12: 0000000000000000 [ 36.619551] R13: 0000000000000004 R14: 0000000000000004 R15: 0000000020ac0000 [ 36.626800] 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 [ 36.645871] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c8baf5a0 [ 36.651983] ---[ end trace 2141e8a227105cbd ]--- [ 36.656700] Kernel panic - not syncing: Fatal exception [ 36.662066] Dumping ftrace buffer: [ 36.665569] (ftrace buffer empty) [ 36.669242] Kernel Offset: disabled [ 36.672833] Rebooting in 86400 seconds..