[....] Starting enhanced syslogd[ 12.463154] audit: type=1400 audit(1513407799.200:5): avc: denied { syslog } for pid=2991 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 : rsyslogd[?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: [ 17.393726] audit: type=1400 audit(1513407804.131:6): avc: denied { map } for pid=3130 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-mmots-kasan-gce-1,10.128.15.240' (ECDSA) to the list of known hosts. executing program executing program [ 23.706013] audit: type=1400 audit(1513407810.443:7): avc: denied { map } for pid=3144 comm="syzkaller159794" path="/root/syzkaller159794785" 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 [ 23.762096] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 23.798326] kasan: CONFIG_KASAN_INLINE enabled [ 23.802963] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 23.810297] general protection fault: 0000 [#1] SMP KASAN [ 23.815800] Dumping ftrace buffer: [ 23.819304] (ftrace buffer empty) [ 23.822982] Modules linked in: [ 23.826142] CPU: 1 PID: 3148 Comm: syzkaller159794 Not tainted 4.15.0-rc2-mm1+ #39 [ 23.833812] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.843141] RIP: 0010:native_write_cr4+0x4/0x10 [ 23.847772] RSP: 0018:ffff8801c49075a0 EFLAGS: 00010093 [ 23.853100] RAX: ffff8801c52f6040 RBX: 00000000001606e0 RCX: ffffffff811a2d22 [ 23.860337] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 23.867580] RBP: ffff8801c49075a0 R08: ffff8801c4907150 R09: ffff8801c52f6040 [ 23.874816] R10: ffff8801c4907510 R11: ffffed0038920e2c R12: 0000000000000093 [ 23.882052] R13: ffff8801c52f6040 R14: ffff8801db31a130 R15: ffff8801db31a130 [ 23.889289] FS: 0000000001175880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 23.897482] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.903330] CR2: 0000000000000000 CR3: 0000000006225001 CR4: 00000000001626e0 [ 23.910566] Call Trace: [ 23.913125] hardware_disable+0x34a/0x4b0 [ 23.917246] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 23.921710] kvm_arch_hardware_disable+0x35/0xd0 [ 23.926430] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 23.930889] hardware_disable_nolock+0x30/0x40 [ 23.935438] on_each_cpu+0xca/0x1b0 [ 23.939033] hardware_disable_all_nolock+0x3e/0x50 [ 23.943931] kvm_put_kvm+0x956/0xde0 [ 23.947621] ? kvm_clear_guest+0xb0/0xb0 [ 23.951649] ? lock_downgrade+0x980/0x980 [ 23.955772] ? do_raw_spin_trylock+0x190/0x190 [ 23.960322] ? _raw_spin_unlock_irq+0x27/0x70 [ 23.964783] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.969768] ? kvm_irqfd_release+0xdd/0x120 [ 23.974053] ? kvm_irqfd_release+0xdd/0x120 [ 23.978340] ? kvm_put_kvm+0xde0/0xde0 [ 23.982192] kvm_vm_release+0x42/0x50 [ 23.985960] __fput+0x333/0x7f0 [ 23.989211] ? fput+0x140/0x140 [ 23.992459] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.998307] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.002771] ____fput+0x15/0x20 [ 24.006024] task_work_run+0x199/0x270 [ 24.009881] ? task_work_cancel+0x210/0x210 [ 24.014171] ? _raw_spin_unlock+0x22/0x30 [ 24.018287] ? switch_task_namespaces+0x87/0xc0 [ 24.022924] do_exit+0x9bb/0x1ae0 [ 24.026346] ? hrtimer_try_to_cancel+0x51/0x5c0 [ 24.030980] ? mm_update_next_owner+0x930/0x930 [ 24.035614] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 24.040512] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.046361] ? _do_fork+0x2ae/0xf10 [ 24.049961] ? rcu_note_context_switch+0x710/0x710 [ 24.054862] ? fork_idle+0x2d0/0x2d0 [ 24.058545] ? __might_sleep+0x95/0x190 [ 24.062493] ? do_nanosleep+0x4fc/0x6e0 [ 24.066442] ? schedule_timeout_idle+0x90/0x90 [ 24.070998] ? memset+0x31/0x40 [ 24.074256] ? hrtimer_nanosleep+0x2cc/0x860 [ 24.078633] ? nanosleep_copyout+0x100/0x100 [ 24.083009] ? __might_sleep+0x95/0x190 [ 24.086956] ? kasan_check_write+0x14/0x20 [ 24.091158] ? _copy_from_user+0x99/0x110 [ 24.095276] ? __hrtimer_init+0x140/0x140 [ 24.099392] ? syscall_return_slowpath+0x550/0x550 [ 24.104292] do_group_exit+0x149/0x400 [ 24.108147] ? SyS_exit+0x30/0x30 [ 24.111569] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.116552] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.121279] SyS_exit_group+0x1d/0x20 [ 24.125056] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 24.129776] RIP: 0033:0x4490f9 [ 24.132932] RSP: 002b:00007ffd55aea398 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7 [ 24.140612] RAX: ffffffffffffffda RBX: 00007ff477d83700 RCX: 00000000004490f9 [ 24.147848] RDX: 0000000000474961 RSI: 0000000000000000 RDI: 0000000000000000 [ 24.155086] RBP: 00007ffd55aea340 R08: 00000000006debc0 R09: 0000000000000000 [ 24.162323] R10: 00000000006deb44 R11: 0000000000000206 R12: 0000000000000000 [ 24.169568] R13: 00007ffd55aea33f R14: 00007ff477d839c0 R15: 0000000000000000 [ 24.176813] 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 [ 24.195876] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c49075a0 [ 24.201991] ---[ end trace ca48060d5dfac416 ]--- [ 24.206711] Kernel panic - not syncing: Fatal exception [ 24.212487] Dumping ftrace buffer: [ 24.216005] (ftrace buffer empty) [ 24.219682] Kernel Offset: disabled [ 24.223275] Rebooting in 86400 seconds..