[....] Starting enhanced syslogd: rsyslogd[ 10.675007] audit: type=1400 audit(1514610261.606:5): avc: denied { syslog } for pid=3042 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: [ 17.620891] audit: type=1400 audit(1514610268.552:6): avc: denied { map } for pid=3183 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 '10.128.0.59' (ECDSA) to the list of known hosts. executing program [ 36.620287] audit: type=1400 audit(1514610287.552:7): avc: denied { map } for pid=3200 comm="syzkaller045869" path="/root/syzkaller045869618" 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 [ 36.653744] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 36.667437] kasan: CONFIG_KASAN_INLINE enabled [ 36.672034] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.679388] general protection fault: 0000 [#1] SMP KASAN [ 36.684892] Dumping ftrace buffer: [ 36.688394] (ftrace buffer empty) [ 36.692071] Modules linked in: [ 36.695232] CPU: 0 PID: 3200 Comm: syzkaller045869 Not tainted 4.15.0-rc5+ #151 [ 36.702639] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.711971] RIP: 0010:native_write_cr4+0x4/0x10 [ 36.716601] RSP: 0018:ffff8801c701f408 EFLAGS: 00010093 [ 36.721926] RAX: ffff8801c763c280 RBX: 00000000001606f0 RCX: ffffffff811a2f12 [ 36.729162] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 36.736402] RBP: ffff8801c701f408 R08: 1ffff10038e03ddd R09: 0000000000000004 [ 36.743636] R10: ffff8801c701f378 R11: 0000000000000004 R12: 0000000000000093 [ 36.750869] R13: ffff8801c763c280 R14: ffff8801db215850 R15: ffff8801db215850 [ 36.758103] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 36.766291] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 36.772136] CR2: 0000000000000000 CR3: 0000000006022003 CR4: 00000000001626f0 [ 36.779379] Call Trace: [ 36.781933] hardware_disable+0x34a/0x4b0 [ 36.786048] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 36.790509] kvm_arch_hardware_disable+0x35/0xd0 [ 36.795229] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 36.799689] hardware_disable_nolock+0x30/0x40 [ 36.804246] on_each_cpu+0xca/0x1b0 [ 36.807839] hardware_disable_all_nolock+0x3e/0x50 [ 36.812732] kvm_put_kvm+0x956/0xdf0 [ 36.816415] ? kvm_clear_guest+0xb0/0xb0 [ 36.820446] ? kvm_irqfd_release+0xd1/0x120 [ 36.824733] ? lock_downgrade+0x980/0x980 [ 36.828853] ? _raw_spin_unlock_irq+0x27/0x70 [ 36.833315] ? kvm_irqfd_release+0xdd/0x120 [ 36.837599] ? kvm_irqfd_release+0xdd/0x120 [ 36.841884] ? kvm_put_kvm+0xdf0/0xdf0 [ 36.845735] kvm_vm_release+0x42/0x50 [ 36.849500] __fput+0x327/0x7e0 [ 36.852746] ? fput+0x140/0x140 [ 36.855995] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 36.861840] ? _raw_spin_unlock_irq+0x27/0x70 [ 36.866302] ____fput+0x15/0x20 [ 36.869545] task_work_run+0x199/0x270 [ 36.873399] ? task_work_cancel+0x210/0x210 [ 36.877687] ? _raw_spin_unlock+0x22/0x30 [ 36.881799] ? switch_task_namespaces+0x87/0xc0 [ 36.886432] do_exit+0x9bb/0x1ad0 [ 36.889849] ? rcu_read_lock_sched_held+0x108/0x120 [ 36.894827] ? kfree+0x1f3/0x260 [ 36.898159] ? mm_update_next_owner+0x930/0x930 [ 36.902796] ? trace_event_raw_event_kvm_age_page+0x340/0x340 [ 36.908644] ? selinux_cred_prepare+0x43/0xa0 [ 36.913104] ? security_prepare_creds+0x7d/0xb0 [ 36.917735] ? prepare_creds+0x2b1/0x360 [ 36.921761] ? SyS_setreuid+0xd5/0x700 [ 36.925612] ? SyS_setreuid16+0x52/0x60 [ 36.929557] ? do_fast_syscall_32+0x3ee/0xf9d [ 36.934019] ? entry_SYSENTER_compat+0x54/0x63 [ 36.938564] ? save_stack+0xa3/0xd0 [ 36.942157] ? find_held_lock+0x35/0x1d0 [ 36.946190] ? map_id_range_down+0x182/0x400 [ 36.950563] ? __put_user_ns+0x60/0x60 [ 36.954417] ? commit_creds+0x719/0x1030 [ 36.958457] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 36.963350] ? selinux_file_ioctl+0x444/0x690 [ 36.967808] ? __fget_light+0x297/0x380 [ 36.971750] ? kvm_vcpu_compat_ioctl+0x1d6/0x450 [ 36.976472] ? kvm_vcpu_ioctl+0x1010/0x1010 [ 36.980758] ? prepare_creds+0x2ba/0x360 [ 36.984788] do_group_exit+0x149/0x400 [ 36.988641] ? security_file_ioctl+0x7d/0xb0 [ 36.993020] ? security_file_ioctl+0x89/0xb0 [ 36.997399] ? SyS_exit+0x30/0x30 [ 37.000819] ? compat_SyS_ioctl+0x77/0x2a30 [ 37.005105] ? do_fast_syscall_32+0x156/0xf9d [ 37.009567] ? do_group_exit+0x400/0x400 [ 37.013592] SyS_exit_group+0x1d/0x20 [ 37.017360] do_fast_syscall_32+0x3ee/0xf9d [ 37.021651] ? do_int80_syscall_32+0x9d0/0x9d0 [ 37.026198] ? kasan_check_read+0x11/0x20 [ 37.030309] ? syscall_return_slowpath+0x550/0x550 [ 37.035205] ? SyS_rt_sigaction+0x94/0x1b0 [ 37.039410] ? SyS_sigprocmask+0x4b0/0x4b0 [ 37.043608] ? SyS_read+0x184/0x220 [ 37.047203] ? sysret32_from_system_call+0x5/0x3b [ 37.052014] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.056825] entry_SYSENTER_compat+0x54/0x63 [ 37.061198] RIP: 0023:0xf7f57c79 [ 37.064524] RSP: 002b:00000000fff6587c EFLAGS: 00000292 ORIG_RAX: 00000000000000fc [ 37.072206] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000080eb298 [ 37.079448] RDX: 0000000000000000 RSI: 00000000080d5918 RDI: 00000000080eb2a0 [ 37.086685] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 37.093921] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 37.101155] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 37.108398] 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 [ 37.127461] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c701f408 [ 37.133575] ---[ end trace 136e472b7889c466 ]--- [ 37.138294] Kernel panic - not syncing: Fatal exception [ 37.143654] Dumping ftrace buffer: [ 37.147160] (ftrace buffer empty) [ 37.150836] Kernel Offset: disabled [ 37.154426] Rebooting in 86400 seconds..