[....] Starting enhanced syslogd: rsyslogd[ 11.667512] audit: type=1400 audit(1513406641.078:5): avc: denied { syslog } for pid=2994 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: [ 17.468092] audit: type=1400 audit(1513406646.878:6): avc: denied { map } for pid=3133 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-2,10.128.0.42' (ECDSA) to the list of known hosts. executing program [ 23.722272] audit: type=1400 audit(1513406653.133:7): avc: denied { map } for pid=3147 comm="syzkaller929579" path="/root/syzkaller929579344" 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 [ 23.756770] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 23.779117] kasan: CONFIG_KASAN_INLINE enabled [ 23.783751] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 23.791084] general protection fault: 0000 [#1] SMP KASAN [ 23.796587] Dumping ftrace buffer: [ 23.800089] (ftrace buffer empty) [ 23.803763] Modules linked in: [ 23.806924] CPU: 1 PID: 3147 Comm: syzkaller929579 Not tainted 4.15.0-rc2-mm1+ #39 [ 23.814592] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.823917] RIP: 0010:native_write_cr4+0x4/0x10 [ 23.828547] RSP: 0018:ffff8801c6bff5a0 EFLAGS: 00010093 [ 23.833876] RAX: ffff8801c545c080 RBX: 00000000001606e0 RCX: ffffffff811a2d22 [ 23.841109] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 23.848343] RBP: ffff8801c6bff5a0 R08: ffff8801c6bff150 R09: ffff8801c545c080 [ 23.855590] R10: ffff8801c6bff510 R11: ffffed0038d7fe2c R12: 0000000000000093 [ 23.862849] R13: ffff8801c545c080 R14: ffff8801db31a130 R15: ffff8801db31a130 [ 23.870092] FS: 0000000001d51880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 23.878284] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.884129] CR2: 0000000000000000 CR3: 0000000006225005 CR4: 00000000001626e0 [ 23.891367] Call Trace: [ 23.893924] hardware_disable+0x34a/0x4b0 [ 23.898043] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 23.902507] kvm_arch_hardware_disable+0x35/0xd0 [ 23.907227] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 23.911697] hardware_disable_nolock+0x30/0x40 [ 23.916245] on_each_cpu+0xca/0x1b0 [ 23.919838] hardware_disable_all_nolock+0x3e/0x50 [ 23.924732] kvm_put_kvm+0x956/0xde0 [ 23.928425] ? kvm_clear_guest+0xb0/0xb0 [ 23.932453] ? lock_downgrade+0x980/0x980 [ 23.936573] ? do_raw_spin_trylock+0x190/0x190 [ 23.941121] ? _raw_spin_unlock_irq+0x27/0x70 [ 23.945599] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.950582] ? kvm_irqfd_release+0xdd/0x120 [ 23.954867] ? kvm_irqfd_release+0xdd/0x120 [ 23.959153] ? kvm_put_kvm+0xde0/0xde0 [ 23.963006] kvm_vm_release+0x42/0x50 [ 23.966772] __fput+0x333/0x7f0 [ 23.970021] ? fput+0x140/0x140 [ 23.973266] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.979113] ? _raw_spin_unlock_irq+0x27/0x70 [ 23.983575] ____fput+0x15/0x20 [ 23.986822] task_work_run+0x199/0x270 [ 23.990676] ? task_work_cancel+0x210/0x210 [ 23.994962] ? _raw_spin_unlock+0x22/0x30 [ 23.999076] ? switch_task_namespaces+0x87/0xc0 [ 24.003712] do_exit+0x9bb/0x1ae0 [ 24.007130] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 24.012376] ? mm_update_next_owner+0x930/0x930 [ 24.017014] ? find_held_lock+0x39/0x1d0 [ 24.021046] ? lock_downgrade+0x980/0x980 [ 24.025169] ? user_return_notifier_unregister+0x23d/0x360 [ 24.030757] ? uprobe_post_sstep_notifier+0x120/0x120 [ 24.035911] ? __handle_mm_fault+0x3dd0/0x3dd0 [ 24.040461] ? kvm_on_user_return+0xe1/0x3c0 [ 24.044836] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.049815] ? trace_hardirqs_on+0xd/0x10 [ 24.053927] ? kvm_on_user_return+0x286/0x3c0 [ 24.058393] ? trace_hardirqs_off+0xd/0x10 [ 24.062592] ? exit_to_usermode_loop+0x198/0x2f0 [ 24.067314] ? ioctl_preallocate+0x2b0/0x2b0 [ 24.071698] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 24.077199] ? selinux_capable+0x40/0x40 [ 24.081226] ? __close_fd+0x222/0x360 [ 24.084994] do_group_exit+0x149/0x400 [ 24.088846] ? prepare_exit_to_usermode+0x340/0x340 [ 24.093826] ? SyS_exit+0x30/0x30 [ 24.097243] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.102223] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.106947] SyS_exit_group+0x1d/0x20 [ 24.110714] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 24.115435] RIP: 0033:0x441c78 [ 24.118603] RSP: 002b:00007ffc3a9a3608 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 24.126274] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441c78 [ 24.133510] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 24.140744] RBP: 00000000006cd018 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 24.147978] R10: 0000000000000012 R11: 0000000000000246 R12: 0000000000404080 [ 24.155215] R13: 0000000000404110 R14: 0000000000000000 R15: 0000000000000000 [ 24.162458] 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 [ 24.181520] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c6bff5a0 [ 24.187632] ---[ end trace c28da961d77ecc5f ]--- [ 24.192353] Kernel panic - not syncing: Fatal exception [ 24.197713] Dumping ftrace buffer: [ 24.201219] (ftrace buffer empty) [ 24.204896] Kernel Offset: disabled [ 24.208488] Rebooting in 86400 seconds..