[....] Starting enhanced syslogd: rsyslogd[ 11.088680] audit: type=1400 audit(1513574211.938:5): 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 [?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: [ 16.612554] audit: type=1400 audit(1513574217.462:6): 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 [ 20.965095] audit: type=1400 audit(1513574221.814:7): avc: denied { map } for pid=3143 comm="sh" path="/bin/dash" dev="sda1" ino=1473 scontext=system_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-7,10.128.15.228' (ECDSA) to the list of known hosts. executing program executing program [ 22.816527] audit: type=1400 audit(1513574223.666:8): avc: denied { map } for pid=3147 comm="syzkaller738612" path="/root/syzkaller738612457" 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 [ 22.856542] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 25.566562] kasan: CONFIG_KASAN_INLINE enabled [ 25.571195] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 25.578534] general protection fault: 0000 [#1] SMP KASAN [ 25.584040] Dumping ftrace buffer: [ 25.587552] (ftrace buffer empty) [ 25.591226] Modules linked in: [ 25.594384] CPU: 0 PID: 3497 Comm: syzkaller738612 Not tainted 4.15.0-rc3+ #226 [ 25.601793] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.611118] RIP: 0010:native_write_cr4+0x4/0x10 [ 25.615748] RSP: 0018:ffff8801beee75a0 EFLAGS: 00010093 [ 25.621077] RAX: ffff8801d9a54080 RBX: 00000000001606f0 RCX: ffffffff811a2a92 [ 25.628311] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 25.635545] RBP: ffff8801beee75a0 R08: 1ffff10037ddce0f R09: 0000000000000004 [ 25.642778] R10: ffff8801beee7510 R11: 0000000000000004 R12: 0000000000000093 [ 25.650022] R13: ffff8801d9a54080 R14: ffff8801db414850 R15: ffff8801db414850 [ 25.657260] FS: 0000000001846880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 25.665451] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.671300] CR2: 0000000000000000 CR3: 0000000005e22003 CR4: 00000000001626f0 [ 25.678540] Call Trace: [ 25.681098] hardware_disable+0x34a/0x4b0 [ 25.685216] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 25.689682] kvm_arch_hardware_disable+0x35/0xd0 [ 25.694403] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 25.698868] hardware_disable_nolock+0x30/0x40 [ 25.703415] on_each_cpu+0xca/0x1b0 [ 25.707012] hardware_disable_all_nolock+0x3e/0x50 [ 25.711916] kvm_put_kvm+0x956/0xdf0 [ 25.715606] ? kvm_clear_guest+0xb0/0xb0 [ 25.719647] ? kvm_irqfd_release+0xd1/0x120 [ 25.723935] ? lock_downgrade+0x980/0x980 [ 25.728057] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.732518] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.737504] ? kvm_irqfd_release+0xdd/0x120 [ 25.741797] ? kvm_irqfd_release+0xdd/0x120 [ 25.746091] ? kvm_put_kvm+0xdf0/0xdf0 [ 25.749944] kvm_vm_release+0x42/0x50 [ 25.753712] __fput+0x327/0x7e0 [ 25.756957] ? fput+0x140/0x140 [ 25.760202] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.766050] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.770512] ____fput+0x15/0x20 [ 25.773760] task_work_run+0x199/0x270 [ 25.777619] ? task_work_cancel+0x210/0x210 [ 25.781908] ? _raw_spin_unlock+0x22/0x30 [ 25.786025] ? switch_task_namespaces+0x87/0xc0 [ 25.790661] do_exit+0x9bb/0x1ad0 [ 25.794084] ? hrtimer_try_to_cancel+0x61/0x5c0 [ 25.798718] ? mm_update_next_owner+0x930/0x930 [ 25.803350] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 25.808246] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.814094] ? check_noncircular+0x20/0x20 [ 25.818299] ? rcu_note_context_switch+0x710/0x710 [ 25.823197] ? __might_sleep+0x95/0x190 [ 25.827140] ? do_nanosleep+0x4fc/0x6e0 [ 25.831083] ? schedule_timeout_idle+0x90/0x90 [ 25.835652] ? memset+0x31/0x40 [ 25.838903] ? hrtimer_nanosleep+0x2cc/0x860 [ 25.843279] ? nanosleep_copyout+0x100/0x100 [ 25.847651] ? __might_sleep+0x95/0x190 [ 25.851595] ? kasan_check_write+0x14/0x20 [ 25.855794] ? _copy_from_user+0x99/0x110 [ 25.859915] ? __hrtimer_init+0x140/0x140 [ 25.864028] ? syscall_return_slowpath+0x550/0x550 [ 25.868927] do_group_exit+0x149/0x400 [ 25.872782] ? SyS_exit+0x30/0x30 [ 25.876202] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.881185] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.885908] SyS_exit_group+0x1d/0x20 [ 25.889675] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 25.894404] RIP: 0033:0x44cd69 [ 25.897559] RSP: 002b:00007ffef3b0d7b8 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7 [ 25.905231] RAX: ffffffffffffffda RBX: 00007f54d83cf700 RCX: 000000000044cd69 [ 25.912465] RDX: 0000000000478041 RSI: 0000000000000000 RDI: 0000000000000000 [ 25.919704] RBP: 00007ffef3b0d760 R08: 00000000006dd1c0 R09: 0000000000000000 [ 25.926937] R10: 00000000006dd144 R11: 0000000000000206 R12: 0000000000000000 [ 25.934175] R13: 00007ffef3b0d75f R14: 00007f54d83cf9c0 R15: 0000000000000000 [ 25.941425] 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 [ 25.960502] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801beee75a0 [ 25.966623] ---[ end trace c9d7245118aa74a2 ]--- [ 25.971341] Kernel panic - not syncing: Fatal exception [ 25.976701] Dumping ftrace buffer: [ 25.980210] (ftrace buffer empty) [ 25.983894] Kernel Offset: disabled [ 25.987485] Rebooting in 86400 seconds..