[....] Starting enhanced syslogd: rsyslogd[ 10.248639] audit: type=1400 audit(1513459247.648:5): avc: denied { syslog } for pid=2986 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 OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 12.903372] audit: type=1400 audit(1513459250.303:6): avc: denied { map } for pid=3125 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-2,10.128.15.237' (ECDSA) to the list of known hosts. executing program [ 26.078548] audit: type=1400 audit(1513459263.478:7): avc: denied { map } for pid=3141 comm="syzkaller090559" path="/root/syzkaller090559779" 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 [ 26.109799] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 26.123018] kasan: CONFIG_KASAN_INLINE enabled [ 26.127624] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 26.134964] general protection fault: 0000 [#1] SMP KASAN [ 26.140473] Dumping ftrace buffer: [ 26.143982] (ftrace buffer empty) [ 26.147662] Modules linked in: [ 26.150828] CPU: 0 PID: 3141 Comm: syzkaller090559 Not tainted 4.15.0-rc3+ #224 [ 26.158239] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.167569] RIP: 0010:native_write_cr4+0x4/0x10 [ 26.172204] RSP: 0018:ffff8801c26d75a0 EFLAGS: 00010093 [ 26.177543] RAX: ffff8801c785c700 RBX: 00000000001606f0 RCX: ffffffff811a2a92 [ 26.184781] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 26.192035] RBP: ffff8801c26d75a0 R08: 1ffff100384dae0f R09: 0000000000000004 [ 26.199272] R10: ffff8801c26d7510 R11: 0000000000000004 R12: 0000000000000093 [ 26.206508] R13: ffff8801c785c700 R14: ffff8801db414850 R15: ffff8801db414850 [ 26.213747] FS: 000000000158a880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 26.221940] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.227789] CR2: 0000000000000000 CR3: 0000000005e22004 CR4: 00000000001626f0 [ 26.235030] Call Trace: [ 26.237601] hardware_disable+0x34a/0x4b0 [ 26.241721] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 26.246186] kvm_arch_hardware_disable+0x35/0xd0 [ 26.250910] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 26.255372] hardware_disable_nolock+0x30/0x40 [ 26.260260] on_each_cpu+0xca/0x1b0 [ 26.263899] hardware_disable_all_nolock+0x3e/0x50 [ 26.268801] kvm_put_kvm+0x956/0xdf0 [ 26.272486] ? kvm_clear_guest+0xb0/0xb0 [ 26.276523] ? kvm_irqfd_release+0xd1/0x120 [ 26.280815] ? lock_downgrade+0x980/0x980 [ 26.284937] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.289396] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.294387] ? kvm_irqfd_release+0xdd/0x120 [ 26.298673] ? kvm_irqfd_release+0xdd/0x120 [ 26.302957] ? kvm_put_kvm+0xdf0/0xdf0 [ 26.306821] kvm_vm_release+0x42/0x50 [ 26.310602] __fput+0x327/0x7e0 [ 26.313854] ? fput+0x140/0x140 [ 26.317101] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 26.323384] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.327857] ____fput+0x15/0x20 [ 26.331113] task_work_run+0x199/0x270 [ 26.334986] ? task_work_cancel+0x210/0x210 [ 26.339276] ? _raw_spin_unlock+0x22/0x30 [ 26.343388] ? switch_task_namespaces+0x87/0xc0 [ 26.348026] do_exit+0x9bb/0x1ad0 [ 26.351450] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 26.356694] ? mm_update_next_owner+0x930/0x930 [ 26.361454] ? find_held_lock+0x35/0x1d0 [ 26.365486] ? handle_mm_fault+0x248/0x8d0 [ 26.369688] ? find_held_lock+0x35/0x1d0 [ 26.373719] ? __do_page_fault+0x5f7/0xc90 [ 26.377922] ? lock_downgrade+0x980/0x980 [ 26.382042] ? down_read_trylock+0xdb/0x170 [ 26.386329] ? __do_page_fault+0x32d/0xc90 [ 26.390528] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 26.395076] ? vmacache_find+0x5f/0x280 [ 26.399015] ? up_read+0x1a/0x40 [ 26.402347] ? __do_page_fault+0x3d6/0xc90 [ 26.406546] ? task_work_run+0x1f4/0x270 [ 26.410579] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 26.415820] ? do_vfs_ioctl+0x486/0x1520 [ 26.419850] ? ioctl_preallocate+0x2b0/0x2b0 [ 26.424227] ? selinux_capable+0x40/0x40 [ 26.428257] ? __close_fd+0x222/0x360 [ 26.432032] do_group_exit+0x149/0x400 [ 26.435889] ? SyS_exit+0x30/0x30 [ 26.439310] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.444293] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 26.449017] SyS_exit_group+0x1d/0x20 [ 26.452785] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 26.457504] RIP: 0033:0x441c98 [ 26.460660] RSP: 002b:00007ffccb1d51c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 26.468331] RAX: ffffffffffffffda RBX: 0000000020aad000 RCX: 0000000000441c98 [ 26.475574] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 26.482808] RBP: 0000000000000000 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 26.490045] R10: 0000000000000012 R11: 0000000000000246 R12: 0000000000000000 [ 26.497279] R13: 0000000020ab0e00 R14: ffffffffffffffff R15: 0000000020aad000 [ 26.504551] 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 [ 26.523626] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c26d75a0 [ 26.529741] ---[ end trace bd153ac371f5f828 ]--- [ 26.534459] Kernel panic - not syncing: Fatal exception [ 26.539816] Dumping ftrace buffer: [ 26.543320] (ftrace buffer empty) [ 26.547002] Kernel Offset: disabled [ 26.550596] Rebooting in 86400 seconds..