[....] Starting enhanced syslogd: rsyslogd[ 10.368782] audit: type=1400 audit(1513424469.350:5): 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: [ 13.242404] audit: type=1400 audit(1513424472.224:6): avc: denied { map } for pid=3129 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-1,10.128.0.7' (ECDSA) to the list of known hosts. executing program [ 23.139195] audit: type=1400 audit(1513424482.120:7): avc: denied { map } for pid=3144 comm="syzkaller406241" path="/root/syzkaller406241661" 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 [ 23.171087] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 23.188496] kasan: CONFIG_KASAN_INLINE enabled [ 23.193117] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 23.200446] general protection fault: 0000 [#1] SMP KASAN [ 23.205949] Dumping ftrace buffer: [ 23.209453] (ftrace buffer empty) [ 23.213132] Modules linked in: [ 23.216294] CPU: 1 PID: 3144 Comm: syzkaller406241 Not tainted 4.15.0-rc3+ #224 [ 23.223704] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.233385] RIP: 0010:native_write_cr4+0x4/0x10 [ 23.238019] RSP: 0018:ffff8801c8ccf5a0 EFLAGS: 00010093 [ 23.243346] RAX: ffff8801c9efa700 RBX: 00000000001606e0 RCX: ffffffff811a2a92 [ 23.250582] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 23.257831] RBP: ffff8801c8ccf5a0 R08: 1ffff10039199e0f R09: 0000000000000004 [ 23.265077] R10: ffff8801c8ccf510 R11: 0000000000000004 R12: 0000000000000093 [ 23.272313] R13: ffff8801c9efa700 R14: ffff8801db514850 R15: ffff8801db514850 [ 23.279551] FS: 0000000002568880(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 23.287742] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.293589] CR2: 0000000000000000 CR3: 0000000005e22001 CR4: 00000000001626e0 [ 23.300826] Call Trace: [ 23.303385] hardware_disable+0x34a/0x4b0 [ 23.307504] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 23.311969] kvm_arch_hardware_disable+0x35/0xd0 [ 23.316689] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 23.321148] hardware_disable_nolock+0x30/0x40 [ 23.325696] on_each_cpu+0xca/0x1b0 [ 23.329291] hardware_disable_all_nolock+0x3e/0x50 [ 23.334186] kvm_put_kvm+0x956/0xdf0 [ 23.337869] ? kvm_clear_guest+0xb0/0xb0 [ 23.341900] ? kvm_irqfd_release+0xd1/0x120 [ 23.346187] ? lock_downgrade+0x980/0x980 [ 23.350309] ? _raw_spin_unlock_irq+0x27/0x70 [ 23.354770] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.359763] ? kvm_irqfd_release+0xdd/0x120 [ 23.364049] ? kvm_irqfd_release+0xdd/0x120 [ 23.368337] ? kvm_put_kvm+0xdf0/0xdf0 [ 23.372191] kvm_vm_release+0x42/0x50 [ 23.375960] __fput+0x327/0x7e0 [ 23.379205] ? fput+0x140/0x140 [ 23.382452] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.388298] ? _raw_spin_unlock_irq+0x27/0x70 [ 23.392762] ____fput+0x15/0x20 [ 23.396008] task_work_run+0x199/0x270 [ 23.399862] ? task_work_cancel+0x210/0x210 [ 23.404145] ? _raw_spin_unlock+0x22/0x30 [ 23.408259] ? switch_task_namespaces+0x87/0xc0 [ 23.412896] do_exit+0x9bb/0x1ad0 [ 23.416315] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 23.421557] ? mm_update_next_owner+0x930/0x930 [ 23.426196] ? mntput_no_expire+0x15e/0xa90 [ 23.430482] ? _raw_spin_unlock+0x22/0x30 [ 23.434597] ? mnt_get_count+0x150/0x150 [ 23.438622] ? find_held_lock+0x35/0x1d0 [ 23.442651] ? task_work_run+0x16c/0x270 [ 23.446681] ? lock_downgrade+0x980/0x980 [ 23.450795] ? mntput+0x66/0x90 [ 23.454040] ? lock_release+0xa40/0xa40 [ 23.457991] ? do_raw_spin_trylock+0x190/0x190 [ 23.462544] ? _raw_spin_unlock_irq+0x27/0x70 [ 23.467007] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.471987] ? trace_hardirqs_on+0xd/0x10 [ 23.476103] ? _raw_spin_unlock_irq+0x27/0x70 [ 23.480564] ? task_work_run+0x1f4/0x270 [ 23.484591] ? task_work_cancel+0x210/0x210 [ 23.488880] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 23.494122] ? do_vfs_ioctl+0x486/0x1520 [ 23.498149] ? ioctl_preallocate+0x2b0/0x2b0 [ 23.502525] ? selinux_capable+0x40/0x40 [ 23.506552] ? __close_fd+0x222/0x360 [ 23.510324] do_group_exit+0x149/0x400 [ 23.514178] ? SyS_exit+0x30/0x30 [ 23.517606] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.522590] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.527311] SyS_exit_group+0x1d/0x20 [ 23.531081] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 23.535803] RIP: 0033:0x441c88 [ 23.538960] RSP: 002b:00007ffca4d92228 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 23.546635] RAX: ffffffffffffffda RBX: 00007ffca4d90de0 RCX: 0000000000441c88 [ 23.553871] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 23.561116] RBP: 0000000000000006 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 23.568352] R10: 0000000000000012 R11: 0000000000000246 R12: 0000000000000000 [ 23.575587] R13: 0000000000000004 R14: 0000000000000004 R15: 0000000020980000 [ 23.582830] 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 [ 23.601898] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c8ccf5a0 [ 23.608016] ---[ end trace 0ab1418bb50f0ff3 ]--- [ 23.612734] Kernel panic - not syncing: Fatal exception [ 23.618121] Dumping ftrace buffer: [ 23.621624] (ftrace buffer empty) [ 23.625301] Kernel Offset: disabled [ 23.628893] Rebooting in 86400 seconds..