[....] Starting enhanced syslogd: rsyslogd[ 11.133425] audit: type=1400 audit(1513431612.146:5): 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 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: [ 16.610863] audit: type=1400 audit(1513431617.623:6): 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-2,10.128.15.236' (ECDSA) to the list of known hosts. executing program [ 22.849060] audit: type=1400 audit(1513431623.861:7): avc: denied { map } for pid=3139 comm="syzkaller619875" path="/root/syzkaller619875205" 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 [ 22.880791] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 22.901482] kasan: CONFIG_KASAN_INLINE enabled [ 22.906109] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 22.913442] general protection fault: 0000 [#1] SMP KASAN [ 22.918952] Dumping ftrace buffer: [ 22.922456] (ftrace buffer empty) [ 22.926130] Modules linked in: [ 22.929293] CPU: 1 PID: 3139 Comm: syzkaller619875 Not tainted 4.15.0-rc3+ #224 [ 22.936706] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.946046] RIP: 0010:native_write_cr4+0x4/0x10 [ 22.950679] RSP: 0018:ffff8801c92875a0 EFLAGS: 00010093 [ 22.956008] RAX: ffff8801ca7b6680 RBX: 00000000001606e0 RCX: ffffffff811a2a92 [ 22.963244] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 22.970483] RBP: ffff8801c92875a0 R08: 1ffff10039250e0f R09: 0000000000000004 [ 22.977725] R10: ffff8801c9287510 R11: 0000000000000004 R12: 0000000000000093 [ 22.985414] R13: ffff8801ca7b6680 R14: ffff8801db514850 R15: ffff8801db514850 [ 22.992655] FS: 00000000007f7880(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 23.000847] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.006696] CR2: 0000000000000000 CR3: 0000000005e22006 CR4: 00000000001626e0 [ 23.013954] Call Trace: [ 23.016518] hardware_disable+0x34a/0x4b0 [ 23.020645] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 23.025113] kvm_arch_hardware_disable+0x35/0xd0 [ 23.029833] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 23.034291] hardware_disable_nolock+0x30/0x40 [ 23.038850] on_each_cpu+0xca/0x1b0 [ 23.042443] hardware_disable_all_nolock+0x3e/0x50 [ 23.047336] kvm_put_kvm+0x956/0xdf0 [ 23.051017] ? kvm_clear_guest+0xb0/0xb0 [ 23.055049] ? kvm_irqfd_release+0xd1/0x120 [ 23.059340] ? lock_downgrade+0x980/0x980 [ 23.063471] ? _raw_spin_unlock_irq+0x27/0x70 [ 23.067934] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.072924] ? kvm_irqfd_release+0xdd/0x120 [ 23.077212] ? kvm_irqfd_release+0xdd/0x120 [ 23.081502] ? kvm_put_kvm+0xdf0/0xdf0 [ 23.085355] kvm_vm_release+0x42/0x50 [ 23.089121] __fput+0x327/0x7e0 [ 23.092376] ? fput+0x140/0x140 [ 23.095624] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.101474] ? _raw_spin_unlock_irq+0x27/0x70 [ 23.105937] ____fput+0x15/0x20 [ 23.109183] task_work_run+0x199/0x270 [ 23.113039] ? task_work_cancel+0x210/0x210 [ 23.117328] ? _raw_spin_unlock+0x22/0x30 [ 23.121450] ? switch_task_namespaces+0x87/0xc0 [ 23.126088] do_exit+0x9bb/0x1ad0 [ 23.129508] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 23.134751] ? mm_update_next_owner+0x930/0x930 [ 23.139384] ? find_held_lock+0x35/0x1d0 [ 23.143433] ? handle_mm_fault+0x248/0x8d0 [ 23.147649] ? find_held_lock+0x35/0x1d0 [ 23.151688] ? __do_page_fault+0x5f7/0xc90 [ 23.155899] ? lock_downgrade+0x980/0x980 [ 23.160019] ? down_read_trylock+0xdb/0x170 [ 23.164306] ? __do_page_fault+0x32d/0xc90 [ 23.168515] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.173076] ? vmacache_find+0x5f/0x280 [ 23.177036] ? up_read+0x1a/0x40 [ 23.180379] ? __do_page_fault+0x3d6/0xc90 [ 23.184579] ? task_work_run+0x1f4/0x270 [ 23.188614] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 23.193859] ? do_vfs_ioctl+0x486/0x1520 [ 23.197888] ? ioctl_preallocate+0x2b0/0x2b0 [ 23.202262] ? selinux_capable+0x40/0x40 [ 23.206298] ? __close_fd+0x222/0x360 [ 23.210069] do_group_exit+0x149/0x400 [ 23.213929] ? SyS_exit+0x30/0x30 [ 23.217353] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.222336] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.227059] SyS_exit_group+0x1d/0x20 [ 23.230827] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 23.235546] RIP: 0033:0x441c88 [ 23.238716] RSP: 002b:00007fff7ca4d808 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 23.246398] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441c88 [ 23.253633] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 23.260869] RBP: 000000002020a800 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 23.268106] R10: 0000000000000012 R11: 0000000000000246 R12: 0000000000009120 [ 23.275341] R13: 000000002aaaaaab R14: 0000000000000004 R15: 0000000020207000 [ 23.282585] 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 [ 23.301673] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c92875a0 [ 23.307791] ---[ end trace 0fba41733774fd4d ]--- [ 23.312510] Kernel panic - not syncing: Fatal exception [ 23.318276] Dumping ftrace buffer: [ 23.321799] (ftrace buffer empty) [ 23.325477] Kernel Offset: disabled [ 23.329075] Rebooting in 86400 seconds..