[....] Starting enhanced syslogd: rsyslogd[ 9.771785] audit: type=1400 audit(1514192489.922:5): avc: denied { syslog } for pid=2985 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: [ 12.374867] audit: type=1400 audit(1514192492.525:6): avc: denied { map } for pid=3124 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-3,10.128.0.39' (ECDSA) to the list of known hosts. executing program [ 18.571073] audit: type=1400 audit(1514192498.721:7): avc: denied { map } for pid=3138 comm="syzkaller794902" path="/root/syzkaller794902330" 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 [ 18.604303] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 18.619308] kasan: CONFIG_KASAN_INLINE enabled [ 18.623905] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 18.631235] general protection fault: 0000 [#1] SMP KASAN [ 18.636737] Dumping ftrace buffer: [ 18.640240] (ftrace buffer empty) [ 18.643915] Modules linked in: [ 18.647074] CPU: 1 PID: 3138 Comm: syzkaller794902 Not tainted 4.15.0-rc5+ #237 [ 18.654483] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 18.663840] RIP: 0010:native_write_cr4+0x4/0x10 [ 18.668472] RSP: 0018:ffff8801bde975a0 EFLAGS: 00010093 [ 18.673800] RAX: ffff8801ca00c700 RBX: 00000000001606e0 RCX: ffffffff811a2f12 [ 18.681040] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 18.688279] RBP: ffff8801bde975a0 R08: 1ffff10037bd2e0f R09: 0000000000000004 [ 18.695520] R10: ffff8801bde97510 R11: 0000000000000004 R12: 0000000000000093 [ 18.702765] R13: ffff8801ca00c700 R14: ffff8801db515850 R15: ffff8801db515850 [ 18.710012] FS: 0000000001ae3880(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 18.718210] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 18.724059] CR2: 0000000000000000 CR3: 0000000005e22002 CR4: 00000000001626e0 [ 18.731296] Call Trace: [ 18.733853] hardware_disable+0x34a/0x4b0 [ 18.737969] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 18.742429] kvm_arch_hardware_disable+0x35/0xd0 [ 18.747150] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 18.751610] hardware_disable_nolock+0x30/0x40 [ 18.756155] on_each_cpu+0xca/0x1b0 [ 18.759748] hardware_disable_all_nolock+0x3e/0x50 [ 18.764640] kvm_put_kvm+0x956/0xdf0 [ 18.768323] ? kvm_clear_guest+0xb0/0xb0 [ 18.772350] ? kvm_irqfd_release+0xd1/0x120 [ 18.776638] ? lock_downgrade+0x980/0x980 [ 18.780758] ? _raw_spin_unlock_irq+0x27/0x70 [ 18.785223] ? kvm_irqfd_release+0xdd/0x120 [ 18.789507] ? kvm_irqfd_release+0xdd/0x120 [ 18.793800] ? kvm_put_kvm+0xdf0/0xdf0 [ 18.797650] kvm_vm_release+0x42/0x50 [ 18.801418] __fput+0x327/0x7e0 [ 18.804666] ? fput+0x140/0x140 [ 18.807911] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 18.813757] ? _raw_spin_unlock_irq+0x27/0x70 [ 18.818219] ____fput+0x15/0x20 [ 18.821464] task_work_run+0x199/0x270 [ 18.825319] ? task_work_cancel+0x210/0x210 [ 18.829606] ? _raw_spin_unlock+0x22/0x30 [ 18.833717] ? switch_task_namespaces+0x87/0xc0 [ 18.838352] do_exit+0x9bb/0x1ad0 [ 18.841770] ? trace_event_raw_event_kvm_age_page+0x340/0x340 [ 18.847625] ? mm_update_next_owner+0x930/0x930 [ 18.852261] ? find_held_lock+0x35/0x1d0 [ 18.856294] ? handle_mm_fault+0x248/0x8d0 [ 18.860493] ? find_held_lock+0x35/0x1d0 [ 18.864525] ? __do_page_fault+0x5f7/0xc90 [ 18.868724] ? lock_downgrade+0x980/0x980 [ 18.872841] ? down_read_trylock+0xdb/0x170 [ 18.877128] ? __do_page_fault+0x32d/0xc90 [ 18.881329] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 18.885875] ? vmacache_find+0x5f/0x280 [ 18.889816] ? up_read+0x1a/0x40 [ 18.893154] ? __do_page_fault+0x3d6/0xc90 [ 18.897352] ? task_work_run+0x1f4/0x270 [ 18.901386] ? trace_event_raw_event_kvm_age_page+0x340/0x340 [ 18.907245] ? do_vfs_ioctl+0x486/0x1520 [ 18.911286] ? ioctl_preallocate+0x2b0/0x2b0 [ 18.915677] ? selinux_capable+0x40/0x40 [ 18.919714] ? __close_fd+0x222/0x360 [ 18.923483] do_group_exit+0x149/0x400 [ 18.927335] ? SyS_exit+0x30/0x30 [ 18.930754] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 18.935735] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 18.940456] SyS_exit_group+0x1d/0x20 [ 18.944223] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 18.948942] RIP: 0033:0x441c68 [ 18.952098] RSP: 002b:00007ffea96d2d88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 18.959767] RAX: ffffffffffffffda RBX: 0000000020fc4800 RCX: 0000000000441c68 [ 18.967001] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 18.974242] RBP: 0000000020fc4000 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 18.981476] R10: 0000000000000012 R11: 0000000000000246 R12: 0000000020fc7e00 [ 18.988709] R13: 0000000020fc6e00 R14: 0000000020fc7a00 R15: 0000000020fc3000 [ 18.995951] 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 [ 19.015027] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801bde975a0 [ 19.021153] ---[ end trace 0f15bfb3288c7bab ]--- [ 19.025872] Kernel panic - not syncing: Fatal exception [ 19.031570] Dumping ftrace buffer: [ 19.035078] (ftrace buffer empty) [ 19.038750] Kernel Offset: disabled [ 19.042340] Rebooting in 86400 seconds..