[....] Starting enhanced syslogd: rsyslogd[ 10.106888] audit: type=1400 audit(1513568757.160:5): avc: denied { syslog } for pid=2988 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: [ 13.148108] audit: type=1400 audit(1513568760.201:6): avc: denied { map } for pid=3126 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-1,10.128.0.19' (ECDSA) to the list of known hosts. executing program [ 19.299261] audit: type=1400 audit(1513568766.352:7): avc: denied { map } for pid=3140 comm="syzkaller582160" path="/root/syzkaller582160385" 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 [ 19.332597] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 19.352497] kasan: CONFIG_KASAN_INLINE enabled [ 19.357115] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 19.364447] general protection fault: 0000 [#1] SMP KASAN [ 19.369951] Dumping ftrace buffer: [ 19.373456] (ftrace buffer empty) [ 19.377134] Modules linked in: [ 19.380293] CPU: 1 PID: 3140 Comm: syzkaller582160 Not tainted 4.15.0-rc3+ #226 [ 19.387702] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.397030] RIP: 0010:native_write_cr4+0x4/0x10 [ 19.401663] RSP: 0018:ffff8801d04c75a0 EFLAGS: 00010093 [ 19.406989] RAX: ffff8801cca065c0 RBX: 00000000001606e0 RCX: ffffffff811a2a92 [ 19.414243] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 19.421478] RBP: ffff8801d04c75a0 R08: 1ffff1003a098e0f R09: 0000000000000004 [ 19.428713] R10: ffff8801d04c7510 R11: 0000000000000004 R12: 0000000000000093 [ 19.435949] R13: ffff8801cca065c0 R14: ffff8801db514850 R15: ffff8801db514850 [ 19.443187] FS: 0000000001c1e880(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 19.451377] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 19.457223] CR2: 0000000000000000 CR3: 0000000005e22001 CR4: 00000000001626e0 [ 19.464459] Call Trace: [ 19.467019] hardware_disable+0x34a/0x4b0 [ 19.471146] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 19.475612] kvm_arch_hardware_disable+0x35/0xd0 [ 19.480337] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 19.484799] hardware_disable_nolock+0x30/0x40 [ 19.489346] on_each_cpu+0xca/0x1b0 [ 19.492938] hardware_disable_all_nolock+0x3e/0x50 [ 19.497833] kvm_put_kvm+0x956/0xdf0 [ 19.501520] ? kvm_clear_guest+0xb0/0xb0 [ 19.505548] ? kvm_irqfd_release+0xd1/0x120 [ 19.509835] ? lock_downgrade+0x980/0x980 [ 19.513956] ? _raw_spin_unlock_irq+0x27/0x70 [ 19.518424] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 19.523407] ? kvm_irqfd_release+0xdd/0x120 [ 19.527694] ? kvm_irqfd_release+0xdd/0x120 [ 19.531981] ? kvm_put_kvm+0xdf0/0xdf0 [ 19.535835] kvm_vm_release+0x42/0x50 [ 19.539604] __fput+0x327/0x7e0 [ 19.542857] ? fput+0x140/0x140 [ 19.546104] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 19.551953] ? _raw_spin_unlock_irq+0x27/0x70 [ 19.556416] ____fput+0x15/0x20 [ 19.559666] task_work_run+0x199/0x270 [ 19.563520] ? task_work_cancel+0x210/0x210 [ 19.567805] ? _raw_spin_unlock+0x22/0x30 [ 19.571921] ? switch_task_namespaces+0x87/0xc0 [ 19.576566] do_exit+0x9bb/0x1ad0 [ 19.579995] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 19.585241] ? mm_update_next_owner+0x930/0x930 [ 19.589879] ? mntput_no_expire+0x15e/0xa90 [ 19.594178] ? _raw_spin_unlock+0x22/0x30 [ 19.598293] ? mnt_get_count+0x150/0x150 [ 19.602320] ? find_held_lock+0x35/0x1d0 [ 19.606353] ? task_work_run+0x16c/0x270 [ 19.610392] ? lock_downgrade+0x980/0x980 [ 19.614505] ? mntput+0x66/0x90 [ 19.617752] ? lock_release+0xa40/0xa40 [ 19.621693] ? do_raw_spin_trylock+0x190/0x190 [ 19.626241] ? _raw_spin_unlock_irq+0x27/0x70 [ 19.630703] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 19.635686] ? trace_hardirqs_on+0xd/0x10 [ 19.639797] ? _raw_spin_unlock_irq+0x27/0x70 [ 19.644258] ? task_work_run+0x1f4/0x270 [ 19.648294] ? task_work_cancel+0x210/0x210 [ 19.652584] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 19.657824] ? do_vfs_ioctl+0x486/0x1520 [ 19.661855] ? ioctl_preallocate+0x2b0/0x2b0 [ 19.666232] ? selinux_capable+0x40/0x40 [ 19.670262] ? __close_fd+0x222/0x360 [ 19.674033] do_group_exit+0x149/0x400 [ 19.677887] ? SyS_exit+0x30/0x30 [ 19.681307] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 19.686289] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 19.691017] SyS_exit_group+0x1d/0x20 [ 19.694789] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 19.699508] RIP: 0033:0x441c78 [ 19.702665] RSP: 002b:00007ffe1c27f1a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 19.710338] RAX: ffffffffffffffda RBX: 00007ffe1c27dd60 RCX: 0000000000441c78 [ 19.717580] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 19.724818] RBP: 0000000000000006 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 19.732100] R10: 0000000000000012 R11: 0000000000000246 R12: 0000000000000000 [ 19.739349] R13: 0000000000000004 R14: 0000000000000004 R15: 000000002039d000 [ 19.746602] 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 [ 19.765691] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801d04c75a0 [ 19.771825] ---[ end trace efa83d8b5bffc591 ]--- [ 19.776551] Kernel panic - not syncing: Fatal exception [ 19.781918] Dumping ftrace buffer: [ 19.785427] (ftrace buffer empty) [ 19.789106] Kernel Offset: disabled [ 19.792705] Rebooting in 86400 seconds..