[....] Starting enhanced syslogd: rsyslogd[ 10.127982] audit: type=1400 audit(1513429692.707:5): avc: denied { syslog } for pid=2989 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: [ 12.203241] audit: type=1400 audit(1513429694.783:6): avc: denied { map } for pid=3128 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-7,10.128.0.2' (ECDSA) to the list of known hosts. executing program [ 18.369358] audit: type=1400 audit(1513429700.949:7): avc: denied { map } for pid=3142 comm="syzkaller156271" path="/root/syzkaller156271979" 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 [ 18.401854] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 18.422773] kasan: CONFIG_KASAN_INLINE enabled [ 18.427390] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 18.434719] general protection fault: 0000 [#1] SMP KASAN [ 18.440229] Dumping ftrace buffer: [ 18.443742] (ftrace buffer empty) [ 18.447415] Modules linked in: [ 18.450573] CPU: 0 PID: 3142 Comm: syzkaller156271 Not tainted 4.15.0-rc3+ #224 [ 18.457981] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 18.467305] RIP: 0010:native_write_cr4+0x4/0x10 [ 18.471936] RSP: 0018:ffff8801c97bf5a0 EFLAGS: 00010093 [ 18.477264] RAX: ffff8801c9c060c0 RBX: 00000000001606f0 RCX: ffffffff811a2a92 [ 18.484499] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 18.491735] RBP: ffff8801c97bf5a0 R08: 1ffff100392f7e0f R09: 0000000000000004 [ 18.498969] R10: ffff8801c97bf510 R11: 0000000000000004 R12: 0000000000000093 [ 18.506205] R13: ffff8801c9c060c0 R14: ffff8801db414850 R15: ffff8801db414850 [ 18.513450] FS: 00000000024b9880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 18.521640] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 18.527485] CR2: 0000000000000000 CR3: 0000000005e22002 CR4: 00000000001626f0 [ 18.534721] Call Trace: [ 18.537277] hardware_disable+0x34a/0x4b0 [ 18.541392] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 18.545859] kvm_arch_hardware_disable+0x35/0xd0 [ 18.550576] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 18.555036] hardware_disable_nolock+0x30/0x40 [ 18.559583] on_each_cpu+0xca/0x1b0 [ 18.563174] hardware_disable_all_nolock+0x3e/0x50 [ 18.568066] kvm_put_kvm+0x956/0xdf0 [ 18.571751] ? kvm_clear_guest+0xb0/0xb0 [ 18.575778] ? kvm_irqfd_release+0xd1/0x120 [ 18.580066] ? lock_downgrade+0x980/0x980 [ 18.584188] ? _raw_spin_unlock_irq+0x27/0x70 [ 18.588650] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 18.593634] ? kvm_irqfd_release+0xdd/0x120 [ 18.597919] ? kvm_irqfd_release+0xdd/0x120 [ 18.602206] ? kvm_put_kvm+0xdf0/0xdf0 [ 18.606058] kvm_vm_release+0x42/0x50 [ 18.609824] __fput+0x327/0x7e0 [ 18.613071] ? fput+0x140/0x140 [ 18.616319] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 18.622168] ? _raw_spin_unlock_irq+0x27/0x70 [ 18.626629] ____fput+0x15/0x20 [ 18.629875] task_work_run+0x199/0x270 [ 18.633727] ? task_work_cancel+0x210/0x210 [ 18.638015] ? _raw_spin_unlock+0x22/0x30 [ 18.642131] ? switch_task_namespaces+0x87/0xc0 [ 18.646765] do_exit+0x9bb/0x1ad0 [ 18.650183] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 18.655431] ? mm_update_next_owner+0x930/0x930 [ 18.660064] ? find_held_lock+0x35/0x1d0 [ 18.664096] ? handle_mm_fault+0x248/0x8d0 [ 18.668294] ? find_held_lock+0x35/0x1d0 [ 18.672323] ? __do_page_fault+0x5f7/0xc90 [ 18.676521] ? lock_downgrade+0x980/0x980 [ 18.680635] ? user_return_notifier_unregister+0x23d/0x360 [ 18.686223] ? uprobe_post_sstep_notifier+0x120/0x120 [ 18.691374] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 18.695920] ? vmacache_update+0xfe/0x130 [ 18.700034] ? kvm_on_user_return+0xe1/0x3c0 [ 18.704413] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 18.709406] ? trace_hardirqs_on+0xd/0x10 [ 18.713517] ? kvm_on_user_return+0x286/0x3c0 [ 18.717979] ? trace_hardirqs_off+0xd/0x10 [ 18.722177] ? exit_to_usermode_loop+0x198/0x310 [ 18.726896] ? ioctl_preallocate+0x2b0/0x2b0 [ 18.731270] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 18.736770] ? selinux_capable+0x40/0x40 [ 18.740801] ? __close_fd+0x222/0x360 [ 18.744568] do_group_exit+0x149/0x400 [ 18.748420] ? prepare_exit_to_usermode+0x340/0x340 [ 18.753400] ? SyS_exit+0x30/0x30 [ 18.756819] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 18.761798] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 18.766521] SyS_exit_group+0x1d/0x20 [ 18.770286] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 18.775003] RIP: 0033:0x441c68 [ 18.778162] RSP: 002b:00007fffe52154f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 18.785834] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441c68 [ 18.793071] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 18.800305] RBP: 00000000006cd018 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 18.807538] R10: 0000000000000012 R11: 0000000000000246 R12: 0000000000404070 [ 18.814774] R13: 0000000000404100 R14: 0000000000000000 R15: 0000000000000000 [ 18.822022] 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 [ 18.841092] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c97bf5a0 [ 18.847202] ---[ end trace fd2f2c403b479a8e ]--- [ 18.851919] Kernel panic - not syncing: Fatal exception [ 18.857674] Dumping ftrace buffer: [ 18.861179] (ftrace buffer empty) [ 18.864853] Kernel Offset: disabled [ 18.868442] Rebooting in 86400 seconds..