[....] Starting enhanced syslogd: rsyslogd[ 12.903299] audit: type=1400 audit(1513543168.850:5): avc: denied { syslog } for pid=2995 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: [ 18.045266] audit: type=1400 audit(1513543173.993:6): avc: denied { map } for pid=3136 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-mmots-kasan-gce-0,10.128.0.54' (ECDSA) to the list of known hosts. executing program [ 24.369622] audit: type=1400 audit(1513543180.317:7): avc: denied { map } for pid=3150 comm="syzkaller141354" path="/root/syzkaller141354731" 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 [ 24.413492] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 24.488953] kasan: CONFIG_KASAN_INLINE enabled [ 24.493578] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.500912] general protection fault: 0000 [#1] SMP KASAN [ 24.506415] Dumping ftrace buffer: [ 24.509921] (ftrace buffer empty) [ 24.513597] Modules linked in: [ 24.516757] CPU: 0 PID: 3151 Comm: syzkaller141354 Not tainted 4.15.0-rc2-mm1+ #39 [ 24.524425] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.533754] RIP: 0010:native_write_cr4+0x4/0x10 [ 24.538385] RSP: 0018:ffff8801c40ef5a0 EFLAGS: 00010093 [ 24.543713] RAX: ffff8801c85e4480 RBX: 00000000001606f0 RCX: ffffffff811a2d22 [ 24.550955] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 24.558193] RBP: ffff8801c40ef5a0 R08: ffff8801c40ef150 R09: ffff8801c85e4480 [ 24.565427] R10: ffff8801c40ef510 R11: ffffed003881de2c R12: 0000000000000093 [ 24.572665] R13: ffff8801c85e4480 R14: ffff8801db21a130 R15: ffff8801db21a130 [ 24.579902] FS: 00000000023cf880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 24.588094] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.593943] CR2: 00007f5247a08000 CR3: 0000000006225002 CR4: 00000000001626f0 [ 24.601184] Call Trace: [ 24.603748] hardware_disable+0x34a/0x4b0 [ 24.607867] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 24.612341] kvm_arch_hardware_disable+0x35/0xd0 [ 24.617066] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 24.621530] hardware_disable_nolock+0x30/0x40 [ 24.626089] on_each_cpu+0xca/0x1b0 [ 24.629687] hardware_disable_all_nolock+0x3e/0x50 [ 24.634582] kvm_put_kvm+0x956/0xde0 [ 24.638266] ? kvm_clear_guest+0xb0/0xb0 [ 24.642295] ? lock_downgrade+0x980/0x980 [ 24.646418] ? do_raw_spin_trylock+0x190/0x190 [ 24.650973] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.655436] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.660421] ? kvm_irqfd_release+0xdd/0x120 [ 24.664708] ? kvm_irqfd_release+0xdd/0x120 [ 24.668997] ? kvm_put_kvm+0xde0/0xde0 [ 24.672867] kvm_vm_release+0x42/0x50 [ 24.676636] __fput+0x333/0x7f0 [ 24.679884] ? fput+0x140/0x140 [ 24.683140] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.688992] ____fput+0x15/0x20 [ 24.692241] task_work_run+0x199/0x270 [ 24.696097] ? task_work_cancel+0x210/0x210 [ 24.700384] ? free_nsproxy+0x185/0x1f0 [ 24.704323] ? switch_task_namespaces+0xa2/0xc0 [ 24.708960] do_exit+0x9bb/0x1ae0 [ 24.712382] ? hrtimer_try_to_cancel+0x51/0x5c0 [ 24.717026] ? mm_update_next_owner+0x930/0x930 [ 24.721660] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 24.726558] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.732405] ? _do_fork+0x2ae/0xf10 [ 24.736016] ? rcu_note_context_switch+0x710/0x710 [ 24.740918] ? fork_idle+0x2d0/0x2d0 [ 24.744599] ? __might_sleep+0x95/0x190 [ 24.748546] ? do_nanosleep+0x4fc/0x6e0 [ 24.752507] ? schedule_timeout_idle+0x90/0x90 [ 24.757065] ? memset+0x31/0x40 [ 24.760315] ? hrtimer_nanosleep+0x2cc/0x860 [ 24.764701] ? nanosleep_copyout+0x100/0x100 [ 24.769074] ? __might_sleep+0x95/0x190 [ 24.773024] ? kasan_check_write+0x14/0x20 [ 24.777227] ? _copy_from_user+0x99/0x110 [ 24.781351] ? __hrtimer_init+0x140/0x140 [ 24.785467] ? syscall_return_slowpath+0x550/0x550 [ 24.790366] do_group_exit+0x149/0x400 [ 24.794222] ? SyS_exit+0x30/0x30 [ 24.797646] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.802631] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.807354] SyS_exit_group+0x1d/0x20 [ 24.811125] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 24.815848] RIP: 0033:0x448fe9 [ 24.819009] RSP: 002b:00007ffd0dbc3298 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7 [ 24.826696] RAX: ffffffffffffffda RBX: 00007f95e9458700 RCX: 0000000000448fe9 [ 24.833930] RDX: 0000000000474171 RSI: 0000000000000000 RDI: 0000000000000001 [ 24.841165] RBP: 00007ffd0dbc3240 R08: 00000000006dd1c0 R09: 0000000000000000 [ 24.848402] R10: 00000000006dd144 R11: 0000000000000206 R12: 0000000000000000 [ 24.855639] R13: 00007ffd0dbc323f R14: 00007f95e94589c0 R15: 0000000000000000 [ 24.862882] 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 [ 24.881963] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c40ef5a0 [ 24.888086] ---[ end trace ac52279ab9dd4098 ]--- [ 24.892807] Kernel panic - not syncing: Fatal exception [ 24.898596] Dumping ftrace buffer: [ 24.902117] (ftrace buffer empty) [ 24.905798] Kernel Offset: disabled [ 24.909393] Rebooting in 86400 seconds..