[....] Starting enhanced syslogd: rsyslogd[ 12.481180] audit: type=1400 audit(1513713640.577:5): avc: denied { syslog } for pid=2990 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 19.639839] audit: type=1400 audit(1513713647.736:6): avc: denied { map } for pid=3129 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-7,10.128.15.227' (ECDSA) to the list of known hosts. executing program [ 49.928035] audit: type=1400 audit(1513713678.024:7): avc: denied { map } for pid=3146 comm="syzkaller860602" path="/root/syzkaller860602616" 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 [ 49.998542] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu executing program executing program executing program executing program [ 50.564746] kasan: CONFIG_KASAN_INLINE enabled [ 50.569391] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 50.576731] general protection fault: 0000 [#1] SMP KASAN [ 50.582237] Dumping ftrace buffer: [ 50.585743] (ftrace buffer empty) [ 50.589419] Modules linked in: [ 50.592586] CPU: 1 PID: 3199 Comm: syzkaller860602 Not tainted 4.15.0-rc2-mm1+ #39 [ 50.600255] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.609589] RIP: 0010:native_write_cr4+0x4/0x10 [ 50.614221] RSP: 0018:ffff8801c51ff5a0 EFLAGS: 00010093 [ 50.619547] RAX: ffff8801c44ca240 RBX: 00000000001606e0 RCX: ffffffff811a2d22 [ 50.626792] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 50.634028] RBP: ffff8801c51ff5a0 R08: ffff8801c51ff150 R09: ffff8801c44ca240 [ 50.641263] R10: ffff8801c51ff510 R11: ffffed0038a3fe2c R12: 0000000000000093 [ 50.648499] R13: ffff8801c44ca240 R14: ffff8801db31a130 R15: ffff8801db31a130 [ 50.655736] FS: 0000000001c71880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 50.663927] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 50.669772] CR2: 00007fbb5d3c3000 CR3: 0000000006225001 CR4: 00000000001626e0 [ 50.677017] Call Trace: [ 50.679574] hardware_disable+0x34a/0x4b0 [ 50.684908] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 50.689371] kvm_arch_hardware_disable+0x35/0xd0 [ 50.694091] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 50.698551] hardware_disable_nolock+0x30/0x40 [ 50.703097] on_each_cpu+0xca/0x1b0 [ 50.706690] hardware_disable_all_nolock+0x3e/0x50 [ 50.711583] kvm_put_kvm+0x956/0xde0 [ 50.715264] ? kvm_clear_guest+0xb0/0xb0 [ 50.719295] ? lock_downgrade+0x980/0x980 [ 50.723419] ? do_raw_spin_trylock+0x190/0x190 [ 50.727982] ? _raw_spin_unlock_irq+0x27/0x70 [ 50.732441] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 50.737424] ? kvm_irqfd_release+0xdd/0x120 [ 50.741707] ? kvm_irqfd_release+0xdd/0x120 [ 50.745993] ? kvm_put_kvm+0xde0/0xde0 [ 50.749845] kvm_vm_release+0x42/0x50 [ 50.753611] __fput+0x333/0x7f0 [ 50.756856] ? fput+0x140/0x140 [ 50.760099] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 50.765944] ? _raw_spin_unlock_irq+0x27/0x70 [ 50.770419] ____fput+0x15/0x20 [ 50.773665] task_work_run+0x199/0x270 [ 50.777520] ? task_work_cancel+0x210/0x210 [ 50.781821] ? _raw_spin_unlock+0x22/0x30 [ 50.785937] ? switch_task_namespaces+0x87/0xc0 [ 50.790577] do_exit+0x9bb/0x1ae0 [ 50.794003] ? hrtimer_try_to_cancel+0x51/0x5c0 [ 50.798653] ? mm_update_next_owner+0x930/0x930 [ 50.803299] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 50.808196] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 50.814042] ? _do_fork+0x2ae/0xf10 [ 50.817634] ? rcu_note_context_switch+0x710/0x710 [ 50.822531] ? fork_idle+0x2d0/0x2d0 [ 50.826211] ? __might_sleep+0x95/0x190 [ 50.830157] ? do_nanosleep+0x4fc/0x6e0 [ 50.834098] ? schedule_timeout_idle+0x90/0x90 [ 50.838654] ? memset+0x31/0x40 [ 50.841910] ? hrtimer_nanosleep+0x2cc/0x860 [ 50.846286] ? nanosleep_copyout+0x100/0x100 [ 50.850660] ? __might_sleep+0x95/0x190 [ 50.854603] ? kasan_check_write+0x14/0x20 [ 50.858804] ? _copy_from_user+0x99/0x110 [ 50.862926] ? __hrtimer_init+0x140/0x140 [ 50.867045] ? syscall_return_slowpath+0x550/0x550 [ 50.871942] do_group_exit+0x149/0x400 [ 50.875795] ? SyS_exit+0x30/0x30 [ 50.879217] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 50.884214] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 50.888941] SyS_exit_group+0x1d/0x20 [ 50.892709] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 50.897428] RIP: 0033:0x4461e9 [ 50.900584] RSP: 002b:00007fff7efb7128 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7 [ 50.908254] RAX: ffffffffffffffda RBX: 00007fab284ec700 RCX: 00000000004461e9 [ 50.915490] RDX: 0000000000471bb1 RSI: 0000000000000000 RDI: 0000000000000000 [ 50.922726] RBP: 00007fff7efb70d0 R08: 00000000006da1c0 R09: 0000000000000000 [ 50.930047] R10: 00000000006da144 R11: 0000000000000206 R12: 0000000000000000 [ 50.937282] R13: 00007fff7efb70cf R14: 00007fab284ec9c0 R15: 0000000000000000 [ 50.944525] 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 [ 50.963591] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c51ff5a0 [ 50.969705] ---[ end trace 9c22cba61b5bea13 ]--- [ 50.974425] Kernel panic - not syncing: Fatal exception [ 50.980141] Dumping ftrace buffer: [ 50.983647] (ftrace buffer empty) [ 50.987324] Kernel Offset: disabled [ 50.990917] Rebooting in 86400 seconds..