[....] Starting enhanced syslogd: rsyslogd[ 12.009200] audit: type=1400 audit(1513531701.887:5): avc: denied { syslog } for pid=2992 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: [ 19.122116] audit: type=1400 audit(1513531709.000:6): avc: denied { map } for pid=3132 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-6,10.128.0.34' (ECDSA) to the list of known hosts. executing program executing program [ 25.422460] audit: type=1400 audit(1513531715.301:7): avc: denied { map } for pid=3146 comm="syzkaller386638" path="/root/syzkaller386638432" 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 [ 25.479577] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu executing program executing program executing program executing program [ 25.977765] kasan: CONFIG_KASAN_INLINE enabled [ 25.982407] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 25.989741] general protection fault: 0000 [#1] SMP KASAN [ 25.995245] Dumping ftrace buffer: [ 25.998751] (ftrace buffer empty) [ 26.002429] Modules linked in: [ 26.005592] CPU: 1 PID: 3202 Comm: syzkaller386638 Not tainted 4.15.0-rc2-mm1+ #39 [ 26.013263] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.022600] RIP: 0010:native_write_cr4+0x4/0x10 [ 26.027234] RSP: 0018:ffff8801c4faf5a0 EFLAGS: 00010093 [ 26.032563] RAX: ffff8801c2b84440 RBX: 00000000001606e0 RCX: ffffffff811a2d22 [ 26.039810] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 26.047052] RBP: ffff8801c4faf5a0 R08: ffff8801c4faf150 R09: ffff8801c2b84440 [ 26.054298] R10: ffff8801c4faf510 R11: ffffed00389f5e2c R12: 0000000000000093 [ 26.061544] R13: ffff8801c2b84440 R14: ffff8801db31a130 R15: ffff8801db31a130 [ 26.068792] FS: 0000000000a8a880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 26.076984] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.082831] CR2: 00007f2828c4e2a0 CR3: 0000000006225005 CR4: 00000000001626e0 [ 26.090076] Call Trace: [ 26.092637] hardware_disable+0x34a/0x4b0 [ 26.096755] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 26.101238] kvm_arch_hardware_disable+0x35/0xd0 [ 26.105962] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 26.110424] hardware_disable_nolock+0x30/0x40 [ 26.114970] on_each_cpu+0xca/0x1b0 [ 26.118579] hardware_disable_all_nolock+0x3e/0x50 [ 26.123474] kvm_put_kvm+0x956/0xde0 [ 26.127159] ? kvm_clear_guest+0xb0/0xb0 [ 26.131189] ? lock_downgrade+0x980/0x980 [ 26.135315] ? do_raw_spin_trylock+0x190/0x190 [ 26.139873] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.144342] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.149331] ? kvm_irqfd_release+0xdd/0x120 [ 26.153624] ? kvm_irqfd_release+0xdd/0x120 [ 26.157915] ? kvm_put_kvm+0xde0/0xde0 [ 26.161773] kvm_vm_release+0x42/0x50 [ 26.165550] __fput+0x333/0x7f0 [ 26.168810] ? fput+0x140/0x140 [ 26.172070] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 26.177931] ? _raw_spin_unlock_irq+0x27/0x70 [ 26.182407] ____fput+0x15/0x20 [ 26.185659] task_work_run+0x199/0x270 [ 26.189518] ? task_work_cancel+0x210/0x210 [ 26.193826] ? _raw_spin_unlock+0x22/0x30 [ 26.197946] ? switch_task_namespaces+0x87/0xc0 [ 26.202590] do_exit+0x9bb/0x1ae0 [ 26.206021] ? hrtimer_try_to_cancel+0x51/0x5c0 [ 26.210662] ? mm_update_next_owner+0x930/0x930 [ 26.215306] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 26.220209] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 26.226058] ? _do_fork+0x2ae/0xf10 [ 26.229668] ? rcu_note_context_switch+0x710/0x710 [ 26.234567] ? fork_idle+0x2d0/0x2d0 [ 26.238255] ? __might_sleep+0x95/0x190 [ 26.242201] ? do_nanosleep+0x4fc/0x6e0 [ 26.246143] ? schedule_timeout_idle+0x90/0x90 [ 26.250699] ? memset+0x31/0x40 [ 26.253956] ? hrtimer_nanosleep+0x2cc/0x860 [ 26.258340] ? nanosleep_copyout+0x100/0x100 [ 26.262721] ? __might_sleep+0x95/0x190 [ 26.266673] ? kasan_check_write+0x14/0x20 [ 26.270888] ? _copy_from_user+0x99/0x110 [ 26.275016] ? __hrtimer_init+0x140/0x140 [ 26.279141] ? syscall_return_slowpath+0x550/0x550 [ 26.284044] do_group_exit+0x149/0x400 [ 26.287901] ? SyS_exit+0x30/0x30 [ 26.291321] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.296304] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 26.301034] SyS_exit_group+0x1d/0x20 [ 26.304805] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 26.309539] RIP: 0033:0x448ff9 [ 26.312696] RSP: 002b:00007ffeef4b1788 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7 [ 26.320369] RAX: ffffffffffffffda RBX: 00007f282844f700 RCX: 0000000000448ff9 [ 26.327610] RDX: 0000000000474191 RSI: 0000000000000000 RDI: 0000000000000000 [ 26.334848] RBP: 00007ffeef4b1730 R08: 00000000006dd1c0 R09: 0000000000000000 [ 26.342086] R10: 00000000006dd144 R11: 0000000000000206 R12: 0000000000000000 [ 26.349343] R13: 00007ffeef4b172f R14: 00007f282844f9c0 R15: 0000000000000000 [ 26.356589] 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 [ 26.375659] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c4faf5a0 [ 26.381780] ---[ end trace 7777acedb667edf5 ]--- [ 26.386500] Kernel panic - not syncing: Fatal exception [ 26.391864] Dumping ftrace buffer: [ 26.395371] (ftrace buffer empty) [ 26.399045] Kernel Offset: disabled [ 26.402636] Rebooting in 86400 seconds..