[....] Starting enhanced syslogd: rsyslogd[ 12.327790] audit: type=1400 audit(1513545915.850:5): avc: denied { syslog } for pid=2993 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: [ 19.113325] audit: type=1400 audit(1513545922.635:6): avc: denied { map } for pid=3135 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-3,10.128.0.11' (ECDSA) to the list of known hosts. executing program [ 25.535613] audit: type=1400 audit(1513545929.058:7): avc: denied { map } for pid=3149 comm="syzkaller759071" path="/root/syzkaller759071511" 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 [ 25.578390] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 25.702560] kasan: CONFIG_KASAN_INLINE enabled [ 25.707192] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 25.714526] general protection fault: 0000 [#1] SMP KASAN [ 25.720034] Dumping ftrace buffer: [ 25.723803] (ftrace buffer empty) [ 25.727481] Modules linked in: [ 25.730641] CPU: 1 PID: 3150 Comm: syzkaller759071 Not tainted 4.15.0-rc2-mm1+ #39 [ 25.738310] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.747639] RIP: 0010:native_write_cr4+0x4/0x10 [ 25.752271] RSP: 0018:ffff8801c4d6f5a0 EFLAGS: 00010093 [ 25.757607] RAX: ffff8801c4d802c0 RBX: 00000000001606e0 RCX: ffffffff811a2d22 [ 25.764843] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 25.772080] RBP: ffff8801c4d6f5a0 R08: ffff8801c4d6f150 R09: ffff8801c4d802c0 [ 25.779318] R10: ffff8801c4d6f510 R11: ffffed00389ade2c R12: 0000000000000093 [ 25.786556] R13: ffff8801c4d802c0 R14: ffff8801db31a130 R15: ffff8801db31a130 [ 25.793795] FS: 00000000025a2880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 25.801987] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.807866] CR2: 0000000000000000 CR3: 0000000006225003 CR4: 00000000001626e0 [ 25.815104] Call Trace: [ 25.817660] hardware_disable+0x34a/0x4b0 [ 25.821779] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 25.826244] kvm_arch_hardware_disable+0x35/0xd0 [ 25.830966] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 25.835425] hardware_disable_nolock+0x30/0x40 [ 25.839973] on_each_cpu+0xca/0x1b0 [ 25.843567] hardware_disable_all_nolock+0x3e/0x50 [ 25.848463] kvm_put_kvm+0x956/0xde0 [ 25.852147] ? kvm_clear_guest+0xb0/0xb0 [ 25.856176] ? lock_downgrade+0x980/0x980 [ 25.860298] ? do_raw_spin_trylock+0x190/0x190 [ 25.865376] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.869840] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.874824] ? kvm_irqfd_release+0xdd/0x120 [ 25.879110] ? kvm_irqfd_release+0xdd/0x120 [ 25.883397] ? kvm_put_kvm+0xde0/0xde0 [ 25.887248] kvm_vm_release+0x42/0x50 [ 25.891021] __fput+0x333/0x7f0 [ 25.894274] ? fput+0x140/0x140 [ 25.897519] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.903372] ____fput+0x15/0x20 [ 25.906618] task_work_run+0x199/0x270 [ 25.910475] ? task_work_cancel+0x210/0x210 [ 25.914764] ? free_nsproxy+0x185/0x1f0 [ 25.918705] ? switch_task_namespaces+0xa2/0xc0 [ 25.923341] do_exit+0x9bb/0x1ae0 [ 25.926765] ? hrtimer_try_to_cancel+0x51/0x5c0 [ 25.931401] ? mm_update_next_owner+0x930/0x930 [ 25.936036] ? __hrtimer_get_remaining+0x1c0/0x1c0 [ 25.940936] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.946787] ? _do_fork+0x2ae/0xf10 [ 25.950384] ? rcu_note_context_switch+0x710/0x710 [ 25.955283] ? fork_idle+0x2d0/0x2d0 [ 25.958966] ? __might_sleep+0x95/0x190 [ 25.962910] ? do_nanosleep+0x4fc/0x6e0 [ 25.966850] ? schedule_timeout_idle+0x90/0x90 [ 25.971406] ? memset+0x31/0x40 [ 25.974655] ? hrtimer_nanosleep+0x2cc/0x860 [ 25.979033] ? nanosleep_copyout+0x100/0x100 [ 25.983407] ? __might_sleep+0x95/0x190 [ 25.987352] ? kasan_check_write+0x14/0x20 [ 25.991554] ? _copy_from_user+0x99/0x110 [ 25.995670] ? __hrtimer_init+0x140/0x140 [ 25.999787] ? syscall_return_slowpath+0x550/0x550 [ 26.004686] do_group_exit+0x149/0x400 [ 26.008540] ? SyS_exit+0x30/0x30 [ 26.011959] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.016942] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 26.021665] SyS_exit_group+0x1d/0x20 [ 26.025436] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 26.030591] RIP: 0033:0x448869 [ 26.034964] RSP: 002b:00007fff5879fde8 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7 [ 26.042907] RAX: ffffffffffffffda RBX: 00007fb0a755d700 RCX: 0000000000448869 [ 26.050144] RDX: 00000000004740c1 RSI: 0000000000000000 RDI: 0000000000000001 [ 26.057381] RBP: 00007fff5879fd90 R08: 00000000006debc0 R09: 0000000000000000 [ 26.064619] R10: 00000000006deb44 R11: 0000000000000206 R12: 0000000000000000 [ 26.071856] R13: 00007fff5879fd8f R14: 00007fb0a755d9c0 R15: 0000000000000000 [ 26.079102] 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 [ 26.098606] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c4d6f5a0 [ 26.104718] ---[ end trace ef1ae8187123b673 ]--- [ 26.109437] Kernel panic - not syncing: Fatal exception [ 26.115578] Dumping ftrace buffer: [ 26.119083] (ftrace buffer empty) [ 26.122758] Kernel Offset: disabled [ 26.126350] Rebooting in 86400 seconds..