[....] Starting enhanced syslogd: rsyslogd[ 10.653524] audit: type=1400 audit(1514205910.188:5): avc: denied { syslog } for pid=2994 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: [ 16.478763] audit: type=1400 audit(1514205916.013:6): avc: denied { map } for pid=3134 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-6,10.128.15.202' (ECDSA) to the list of known hosts. executing program [ 41.714265] audit: type=1400 audit(1514205941.248:7): avc: denied { map } for pid=3152 comm="syzkaller437062" path="/root/syzkaller437062025" 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 [ 41.740216] audit: type=1400 audit(1514205941.252:8): avc: denied { sys_admin } for pid=3152 comm="syzkaller437062" capability=21 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 [ 41.766537] audit: type=1400 audit(1514205941.301:9): avc: denied { sys_chroot } for pid=3153 comm="syzkaller437062" capability=18 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 [ 41.799586] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 41.853293] kasan: CONFIG_KASAN_INLINE enabled [ 41.857919] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 41.865249] general protection fault: 0000 [#1] SMP KASAN [ 41.870751] Dumping ftrace buffer: [ 41.874267] (ftrace buffer empty) [ 41.877947] Modules linked in: [ 41.881108] CPU: 0 PID: 3154 Comm: syzkaller437062 Not tainted 4.15.0-rc4-mm1+ #49 [ 41.888778] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.898110] RIP: 0010:native_write_cr4+0x4/0x10 [ 41.902742] RSP: 0018:ffff8801c8b57058 EFLAGS: 00010093 [ 41.908077] RAX: ffff8801c960c340 RBX: 00000000001606f0 RCX: ffffffff811a4922 [ 41.915318] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 41.922553] RBP: ffff8801c8b57058 R08: 1ffff1003916ad67 R09: 0000000000000004 [ 41.929794] R10: ffff8801c8b56fc8 R11: 0000000000000004 R12: 0000000000000093 [ 41.937044] R13: ffff8801c960c340 R14: ffff8801db21a130 R15: ffff8801db21a130 [ 41.944282] FS: 00007f6c6bd9b700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 41.952474] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.958330] CR2: 0000000000000000 CR3: 0000000006422003 CR4: 00000000001626f0 [ 41.965576] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.972820] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.980066] Call Trace: [ 41.982626] hardware_disable+0x34a/0x4b0 [ 41.986745] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 41.991206] kvm_arch_hardware_disable+0x35/0xd0 [ 41.995927] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 42.000400] hardware_disable_nolock+0x30/0x40 [ 42.004949] on_each_cpu+0xca/0x1b0 [ 42.008542] hardware_disable_all_nolock+0x3e/0x50 [ 42.013436] kvm_put_kvm+0x956/0xde0 [ 42.017130] ? kvm_clear_guest+0xb0/0xb0 [ 42.021159] ? kvm_irqfd_release+0xd1/0x120 [ 42.025447] ? lock_downgrade+0x980/0x980 [ 42.029567] ? _raw_spin_unlock_irq+0x27/0x70 [ 42.034031] ? kvm_irqfd_release+0xdd/0x120 [ 42.038317] ? kvm_irqfd_release+0xdd/0x120 [ 42.042603] ? kvm_put_kvm+0xde0/0xde0 [ 42.046455] kvm_vm_release+0x42/0x50 [ 42.050239] __fput+0x327/0x7e0 [ 42.053485] ? fput+0x140/0x140 [ 42.056741] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 42.062594] ____fput+0x15/0x20 [ 42.065842] task_work_run+0x199/0x270 [ 42.069696] ? task_work_cancel+0x210/0x210 [ 42.073982] ? free_nsproxy+0x185/0x1f0 [ 42.077923] ? switch_task_namespaces+0xa2/0xc0 [ 42.082559] do_exit+0x9bb/0x1ad0 [ 42.085976] ? check_noncircular+0x20/0x20 [ 42.090179] ? mm_update_next_owner+0x930/0x930 [ 42.094814] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 42.099969] ? __might_sleep+0x95/0x190 [ 42.103911] ? find_held_lock+0x35/0x1d0 [ 42.107940] ? futex_wait+0x402/0x9a0 [ 42.111713] ? lock_downgrade+0x980/0x980 [ 42.115834] ? __unqueue_futex+0x1c0/0x290 [ 42.120039] ? lock_release+0xa40/0xa40 [ 42.123978] ? fault_in_user_writeable+0x90/0x90 [ 42.128699] ? do_raw_spin_trylock+0x190/0x190 [ 42.133247] ? check_noncircular+0x20/0x20 [ 42.137451] ? drop_futex_key_refs.isra.12+0x63/0xa0 [ 42.142517] ? futex_wait+0x6a9/0x9a0 [ 42.146289] ? find_held_lock+0x35/0x1d0 [ 42.150320] ? get_signal+0x7ae/0x16c0 [ 42.154174] ? lock_downgrade+0x980/0x980 [ 42.158292] do_group_exit+0x149/0x400 [ 42.162146] ? do_raw_spin_trylock+0x190/0x190 [ 42.166693] ? SyS_exit+0x30/0x30 [ 42.170112] ? _raw_spin_unlock_irq+0x27/0x70 [ 42.174574] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.179559] get_signal+0x73f/0x16c0 [ 42.183241] ? ptrace_notify+0x130/0x130 [ 42.187270] ? exit_robust_list+0x240/0x240 [ 42.191556] ? find_held_lock+0x35/0x1d0 [ 42.195585] ? __fget+0x333/0x570 [ 42.199004] ? lock_downgrade+0x980/0x980 [ 42.203125] do_signal+0x94/0x1ee0 [ 42.206639] ? __lock_is_held+0xb6/0x140 [ 42.210669] ? setup_sigcontext+0x7d0/0x7d0 [ 42.214955] ? __fget+0x35c/0x570 [ 42.218376] ? iterate_fd+0x3f0/0x3f0 [ 42.222141] ? put_unused_fd+0x62/0x70 [ 42.225996] ? lock_downgrade+0x980/0x980 [ 42.230117] ? exit_to_usermode_loop+0x8c/0x2f0 [ 42.234755] exit_to_usermode_loop+0x258/0x2f0 [ 42.239302] ? __fget_light+0x297/0x380 [ 42.243242] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 42.248745] ? selinux_capable+0x40/0x40 [ 42.252778] syscall_return_slowpath+0x490/0x550 [ 42.257498] ? prepare_exit_to_usermode+0x340/0x340 [ 42.262488] ? entry_SYSCALL_64_fastpath+0x69/0x96 [ 42.267384] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 42.272366] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 42.277090] entry_SYSCALL_64_fastpath+0x94/0x96 [ 42.281809] RIP: 0033:0x449559 [ 42.284964] RSP: 002b:00007f6c6bd9ada8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 42.292636] RAX: fffffffffffffe00 RBX: 00000000006f0024 RCX: 0000000000449559 [ 42.299878] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000006f0024 [ 42.307114] RBP: 00000000006f0020 R08: 0000000000000000 R09: 0000000000000000 [ 42.314349] R10: 0000000000000000 R11: 0000000000000246 R12: 78756e696c65732f [ 42.321584] R13: 6d766b2f7665642f R14: 007375746174732f R15: 0000000000000017 [ 42.328824] 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 [ 42.347885] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c8b57058 [ 42.353997] ---[ end trace 9172940eea804c35 ]--- [ 42.358735] Kernel panic - not syncing: Fatal exception [ 42.364091] Dumping ftrace buffer: [ 42.367595] (ftrace buffer empty) [ 42.371272] Kernel Offset: disabled [ 42.374868] Rebooting in 86400 seconds..