[....] Starting enhanced syslogd: rsyslogd[ 12.854200] audit: type=1400 audit(1513527138.579:5): avc: denied { syslog } for pid=2997 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: [ 19.072234] audit: type=1400 audit(1513527144.797:6): avc: denied { map } for pid=3137 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-5,10.128.0.33' (ECDSA) to the list of known hosts. [ 25.323481] audit: type=1400 audit(1513527151.048:7): avc: denied { map } for pid=3151 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=16479 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2017/12/17 16:12:31 parsed 1 programs 2017/12/17 16:12:31 executed programs: 0 [ 25.463812] audit: type=1400 audit(1513527151.188:8): avc: denied { map } for pid=3151 comm="syz-execprog" path="/root/syzkaller-shm780074880" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 [ 25.594253] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 25.645316] kasan: CONFIG_KASAN_INLINE enabled [ 25.649969] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 25.657310] general protection fault: 0000 [#1] SMP KASAN [ 25.662817] Dumping ftrace buffer: [ 25.666321] (ftrace buffer empty) [ 25.670000] Modules linked in: [ 25.673173] CPU: 0 PID: 3178 Comm: syz-executor0 Not tainted 4.15.0-rc2-mm1+ #39 [ 25.680672] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.690003] RIP: 0010:native_write_cr4+0x4/0x10 [ 25.694642] RSP: 0018:ffff8801c456f058 EFLAGS: 00010093 [ 25.699972] RAX: ffff8801c4d86580 RBX: 00000000001606f0 RCX: ffffffff811a2d22 [ 25.707207] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 25.714445] RBP: ffff8801c456f058 R08: ffff8801c456ec08 R09: ffff8801c4d86580 [ 25.721694] R10: ffff8801c456efc8 R11: ffffed00388add83 R12: 0000000000000093 [ 25.728930] R13: ffff8801c4d86580 R14: ffff8801db21a130 R15: ffff8801db21a130 [ 25.736171] FS: 00007f54d2e9b700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 25.744366] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.750217] CR2: 0000000000000000 CR3: 0000000006225005 CR4: 00000000001626f0 [ 25.757462] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.764703] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.771939] Call Trace: [ 25.774514] hardware_disable+0x34a/0x4b0 [ 25.778633] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 25.783100] kvm_arch_hardware_disable+0x35/0xd0 [ 25.787832] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 25.792294] hardware_disable_nolock+0x30/0x40 [ 25.796846] on_each_cpu+0xca/0x1b0 [ 25.800441] hardware_disable_all_nolock+0x3e/0x50 [ 25.805346] kvm_put_kvm+0x956/0xde0 [ 25.809037] ? kvm_clear_guest+0xb0/0xb0 [ 25.813070] ? lock_downgrade+0x980/0x980 [ 25.817196] ? do_raw_spin_trylock+0x190/0x190 [ 25.821747] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.826211] ? kvm_irqfd_release+0xdd/0x120 [ 25.830498] ? kvm_irqfd_release+0xdd/0x120 [ 25.834785] ? kvm_put_kvm+0xde0/0xde0 [ 25.838638] kvm_vm_release+0x42/0x50 [ 25.842405] __fput+0x333/0x7f0 [ 25.845654] ? fput+0x140/0x140 [ 25.848901] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.854762] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.859227] ____fput+0x15/0x20 [ 25.862476] task_work_run+0x199/0x270 [ 25.866332] ? task_work_cancel+0x210/0x210 [ 25.870621] ? _raw_spin_unlock+0x22/0x30 [ 25.874737] ? switch_task_namespaces+0x87/0xc0 [ 25.879376] do_exit+0x9bb/0x1ae0 [ 25.882800] ? mm_update_next_owner+0x930/0x930 [ 25.887450] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 25.892614] ? lock_downgrade+0x980/0x980 [ 25.896732] ? futex_wait+0x3ad/0x990 [ 25.900501] ? __unqueue_futex+0x1c0/0x290 [ 25.904711] ? lock_release+0xda0/0xda0 [ 25.908658] ? fault_in_user_writeable+0x90/0x90 [ 25.913386] ? check_noncircular+0x20/0x20 [ 25.917588] ? do_raw_spin_trylock+0x190/0x190 [ 25.922136] ? futex_wake+0x680/0x680 [ 25.925902] ? lock_downgrade+0x980/0x980 [ 25.930024] ? mmdrop+0x18/0x30 [ 25.933274] ? drop_futex_key_refs.isra.13+0x63/0xa0 [ 25.938343] ? futex_wait+0x69e/0x990 [ 25.942115] ? find_held_lock+0x39/0x1d0 [ 25.946147] ? lock_downgrade+0x980/0x980 [ 25.950270] ? recalc_sigpending_tsk+0x150/0x150 [ 25.954993] ? get_signal+0x2b2/0x16c0 [ 25.958857] do_group_exit+0x149/0x400 [ 25.962720] ? do_raw_spin_trylock+0x190/0x190 [ 25.967268] ? SyS_exit+0x30/0x30 [ 25.970689] ? _raw_spin_unlock_irq+0x27/0x70 [ 25.975153] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.980139] get_signal+0x73f/0x16c0 [ 25.983827] ? ptrace_notify+0x130/0x130 [ 25.987859] ? __kvm_gfn_to_hva_cache_init+0xbb0/0xbb0 [ 25.993112] ? exit_robust_list+0x240/0x240 [ 25.997406] ? lock_downgrade+0x980/0x980 [ 26.001524] ? __fget+0xbb/0x580 [ 26.004869] do_signal+0x94/0x1ee0 [ 26.008383] ? __lock_is_held+0xbc/0x140 [ 26.012414] ? setup_sigcontext+0x7d0/0x7d0 [ 26.016706] ? __fget+0x362/0x580 [ 26.020132] ? iterate_fd+0x3f0/0x3f0 [ 26.023902] ? lock_downgrade+0x980/0x980 [ 26.028021] ? lock_acquire+0x1d5/0x580 [ 26.031967] ? exit_to_usermode_loop+0x8c/0x2f0 [ 26.036606] exit_to_usermode_loop+0x258/0x2f0 [ 26.041158] ? ioctl_preallocate+0x2b0/0x2b0 [ 26.045540] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 26.051046] ? selinux_capable+0x40/0x40 [ 26.055080] syscall_return_slowpath+0x490/0x550 [ 26.059803] ? prepare_exit_to_usermode+0x340/0x340 [ 26.064788] ? entry_SYSCALL_64_fastpath+0x69/0x96 [ 26.069700] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 26.074693] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 26.079423] entry_SYSCALL_64_fastpath+0x94/0x96 [ 26.084144] RIP: 0033:0x452a09 [ 26.087303] RSP: 002b:00007f54d2e9ace8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 26.094982] RAX: fffffffffffffe00 RBX: 000000000071c038 RCX: 0000000000452a09 [ 26.102219] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000071c038 [ 26.109463] RBP: 000000000071c038 R08: 0000000000000000 R09: 000000000071c010 [ 26.116701] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 26.123938] R13: 00007ffdb81ca5cf R14: 00007f54d2e9b9c0 R15: 000000000000000e [ 26.131182] 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 [ 26.150254] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c456f058 [ 26.156370] ---[ end trace 97449c94c8d91d46 ]--- [ 26.161090] Kernel panic - not syncing: Fatal exception [ 26.166863] Dumping ftrace buffer: [ 26.170372] (ftrace buffer empty) [ 26.174046] Kernel Offset: disabled [ 26.177640] Rebooting in 86400 seconds..