[ 12.831627] audit: type=1400 audit(1513556172.261:5): avc: denied { syslog } for pid=2988 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [....] Starting enhanced syslogd: rsyslogd[?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: [ 17.714628] audit: type=1400 audit(1513556177.144:6): avc: denied { map } for pid=3131 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-4,10.128.15.210' (ECDSA) to the list of known hosts. [ 23.977740] audit: type=1400 audit(1513556183.407:7): avc: denied { map } for pid=3145 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 2017/12/18 00:16:23 parsed 1 programs 2017/12/18 00:16:23 executed programs: 0 [ 24.102316] audit: type=1400 audit(1513556183.532:8): avc: denied { map } for pid=3145 comm="syz-execprog" path="/root/syzkaller-shm156578629" 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 [ 24.145593] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 24.167963] kasan: CONFIG_KASAN_INLINE enabled [ 24.172588] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.179930] general protection fault: 0000 [#1] SMP KASAN [ 24.185432] Dumping ftrace buffer: [ 24.188934] (ftrace buffer empty) [ 24.192609] Modules linked in: [ 24.195778] CPU: 0 PID: 3155 Comm: syz-executor0 Not tainted 4.15.0-rc2-mm1+ #39 [ 24.203278] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.212608] RIP: 0010:native_write_cr4+0x4/0x10 [ 24.217241] RSP: 0018:ffff8801c4c47058 EFLAGS: 00010093 [ 24.222572] RAX: ffff8801c782c2c0 RBX: 00000000001606f0 RCX: ffffffff811a2d22 [ 24.229812] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606f0 [ 24.237048] RBP: ffff8801c4c47058 R08: ffff8801c4c46c08 R09: ffff8801c782c2c0 [ 24.244370] R10: ffff8801c4c46fc8 R11: ffffed0038988d83 R12: 0000000000000093 [ 24.251608] R13: ffff8801c782c2c0 R14: ffff8801db21a130 R15: ffff8801db21a130 [ 24.258848] FS: 00007f15624e8700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 24.267036] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.272880] CR2: 0000000000000000 CR3: 0000000006225002 CR4: 00000000001626f0 [ 24.280116] Call Trace: [ 24.282673] hardware_disable+0x34a/0x4b0 [ 24.286787] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 24.291248] kvm_arch_hardware_disable+0x35/0xd0 [ 24.295968] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 24.300426] hardware_disable_nolock+0x30/0x40 [ 24.304974] on_each_cpu+0xca/0x1b0 [ 24.308566] hardware_disable_all_nolock+0x3e/0x50 [ 24.313462] kvm_put_kvm+0x956/0xde0 [ 24.317148] ? kvm_clear_guest+0xb0/0xb0 [ 24.321177] ? lock_downgrade+0x980/0x980 [ 24.325299] ? do_raw_spin_trylock+0x190/0x190 [ 24.329848] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.334312] ? kvm_irqfd_release+0xdd/0x120 [ 24.338599] ? kvm_irqfd_release+0xdd/0x120 [ 24.342887] ? kvm_put_kvm+0xde0/0xde0 [ 24.346738] kvm_vm_release+0x42/0x50 [ 24.350505] __fput+0x333/0x7f0 [ 24.353750] ? fput+0x140/0x140 [ 24.356996] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.362852] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.367316] ____fput+0x15/0x20 [ 24.370562] task_work_run+0x199/0x270 [ 24.374419] ? task_work_cancel+0x210/0x210 [ 24.378708] ? _raw_spin_unlock+0x22/0x30 [ 24.382822] ? switch_task_namespaces+0x87/0xc0 [ 24.387458] do_exit+0x9bb/0x1ae0 [ 24.390877] ? __lock_acquire+0x324e/0x47f0 [ 24.395166] ? mm_update_next_owner+0x930/0x930 [ 24.399805] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 24.404961] ? check_noncircular+0x20/0x20 [ 24.409166] ? check_noncircular+0x20/0x20 [ 24.413369] ? check_noncircular+0x20/0x20 [ 24.417568] ? find_held_lock+0x39/0x1d0 [ 24.421598] ? lock_downgrade+0x980/0x980 [ 24.425717] ? kprobe_flush_task+0xe3/0x5d0 [ 24.430011] ? find_held_lock+0x39/0x1d0 [ 24.434048] ? lock_downgrade+0x980/0x980 [ 24.438162] ? recalc_sigpending_tsk+0x150/0x150 [ 24.442883] ? get_signal+0x2b2/0x16c0 [ 24.446741] do_group_exit+0x149/0x400 [ 24.450594] ? do_raw_spin_trylock+0x190/0x190 [ 24.455142] ? SyS_exit+0x30/0x30 [ 24.458562] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.463029] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.468017] get_signal+0x73f/0x16c0 [ 24.471709] ? ptrace_notify+0x130/0x130 [ 24.475743] ? __schedule+0x8f3/0x2060 [ 24.479596] ? exit_robust_list+0x240/0x240 [ 24.483884] ? __sched_text_start+0x8/0x8 [ 24.487996] ? lock_downgrade+0x980/0x980 [ 24.492116] ? __fget+0xbb/0x580 [ 24.495452] do_signal+0x94/0x1ee0 [ 24.498960] ? __lock_is_held+0xbc/0x140 [ 24.502987] ? setup_sigcontext+0x7d0/0x7d0 [ 24.507275] ? user_return_notifier_unregister+0x23d/0x360 [ 24.512873] ? schedule+0xf5/0x430 [ 24.516382] ? __schedule+0x2060/0x2060 [ 24.520324] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.525303] ? trace_hardirqs_on+0xd/0x10 [ 24.529421] ? kvm_on_user_return+0x286/0x3c0 [ 24.533888] ? exit_to_usermode_loop+0x8c/0x2f0 [ 24.538524] exit_to_usermode_loop+0x258/0x2f0 [ 24.543068] ? ioctl_preallocate+0x2b0/0x2b0 [ 24.547444] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 24.552950] ? selinux_capable+0x40/0x40 [ 24.556981] syscall_return_slowpath+0x490/0x550 [ 24.561702] ? prepare_exit_to_usermode+0x340/0x340 [ 24.566682] ? entry_SYSCALL_64_fastpath+0x69/0x96 [ 24.571575] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.576556] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.581279] entry_SYSCALL_64_fastpath+0x94/0x96 [ 24.585999] RIP: 0033:0x452a09 [ 24.589160] RSP: 002b:00007f15624e7c88 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 24.596833] RAX: 0000000000000001 RBX: 000000000071bea0 RCX: 0000000000452a09 [ 24.604069] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000000071becc [ 24.611305] RBP: 000000000000021e R08: 0000000000000000 R09: 0000000000000000 [ 24.618541] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006f0370 [ 24.625777] R13: 00000000ffffffff R14: 00007f15624e86d4 R15: 0000000000000000 [ 24.633024] 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 [ 24.652097] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c4c47058 [ 24.658211] ---[ end trace d3a50a47197bcc51 ]--- [ 24.662928] Kernel panic - not syncing: Fatal exception [ 24.668689] Dumping ftrace buffer: [ 24.672193] (ftrace buffer empty) [ 24.675866] Kernel Offset: disabled [ 24.679455] Rebooting in 86400 seconds..