[....] Starting enhanced syslogd: rsyslogd[ 10.734694] audit: type=1400 audit(1514075939.913:5): avc: denied { syslog } for pid=2989 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 16.644993] audit: type=1400 audit(1514075945.823:6): avc: denied { map } for pid=3129 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-next-kasan-gce-5,10.128.15.239' (ECDSA) to the list of known hosts. [ 116.163337] audit: type=1400 audit(1514076045.342:7): avc: denied { map } for pid=3147 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 2017/12/24 00:40:45 parsed 1 programs 2017/12/24 00:40:45 executed programs: 0 [ 116.273265] audit: type=1400 audit(1514076045.452:8): avc: denied { map } for pid=3147 comm="syz-execprog" path="/root/syzkaller-shm317477239" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 [ 116.346190] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu 2017/12/24 00:40:50 executed programs: 242 2017/12/24 00:40:55 executed programs: 480 2017/12/24 00:41:00 executed programs: 715 2017/12/24 00:41:05 executed programs: 952 2017/12/24 00:41:10 executed programs: 1180 2017/12/24 00:41:15 executed programs: 1400 result: failed=false hanged=false err=executor 2: failed to read output coverage: record 0 call 0: expect syscall 923, got 971, executed 6 (cov: 0:nil|1:nil|2:nil|3:nil|4:nil|5:nil|) [ 150.731481] kasan: CONFIG_KASAN_INLINE enabled [ 150.736121] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 150.743451] general protection fault: 0000 [#1] SMP KASAN [ 150.748953] Dumping ftrace buffer: [ 150.752455] (ftrace buffer empty) [ 150.756133] Modules linked in: [ 150.759295] CPU: 1 PID: 8309 Comm: syz-executor4 Not tainted 4.15.0-rc4-next-20171221+ #78 [ 150.767657] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 150.776984] RIP: 0010:native_write_cr4+0x4/0x10 [ 150.781615] RSP: 0018:ffff8801c9d0f058 EFLAGS: 00010093 [ 150.786944] RAX: ffff8801c2e6e300 RBX: 00000000001606e0 RCX: ffffffff811a47f2 [ 150.794180] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 150.801417] RBP: ffff8801c9d0f058 R08: 1ffff100393a1d67 R09: 0000000000000004 [ 150.808653] R10: ffff8801c9d0efc8 R11: 0000000000000004 R12: 0000000000000093 [ 150.815890] R13: ffff8801c2e6e300 R14: ffff8801db31a130 R15: ffff8801db31a130 [ 150.823126] FS: 00007f6f949e2700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 150.831317] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 150.837167] CR2: 0000000000920008 CR3: 0000000006422005 CR4: 00000000001626e0 [ 150.844406] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 150.851642] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 150.858877] Call Trace: [ 150.861431] hardware_disable+0x34a/0x4b0 [ 150.865548] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 150.870014] kvm_arch_hardware_disable+0x35/0xd0 [ 150.874736] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 150.879198] hardware_disable_nolock+0x30/0x40 [ 150.883749] on_each_cpu+0xca/0x1b0 [ 150.887345] hardware_disable_all_nolock+0x3e/0x50 [ 150.892242] kvm_put_kvm+0x956/0xde0 [ 150.895930] ? kvm_clear_guest+0xb0/0xb0 [ 150.899961] ? kvm_irqfd_release+0xd1/0x120 [ 150.904249] ? lock_downgrade+0x980/0x980 [ 150.908373] ? _raw_spin_unlock_irq+0x27/0x70 [ 150.912838] ? kvm_irqfd_release+0xdd/0x120 [ 150.917124] ? kvm_irqfd_release+0xdd/0x120 [ 150.921412] ? kvm_put_kvm+0xde0/0xde0 [ 150.925264] kvm_vm_release+0x42/0x50 [ 150.929032] __fput+0x327/0x7e0 [ 150.932283] ? fput+0x140/0x140 [ 150.935530] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 150.941378] ? _raw_spin_unlock_irq+0x27/0x70 [ 150.945842] ____fput+0x15/0x20 [ 150.949087] task_work_run+0x199/0x270 [ 150.952942] ? task_work_cancel+0x210/0x210 [ 150.957228] ? _raw_spin_unlock+0x22/0x30 [ 150.961340] ? switch_task_namespaces+0x87/0xc0 [ 150.965978] do_exit+0x9bb/0x1ad0 [ 150.969398] ? kvfree+0x36/0x60 [ 150.972654] ? mm_update_next_owner+0x930/0x930 [ 150.977289] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 150.982443] ? kvm_set_memory_region+0x39/0x50 [ 150.986990] ? lock_downgrade+0x980/0x980 [ 150.991111] ? kvm_write_guest_cached+0x40/0x40 [ 150.995750] ? retint_kernel+0x10/0x10 [ 150.999608] ? __mutex_unlock_slowpath+0xe9/0xac0 [ 151.004420] ? wait_for_completion+0x770/0x770 [ 151.008967] ? check_noncircular+0x20/0x20 [ 151.013171] ? lru_cache_add_file+0x20/0x20 [ 151.017465] ? find_held_lock+0x35/0x1d0 [ 151.021496] ? get_signal+0x7ae/0x16c0 [ 151.025348] ? lock_downgrade+0x980/0x980 [ 151.029466] do_group_exit+0x149/0x400 [ 151.033322] ? do_raw_spin_trylock+0x190/0x190 [ 151.037869] ? SyS_exit+0x30/0x30 [ 151.041290] ? _raw_spin_unlock_irq+0x27/0x70 [ 151.045754] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 151.050739] get_signal+0x73f/0x16c0 [ 151.054424] ? ptrace_notify+0x130/0x130 [ 151.058452] ? __pmd_alloc+0x4e0/0x4e0 [ 151.062404] ? find_held_lock+0x35/0x1d0 [ 151.066433] ? __fget+0x333/0x570 [ 151.069857] ? lock_downgrade+0x980/0x980 [ 151.073973] do_signal+0x94/0x1ee0 [ 151.077489] ? setup_sigcontext+0x7d0/0x7d0 [ 151.081776] ? __fget+0x35c/0x570 [ 151.085199] ? iterate_fd+0x3f0/0x3f0 [ 151.088972] ? up_read+0x1a/0x40 [ 151.092311] ? __do_page_fault+0x3d6/0xc90 [ 151.096518] ? exit_to_usermode_loop+0x8c/0x2f0 [ 151.101159] exit_to_usermode_loop+0x258/0x2f0 [ 151.105708] ? ioctl_preallocate+0x2b0/0x2b0 [ 151.110084] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 151.115585] ? selinux_capable+0x40/0x40 [ 151.119617] syscall_return_slowpath+0x490/0x550 [ 151.124337] ? prepare_exit_to_usermode+0x340/0x340 [ 151.129319] ? entry_SYSCALL_64_fastpath+0x69/0x96 [ 151.134215] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 151.139196] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 151.143925] entry_SYSCALL_64_fastpath+0x94/0x96 [ 151.148647] RIP: 0033:0x452957 [ 151.151806] RSP: 002b:00007f6f949e0078 EFLAGS: 00000206 ORIG_RAX: 0000000000000010 [ 151.159481] RAX: 0000000000000000 RBX: 0000000000000011 RCX: 0000000000452957 [ 151.166719] RDX: 00007f6f949e04f0 RSI: 000000004020ae46 RDI: 0000000000000006 [ 151.173955] RBP: 000000002055b000 R08: 0000000000000001 R09: 0000000000000000 [ 151.181197] R10: 0000000000000006 R11: 0000000000000206 R12: 00000000fec00000 [ 151.188438] R13: 0000000000000006 R14: 00007f6f949e26d4 R15: 0000000000000005 [ 151.195686] 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 [ 151.214780] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801c9d0f058 [ 151.220893] ---[ end trace dda480731416a4da ]--- [ 151.225612] Kernel panic - not syncing: Fatal exception [ 151.231362] Dumping ftrace buffer: [ 151.234865] (ftrace buffer empty) [ 151.238539] Kernel Offset: disabled [ 151.242128] Rebooting in 86400 seconds..