[....] Starting enhanced syslogd: rsyslogd[ 10.080324] audit: type=1400 audit(1513737036.495:5): avc: denied { syslog } for pid=2984 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: [ 13.501515] audit: type=1400 audit(1513737039.916:6): avc: denied { map } for pid=3123 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-kasan-gce-5,10.128.0.8' (ECDSA) to the list of known hosts. [ 26.335927] audit: type=1400 audit(1513737052.750:7): avc: denied { map } for pid=3139 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 2017/12/20 02:30:52 parsed 1 programs 2017/12/20 02:30:52 executed programs: 0 [ 26.440892] audit: type=1400 audit(1513737052.855:8): avc: denied { map } for pid=3139 comm="syz-execprog" path="/root/syzkaller-shm078919915" 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 [ 26.516452] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu result: failed=false hanged=false err=executor 5: failed: invalid command number 7887609648979993647 (errno 110) child failed (errno 1) loop failed (errno 0) invalid command number 7887609648979993647 (errno 110) child failed (errno 1) loop failed (errno 0) [ 29.776443] kasan: CONFIG_KASAN_INLINE enabled [ 29.781090] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 29.788433] general protection fault: 0000 [#1] SMP KASAN [ 29.793945] Dumping ftrace buffer: [ 29.797456] (ftrace buffer empty) [ 29.801140] Modules linked in: [ 29.804311] CPU: 1 PID: 4032 Comm: syz-executor1 Not tainted 4.15.0-rc4+ #229 [ 29.811556] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.820894] RIP: 0010:native_write_cr4+0x4/0x10 [ 29.825536] RSP: 0018:ffff8801d9acf058 EFLAGS: 00010093 [ 29.830873] RAX: ffff8801bf6d2400 RBX: 00000000001606e0 RCX: ffffffff811a2a92 [ 29.838119] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 29.845363] RBP: ffff8801d9acf058 R08: 1ffff1003b359d67 R09: 0000000000000004 [ 29.852611] R10: ffff8801d9acefc8 R11: 0000000000000004 R12: 0000000000000093 [ 29.859859] R13: ffff8801bf6d2400 R14: ffff8801db515850 R15: ffff8801db515850 [ 29.867108] FS: 00007f9c7f89c700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 29.875309] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.881167] CR2: 00007f1182a8a000 CR3: 0000000005e22006 CR4: 00000000001626e0 [ 29.888411] Call Trace: [ 29.890978] hardware_disable+0x34a/0x4b0 [ 29.895109] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 29.899585] kvm_arch_hardware_disable+0x35/0xd0 [ 29.904318] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 29.908786] hardware_disable_nolock+0x30/0x40 [ 29.913343] on_each_cpu+0xca/0x1b0 [ 29.916949] hardware_disable_all_nolock+0x3e/0x50 [ 29.921854] kvm_put_kvm+0x956/0xdf0 [ 29.925552] ? kvm_clear_guest+0xb0/0xb0 [ 29.929597] ? kvm_irqfd_release+0xd1/0x120 [ 29.933896] ? lock_downgrade+0x980/0x980 [ 29.938034] ? _raw_spin_unlock_irq+0x27/0x70 [ 29.942511] ? kvm_irqfd_release+0xdd/0x120 [ 29.946809] ? kvm_irqfd_release+0xdd/0x120 [ 29.951110] ? kvm_put_kvm+0xdf0/0xdf0 [ 29.954973] kvm_vm_release+0x42/0x50 [ 29.958750] __fput+0x327/0x7e0 [ 29.962008] ? fput+0x140/0x140 [ 29.965267] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 29.971127] ? _raw_spin_unlock_irq+0x27/0x70 [ 29.975602] ____fput+0x15/0x20 [ 29.978860] task_work_run+0x199/0x270 [ 29.982726] ? task_work_cancel+0x210/0x210 [ 29.987023] ? _raw_spin_unlock+0x22/0x30 [ 29.991148] ? switch_task_namespaces+0x87/0xc0 [ 29.995795] do_exit+0x9bb/0x1ad0 [ 29.999223] ? check_noncircular+0x20/0x20 [ 30.003438] ? mm_update_next_owner+0x930/0x930 [ 30.008085] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 30.013252] ? __might_sleep+0x95/0x190 [ 30.017207] ? find_held_lock+0x35/0x1d0 [ 30.021253] ? futex_wait+0x402/0x990 [ 30.025031] ? lock_downgrade+0x980/0x980 [ 30.029162] ? __unqueue_futex+0x1c0/0x290 [ 30.033372] ? lock_release+0xa40/0xa40 [ 30.037328] ? fault_in_user_writeable+0x90/0x90 [ 30.042082] ? do_raw_spin_trylock+0x190/0x190 [ 30.046653] ? check_noncircular+0x20/0x20 [ 30.050884] ? drop_futex_key_refs.isra.13+0x63/0xb0 [ 30.055976] ? futex_wait+0x69e/0x990 [ 30.059773] ? find_held_lock+0x35/0x1d0 [ 30.063825] ? get_signal+0x7ae/0x16c0 [ 30.067701] ? lock_downgrade+0x980/0x980 [ 30.071843] do_group_exit+0x149/0x400 [ 30.075715] ? do_raw_spin_trylock+0x190/0x190 [ 30.080283] ? SyS_exit+0x30/0x30 [ 30.083719] ? _raw_spin_unlock_irq+0x27/0x70 [ 30.088202] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 30.093205] get_signal+0x73f/0x16c0 [ 30.096914] ? ptrace_notify+0x130/0x130 [ 30.100970] ? exit_robust_list+0x240/0x240 [ 30.105284] ? mmap_region+0x52e/0x15a0 [ 30.109251] ? find_held_lock+0x35/0x1d0 [ 30.113305] do_signal+0x94/0x1ee0 [ 30.116831] ? lock_downgrade+0x980/0x980 [ 30.120971] ? userfaultfd_unmap_complete+0x327/0x510 [ 30.126150] ? setup_sigcontext+0x7d0/0x7d0 [ 30.130462] ? userfaultfd_unmap_prep+0x540/0x540 [ 30.135294] ? do_mmap+0x362/0xe00 [ 30.138822] ? up_write+0x6b/0x120 [ 30.142352] ? down_read_killable+0x180/0x180 [ 30.146835] ? security_mmap_file+0x143/0x180 [ 30.151321] ? vm_mmap_pgoff+0x1fc/0x280 [ 30.155372] ? exit_to_usermode_loop+0x8c/0x310 [ 30.160030] exit_to_usermode_loop+0x214/0x310 [ 30.164609] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 30.170139] syscall_return_slowpath+0x490/0x550 [ 30.174878] ? prepare_exit_to_usermode+0x340/0x340 [ 30.179880] ? entry_SYSCALL_64_fastpath+0x69/0x96 [ 30.184798] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 30.189798] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.194543] entry_SYSCALL_64_fastpath+0x94/0x96 [ 30.199280] RIP: 0033:0x452a09 [ 30.202451] RSP: 002b:00007f9c7f89bce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 30.210142] RAX: fffffffffffffe00 RBX: 000000000071c038 RCX: 0000000000452a09 [ 30.217394] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000071c038 [ 30.224646] RBP: 000000000071c038 R08: 0000000000000000 R09: 000000000071c010 [ 30.231896] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 30.239148] R13: 00007ffcd900fe6f R14: 00007f9c7f89c9c0 R15: 0000000000000006 [ 30.246407] 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 [ 30.265540] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801d9acf058 [ 30.271673] ---[ end trace 96b99e65f8f8632f ]--- [ 30.276412] Kernel panic - not syncing: Fatal exception [ 30.282234] Dumping ftrace buffer: [ 30.285750] (ftrace buffer empty) [ 30.289427] Kernel Offset: disabled [ 30.293021] Rebooting in 86400 seconds..