[....] Starting enhanced syslogd: rsyslogd[ 12.074045] audit: type=1400 audit(1515887415.759:5): avc: denied { syslog } for pid=3493 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: [ 20.186501] audit: type=1400 audit(1515887423.872:6): avc: denied { map } for pid=3633 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 '10.128.15.212' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 26.395721] audit: type=1400 audit(1515887430.081:7): avc: denied { map } for pid=3647 comm="syzkaller658128" path="/root/syzkaller658128756" 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 RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 26.668485] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument executing program [ 27.018929] kvm: KVM_SET_TSS_ADDR need to be called before entering vcpu [ 27.047071] kasan: CONFIG_KASAN_INLINE enabled [ 27.051693] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 27.059033] general protection fault: 0000 [#1] SMP KASAN [ 27.064549] Dumping ftrace buffer: [ 27.068084] (ftrace buffer empty) [ 27.071772] Modules linked in: [ 27.074952] CPU: 1 PID: 3804 Comm: syzkaller658128 Not tainted 4.15.0-rc7+ #260 [ 27.082373] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.091715] RIP: 0010:native_write_cr4+0x4/0x10 [ 27.096360] RSP: 0018:ffff8801d4e4f068 EFLAGS: 00010093 [ 27.101706] RAX: ffff8801bbb16080 RBX: 00000000001606e0 RCX: ffffffff811a32b2 [ 27.108962] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000001606e0 [ 27.116201] RBP: ffff8801d4e4f068 R08: 1ffff1003a9c9d69 R09: 0000000000000004 [ 27.123450] R10: ffff8801d4e4efd8 R11: 0000000000000004 R12: 0000000000000093 [ 27.130714] R13: ffff8801bbb16080 R14: ffff8801db31d130 R15: ffff8801db31d130 [ 27.137958] FS: 00007f6682d3f700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 27.146161] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.152021] CR2: 0000000000000000 CR3: 0000000006822005 CR4: 00000000001626e0 [ 27.159271] Call Trace: [ 27.161836] hardware_disable+0x34a/0x4b0 [ 27.165955] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 27.170418] kvm_arch_hardware_disable+0x35/0xd0 [ 27.175154] ? kvm_io_bus_get_dev+0x2a0/0x2a0 [ 27.179647] hardware_disable_nolock+0x30/0x40 [ 27.184202] on_each_cpu+0xca/0x1b0 [ 27.187800] hardware_disable_all_nolock+0x3e/0x50 [ 27.192698] kvm_put_kvm+0x956/0xdf0 [ 27.196383] ? kvm_clear_guest+0xb0/0xb0 [ 27.200411] ? kvm_irqfd_release+0xd1/0x120 [ 27.204700] ? lock_downgrade+0x980/0x980 [ 27.208824] ? _raw_spin_unlock_irq+0x27/0x70 [ 27.213299] ? kvm_irqfd_release+0xdd/0x120 [ 27.217589] ? kvm_irqfd_release+0xdd/0x120 [ 27.221879] ? kvm_put_kvm+0xdf0/0xdf0 [ 27.225735] kvm_vm_release+0x42/0x50 [ 27.229507] __fput+0x327/0x7e0 [ 27.232756] ? fput+0x140/0x140 [ 27.236004] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 27.241864] ? _raw_spin_unlock_irq+0x27/0x70 [ 27.246333] ____fput+0x15/0x20 [ 27.249582] task_work_run+0x199/0x270 [ 27.253437] ? task_work_cancel+0x210/0x210 [ 27.257728] ? _raw_spin_unlock+0x22/0x30 [ 27.261842] ? switch_task_namespaces+0x87/0xc0 [ 27.266485] do_exit+0x9bb/0x1ad0 [ 27.269924] ? mm_update_next_owner+0x930/0x930 [ 27.275284] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 27.280449] ? __might_sleep+0x95/0x190 [ 27.284402] ? find_held_lock+0x35/0x1d0 [ 27.288439] ? futex_wait+0x402/0x9a0 [ 27.292206] ? lock_downgrade+0x980/0x980 [ 27.296323] ? __unqueue_futex+0x1c0/0x290 [ 27.300526] ? lock_release+0xa40/0xa40 [ 27.304470] ? fault_in_user_writeable+0x90/0x90 [ 27.309195] ? do_raw_spin_trylock+0x190/0x190 [ 27.313752] ? futex_wake+0x680/0x680 [ 27.317528] ? check_noncircular+0x20/0x20 [ 27.321738] ? drop_futex_key_refs.isra.12+0x63/0xb0 [ 27.326823] ? futex_wait+0x6a9/0x9a0 [ 27.330611] ? find_held_lock+0x35/0x1d0 [ 27.334648] ? get_signal+0x7ae/0x16c0 [ 27.338505] ? lock_downgrade+0x980/0x980 [ 27.342627] do_group_exit+0x149/0x400 [ 27.346486] ? do_raw_spin_trylock+0x190/0x190 [ 27.351038] ? SyS_exit+0x30/0x30 [ 27.354461] ? _raw_spin_unlock_irq+0x27/0x70 [ 27.358926] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.363931] get_signal+0x73f/0x16c0 [ 27.367622] ? ptrace_notify+0x130/0x130 [ 27.371659] ? exit_robust_list+0x240/0x240 [ 27.375949] ? find_held_lock+0x35/0x1d0 [ 27.379984] ? __fget+0x333/0x570 [ 27.383418] ? lock_downgrade+0x980/0x980 [ 27.387535] do_signal+0x90/0x1eb0 [ 27.391044] ? __lock_is_held+0xb6/0x140 [ 27.395075] ? setup_sigcontext+0x7d0/0x7d0 [ 27.399367] ? __fget+0x35c/0x570 [ 27.402803] ? iterate_fd+0x3f0/0x3f0 [ 27.406579] ? finish_task_switch+0x1d3/0x740 [ 27.411044] ? exit_to_usermode_loop+0x8c/0x310 [ 27.415683] exit_to_usermode_loop+0x214/0x310 [ 27.420240] ? ioctl_preallocate+0x2b0/0x2b0 [ 27.424625] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 27.430130] ? selinux_capable+0x40/0x40 [ 27.434165] syscall_return_slowpath+0x490/0x550 [ 27.438894] ? prepare_exit_to_usermode+0x340/0x340 [ 27.443887] ? entry_SYSCALL_64_fastpath+0x6d/0x9a [ 27.448789] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 27.453780] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 27.458509] entry_SYSCALL_64_fastpath+0x98/0x9a [ 27.463249] RIP: 0033:0x44a299 [ 27.466413] RSP: 002b:00007f6682d3eda8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 27.474089] RAX: fffffffffffffe00 RBX: 00000000006dbc54 RCX: 000000000044a299 [ 27.481354] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000006dbc54 [ 27.488594] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 27.495856] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc50 [ 27.503122] R13: 6d766b2f7665642f R14: 00007f6682d3f9c0 R15: 0000000000000009 [ 27.510379] 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 [ 27.529547] RIP: native_write_cr4+0x4/0x10 RSP: ffff8801d4e4f068 [ 27.535662] ---[ end trace 487e34cf31268825 ]--- [ 27.540386] Kernel panic - not syncing: Fatal exception [ 27.545758] Dumping ftrace buffer: [ 27.549270] (ftrace buffer empty) [ 27.552945] Kernel Offset: disabled [ 27.556539] Rebooting in 86400 seconds..