[....] Starting enhanced syslogd: rsyslogd[ 17.081049] audit: type=1400 audit(1517425691.840:5): avc: denied { syslog } for pid=4010 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: [ 21.928039] audit: type=1400 audit(1517425696.687:6): avc: denied { map } for pid=4149 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 '10.128.15.203' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 28.286696] audit: type=1400 audit(1517425703.046:7): avc: denied { map } for pid=4163 comm="syzkaller892522" path="/root/syzkaller892522550" 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 [ 28.682370] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 29.274136] kasan: CONFIG_KASAN_INLINE enabled [ 29.278795] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 29.286435] general protection fault: 0000 [#1] SMP KASAN [ 29.291964] Dumping ftrace buffer: [ 29.295475] (ftrace buffer empty) [ 29.299159] Modules linked in: [ 29.302334] CPU: 0 PID: 4367 Comm: syzkaller892522 Not tainted 4.15.0+ #288 [ 29.309401] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.318734] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 29.323806] RSP: 0018:ffff8801ab547af0 EFLAGS: 00010202 [ 29.329145] RAX: dffffc0000000000 RBX: ffff8801ac910200 RCX: ffffffff85128a00 [ 29.336407] RDX: 0000000000000045 RSI: 000000005f1f98cf RDI: 0000000000000228 [ 29.343649] RBP: ffff8801ab547d70 R08: 1ffff100356a8e9f R09: 0000000000000002 [ 29.350888] R10: ffff8801ab5479c0 R11: 0000000000000000 R12: ffff8801acf2d200 [ 29.358132] R13: ffff8801ab547d48 R14: 0000000000000000 R15: ffff8801ab547c28 [ 29.365373] FS: 0000000001d3a880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 29.374098] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.379948] CR2: 00000000205c5fe4 CR3: 00000001d3a02001 CR4: 00000000001606f0 [ 29.387191] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.394435] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.401675] Call Trace: [ 29.404259] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 29.409443] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 29.414786] ? selinux_socket_connect+0x311/0x730 [ 29.419601] ? lock_downgrade+0x980/0x980 [ 29.423733] ? selinux_socket_setsockopt+0x80/0x80 [ 29.428634] ? lock_release+0xa40/0xa40 [ 29.432581] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 29.438458] ? __check_object_size+0x25d/0x4f0 [ 29.443026] ? __might_sleep+0x95/0x190 [ 29.446979] ? security_socket_connect+0x89/0xb0 [ 29.451721] SYSC_connect+0x213/0x4a0 [ 29.455494] ? SYSC_bind+0x410/0x410 [ 29.459180] ? get_unused_fd_flags+0x121/0x190 [ 29.463739] ? sock_map_fd+0x53/0x90 [ 29.467431] ? SyS_socket+0x12d/0x1d0 [ 29.471203] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 29.476023] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.481026] SyS_connect+0x24/0x30 [ 29.484548] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 29.489280] RIP: 0033:0x4457e9 [ 29.492442] RSP: 002b:00007ffdf46353a8 EFLAGS: 00000203 ORIG_RAX: 000000000000002a [ 29.500122] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 00000000004457e9 [ 29.507363] RDX: 000000000000002e RSI: 00000000205fafd2 RDI: 0000000000000005 [ 29.514608] RBP: 0000000000007254 R08: 0000000000000000 R09: 0000000000000000 [ 29.521855] R10: 0000000000000000 R11: 0000000000000203 R12: 0000000000000000 [ 29.529099] R13: 0000000000000004 R14: 00000000006d4050 R15: 00000000004a75ac [ 29.536347] Code: fe ff ff e8 c0 05 5e fc 4c 89 fa 49 8d be 28 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 c6 04 02 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 e5 09 00 00 4c 89 fa 48 b8 00 00 00 00 00 fc [ 29.555428] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801ab547af0 [ 29.562094] ---[ end trace 3855804922da40e9 ]--- [ 29.566868] Kernel panic - not syncing: Fatal exception [ 29.572628] Dumping ftrace buffer: [ 29.576139] (ftrace buffer empty) [ 29.579831] Kernel Offset: disabled [ 29.583433] Rebooting in 86400 seconds..