[....] Starting enhanced syslogd: rsyslogd[ 13.088416] audit: type=1400 audit(1516750067.172:4): avc: denied { syslog } for pid=3173 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 Warning: Permanently added '10.128.0.11' (ECDSA) to the list of known hosts. syzkaller login: [ 26.159228] audit: type=1400 audit(1516750080.242:5): avc: denied { sys_admin } for pid=3330 comm="syzkaller400578" capability=21 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 [ 26.188486] IPVS: Creating netns size=2536 id=1 net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 RTNETLINK answers: Operation not supported [ 26.197653] audit: type=1400 audit(1516750080.282:6): avc: denied { net_admin } for pid=3331 comm="syzkaller400578" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "bridge0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" Cannot find device "vcan0" RTNETLINK answers: Operation not supported Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gre0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "gretap0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6_vti0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6tnl0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gre0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "ip6gretap0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" Cannot find device "erspan0" executing program executing program [ 26.544842] audit: type=1400 audit(1516750080.632:7): avc: denied { sys_chroot } for pid=3331 comm="syzkaller400578" capability=18 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 [ 26.575110] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program [ 26.592107] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 [ 26.609512] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 26.626108] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 26.642558] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program executing program executing program executing program [ 26.687696] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 [ 26.719642] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program [ 26.748786] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 26.764540] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 26.781952] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 26.798615] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 [ 26.820424] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 26.839241] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 executing program executing program executing program executing program executing program executing program executing program [ 26.897141] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 26.913586] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 [ 26.931024] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program [ 26.947318] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 26.964802] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 26.981144] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program executing program [ 26.997678] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 [ 27.018835] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 27.036151] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 executing program executing program executing program executing program executing program [ 27.052578] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 27.086478] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 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 [ 27.132724] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 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 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 [ 27.416416] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 executing program executing program executing program executing program [ 27.457718] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 27.474568] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 27.492102] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program [ 27.526055] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 27.542495] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 [ 27.560058] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program [ 27.576343] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 [ 27.592678] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program executing program executing program executing program executing program executing program [ 27.640249] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 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 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 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 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 [ 28.457018] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 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 [ 28.627889] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 28.690551] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 28.711056] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 28.727558] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 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 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 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 [ 29.140944] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program [ 29.198153] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.215555] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.231549] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 executing program executing program executing program executing program [ 29.247939] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.264847] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.287113] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program executing program [ 29.304610] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 [ 29.338292] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program [ 29.359244] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.376429] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program executing program [ 29.409479] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.430216] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.446301] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 executing program executing program executing program [ 29.462147] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 [ 29.478489] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.495557] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program [ 29.511902] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.528276] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.544949] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program executing program [ 29.561269] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.577708] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 [ 29.594405] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 executing program executing program executing program executing program [ 29.629119] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.646734] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.667823] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 executing program executing program executing program executing program [ 29.684240] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.700606] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.717941] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program executing program [ 29.752023] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.768509] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 [ 29.784993] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program [ 29.818149] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 [ 29.836102] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.852610] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 executing program executing program executing program executing program [ 29.868914] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.885247] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.906183] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program [ 29.924214] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.942302] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.960062] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program [ 29.976547] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 29.993173] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 30.010525] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program [ 30.026978] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 30.043517] l2tp_core: tunl 2: sockfd_lookup(fd=6) returned -9 [ 30.060923] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program executing program executing program [ 30.076663] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 30.098890] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 30.116818] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 executing program executing program [ 30.133606] l2tp_core: tunl 2: sockfd_lookup(fd=7) returned -9 [ 30.154779] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080 [ 30.163009] IP: [] l2tp_session_create+0xc42/0x1770 [ 30.169683] PGD 80000001c3573067 [ 30.172950] PUD 1c3514067 PMD 0 [ 30.177469] [ 30.179694] Oops: 0002 [#1] PREEMPT SMP KASAN [ 30.185637] Dumping ftrace buffer: [ 30.189491] (ftrace buffer empty) [ 30.193171] Modules linked in: [ 30.196454] CPU: 0 PID: 5197 Comm: syzkaller400578 Not tainted 4.9.78-ge9dabe6 #19 [ 30.204127] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.213457] task: ffff8801c3583000 task.stack: ffff8801c30d8000 [ 30.219568] RIP: 0010:[] [] l2tp_session_create+0xc42/0x1770 [ 30.228670] RSP: 0018:ffff8801c30dfb18 EFLAGS: 00010246 [ 30.234089] RAX: 0000000000000000 RBX: ffff8801c365d900 RCX: 0000000000000006 [ 30.241331] RDX: 1ffff100386cbb00 RSI: ffff8801c35838b0 RDI: ffff8801c365d800 [ 30.248572] RBP: ffff8801c30dfbb8 R08: 0000000000000001 R09: 0000000000000000 [ 30.255814] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801c365d6d8 [ 30.263055] R13: 0000000000007fff R14: 0000000000000000 R15: ffff8801c365d680 [ 30.270299] FS: 00007f09ce561700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 30.278496] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.284350] CR2: 0000000000000080 CR3: 00000001c3ade000 CR4: 0000000000160670 [ 30.291598] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.298843] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.306096] Stack: [ 30.308215] 0000000000000201 ffffffff83587c6e ffff8801c30dfb38 ffffffff8123b7fd [ 30.316191] ffff8801c365d680 ffff8801c365d6d8 ffff8801c365da58 ffff8801c365da50 [ 30.324184] ffff8801c365d9b0 ffff8801c365d6a0 0000000000000000 ffff8801c365d760 [ 30.332155] Call Trace: [ 30.334725] [] ? l2tp_session_get+0x1ce/0x770 [ 30.340843] [] ? trace_hardirqs_on+0xd/0x10 [ 30.346785] [] pppol2tp_connect+0x10fe/0x18f0 [ 30.352900] [] ? pppol2tp_seq_show+0xc20/0xc20 [ 30.359462] [] ? check_preemption_disabled+0x3b/0x200 [ 30.366278] [] ? check_stack_object+0x68/0x140 [ 30.372482] [] ? security_socket_connect+0x89/0xb0 [ 30.379030] [] SYSC_connect+0x1b6/0x310 [ 30.384624] [] ? SYSC_bind+0x280/0x280 [ 30.390130] [] ? __do_page_fault+0x5ec/0xd40 [ 30.396161] [] ? entry_SYSCALL_64_fastpath+0x5/0xe8 [ 30.402801] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 30.409614] [] SyS_connect+0x24/0x30 [ 30.414948] [] entry_SYSCALL_64_fastpath+0x29/0xe8 [ 30.422187] Code: 00 00 49 8d bf 80 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 d8 08 00 00 49 8b 87 80 01 00 00 ff 80 80 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 55 c8 [ 30.448885] RIP [] l2tp_session_create+0xc42/0x1770 [ 30.455643] RSP [ 30.459239] CR2: 0000000000000080 [ 30.463770] ---[ end trace 3fff4653b98a0d9b ]--- [ 30.468691] Kernel panic - not syncing: Fatal exception [ 30.474633] Dumping ftrace buffer: [ 30.478144] (ftrace buffer empty) [ 30.481822] Kernel Offset: disabled [ 30.485417] Rebooting in 86400 seconds..