[....] Starting enhanced syslogd: rsyslogd[ 12.727607] audit: type=1400 audit(1518693316.109:4): avc: denied { syslog } for pid=3642 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 Warning: Permanently added '10.128.0.20' (ECDSA) to the list of known hosts. syzkaller login: [ 32.750703] audit: type=1400 audit(1518693336.129:5): avc: denied { sys_admin } for pid=3800 comm="syzkaller542626" 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 [ 32.779012] 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 RTNETLINK answers: Operation not supported [ 32.788206] audit: type=1400 audit(1518693336.169:6): avc: denied { net_admin } for pid=3801 comm="syzkaller542626" 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 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 [ 33.106753] audit: type=1400 audit(1518693336.489:7): avc: denied { sys_chroot } for pid=3801 comm="syzkaller542626" 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 executing program executing program executing program executing program [ 33.426285] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080 [ 33.434496] IP: [] l2tp_session_create+0xc42/0x1770 [ 33.441163] PGD 80000001ca002067 [ 33.444416] PUD 1d9808067 PMD 0 [ 33.447879] [ 33.449492] Oops: 0002 [#1] PREEMPT SMP KASAN [ 33.453956] Dumping ftrace buffer: [ 33.457463] (ftrace buffer empty) [ 33.461141] Modules linked in: [ 33.464417] CPU: 0 PID: 3955 Comm: syzkaller542626 Not tainted 4.9.81-gd2c57b6 #42 [ 33.472090] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.481415] task: ffff8801d7e54800 task.stack: ffff8801d6118000 [ 33.487439] RIP: 0010:[] [] l2tp_session_create+0xc42/0x1770 [ 33.496538] RSP: 0018:ffff8801d611fab0 EFLAGS: 00010246 [ 33.501955] RAX: 0000000000000000 RBX: ffff8801b715b180 RCX: 0000000000000006 [ 33.509193] RDX: 1ffff100370cef50 RSI: ffff8801d7e550b0 RDI: ffff8801b8677a80 [ 33.516438] RBP: ffff8801d611fb50 R08: 0000000000000001 R09: 0000000000000000 [ 33.523675] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801b8677958 [ 33.530912] R13: 0000000000000018 R14: 0000000000000000 R15: ffff8801b8677900 [ 33.538150] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f77c6b40 [ 33.546343] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 33.552190] CR2: 0000000000000080 CR3: 00000001da24e000 CR4: 0000000000160670 [ 33.559431] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.566668] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.573903] Stack: [ 33.576020] ffffffff83587d6d ffffffff83588e1e ffff8801ce9ebb48 0000000000000000 [ 33.583980] ffff8801b8677900 ffff8801b8677958 ffff8801b715b2d8 ffff8801b715b2d0 [ 33.591940] ffff8801b715b230 ffff8801b8677920 0000000000000000 ffff8801ce9eb300 [ 33.599904] Call Trace: [ 33.602457] [] ? l2tp_session_create+0xf4d/0x1770 [ 33.608915] [] ? l2tp_session_get+0x1ce/0x770 [ 33.615036] [] pppol2tp_connect+0x10fe/0x18f0 [ 33.621145] [] ? pppol2tp_seq_show+0xc20/0xc20 [ 33.627342] [] ? check_stack_object+0x68/0x140 [ 33.633543] [] ? security_socket_connect+0x89/0xb0 [ 33.640088] [] SYSC_connect+0x1b6/0x310 [ 33.645688] [] ? SYSC_bind+0x280/0x280 [ 33.651193] [] ? memset+0x31/0x40 [ 33.656264] [] ? up_read+0x1a/0x40 [ 33.661424] [] ? __do_page_fault+0x3bd/0xd40 [ 33.667448] [] SyS_connect+0x24/0x30 [ 33.672789] [] ? SyS_accept+0x30/0x30 [ 33.678210] [] do_fast_syscall_32+0x2f7/0x870 [ 33.684323] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.690955] [] entry_SYSENTER_compat+0x74/0x83 [ 33.697151] 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 [ 33.723670] RIP [] l2tp_session_create+0xc42/0x1770 [ 33.730418] RSP [ 33.734008] CR2: 0000000000000080 [ 33.737820] ---[ end trace d8acee552cf3b4c1 ]--- [ 33.742548] Kernel panic - not syncing: Fatal exception [ 33.748247] Dumping ftrace buffer: [ 33.751755] (ftrace buffer empty) [ 33.755436] Kernel Offset: disabled [ 33.759032] Rebooting in 86400 seconds..