IPVS: Creating netns size=2536 id=8
ip (4101) used greatest stack depth: 24048 bytes left
audit: type=1400 audit(1519462179.396:7): avc:  denied  { sys_chroot } for  pid=3806 comm="syz-executor5" 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
audit: type=1400 audit(1519462179.446:8): avc:  denied  { net_raw } for  pid=4992 comm="syz-executor6" capability=13  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
------------[ cut here ]------------
kernel BUG at ./include/linux/skbuff.h:1935!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 5000 Comm: syz-executor6 Not tainted 4.9.83-g72766d7 #50
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801cb256000 task.stack: ffff8801b3508000
RIP: 0010:[<ffffffff8342a7bc>]  [<ffffffff8342a7bc>] __skb_pull include/linux/skbuff.h:1935 [inline]
RIP: 0010:[<ffffffff8342a7bc>]  [<ffffffff8342a7bc>] __ip6_make_skb+0x121c/0x1c20 net/ipv6/ip6_output.c:1700
RSP: 0018:ffff8801b350f410  EFLAGS: 00010293
RAX: ffff8801cb256000 RBX: 0000000000000738 RCX: ffffffff8342a7bc
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8801c75084e0
RBP: ffff8801b350f630 R08: ffff8801cc2a47f8 R09: 0000000000000000
R10: 0000000000001100 R11: ffffed00390bb131 R12: 00000000000000d6
R13: ffff8801cc2a4780 R14: ffff8801cc2a47fc R15: ffff8801c7508000
FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7746b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00007ffeecd14b18 CR3: 00000001bdc0c000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801cc2a4988 ffff8801cc2a483c ffff8801cc2a4850 ffff8801cc2a4848
 ffff8801c85df4c8 1ffff100366a1e94 ffff8801bb470c40 ffff8801b4b14ea0
 ffff8801c7508012 ffff8801c7508540 ffff8801bc909a40 ffff8801cc2a4808
Call Trace:
 [<ffffffff8348ce6a>] ip6_finish_skb include/net/ipv6.h:911 [inline]
 [<ffffffff8348ce6a>] udp_v6_push_pending_frames+0x20a/0x340 net/ipv6/udp.c:1003
 [<ffffffff83491cb8>] udpv6_sendmsg+0x1f38/0x2540 net/ipv6/udp.c:1273
 [<ffffffff832f269c>] inet_sendmsg+0x2bc/0x4c0 net/ipv4/af_inet.c:770
 [<ffffffff82ed8baa>] sock_sendmsg_nosec net/socket.c:635 [inline]
 [<ffffffff82ed8baa>] sock_sendmsg+0xca/0x110 net/socket.c:645
 [<ffffffff82eda410>] ___sys_sendmsg+0x320/0x7e0 net/socket.c:1969
 [<ffffffff82edcb34>] __sys_sendmmsg+0x234/0x3a0 net/socket.c:2052
 [<ffffffff82fdf182>] C_SYSC_sendmmsg net/compat.c:740 [inline]
 [<ffffffff82fdf182>] compat_SyS_sendmmsg+0x32/0x40 net/compat.c:737
 [<ffffffff81006f95>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006f95>] do_fast_syscall_32+0x2f5/0x870 arch/x86/entry/common.c:387
 [<ffffffff838b6590>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137
Code: 08 84 c9 0f 85 9f 08 00 00 41 3b 45 7c 72 17 e8 7b 0c f4 fd 45 89 e6 4d 01 f7 4d 89 bd d0 00 00 00 e9 0d f2 ff ff e8 64 0c f4 fd <0f> 0b e8 5d 0c f4 fd 48 8b 7c 24 50 e8 c3 cd fe ff 41 89 c4 e9 
RIP  [<ffffffff8342a7bc>] __skb_pull include/linux/skbuff.h:1935 [inline]
RIP  [<ffffffff8342a7bc>] __ip6_make_skb+0x121c/0x1c20 net/ipv6/ip6_output.c:1700
 RSP <ffff8801b350f410>
---[ end trace 9f7393f634462f4c ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled