IPv6: NLM_F_REPLACE set, but no existing node found!
WARNING: CPU: 0 PID: 16953 at ./include/net/sock.h:1513 sock_owned_by_me include/net/sock.h:1513 [inline]
WARNING: CPU: 0 PID: 16953 at ./include/net/sock.h:1513 sock_owned_by_user include/net/sock.h:1519 [inline]
WARNING: CPU: 0 PID: 16953 at ./include/net/sock.h:1513 strp_data_ready+0x2b7/0x390 net/strparser/strparser.c:404
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 16953 Comm: syz-executor3 Not tainted 4.14.0-next-20171122+ #49
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x211/0x2d0 lib/bug.c:184
 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:177
 fixup_bug arch/x86/kernel/traps.c:246 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:926
RIP: 0010:sock_owned_by_me include/net/sock.h:1513 [inline]
RIP: 0010:sock_owned_by_user include/net/sock.h:1519 [inline]
RIP: 0010:strp_data_ready+0x2b7/0x390 net/strparser/strparser.c:404
RSP: 0018:ffff8801d8dd7920 EFLAGS: 00010212
RAX: 0000000000010000 RBX: ffff8801cff85748 RCX: ffffffff84a885b7
RDX: 0000000000000202 RSI: ffffc90003e02000 RDI: ffffffff860eb3c0
RBP: ffff8801d8dd7940 R08: 0000000000000000 R09: 0000000000000006
R10: 0000000000000000 R11: ffffffff8747dd60 R12: ffff8801db121040
R13: ffff8801cff85750 R14: ffff8801d8dd7aa8 R15: ffff8801db121040
 psock_data_ready+0x56/0x70 net/kcm/kcmsock.c:353
 unix_dgram_sendmsg+0xa72/0x1600 net/unix/af_unix.c:1809
 sock_sendmsg_nosec net/socket.c:632 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:642
 ___sys_sendmsg+0x75b/0x8a0 net/socket.c:2048
 __sys_sendmsg+0xe5/0x210 net/socket.c:2082
 SYSC_sendmsg net/socket.c:2093 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2089
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452879
RSP: 002b:00007fdbe9e67be8 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000007580d8 RCX: 0000000000452879
RDX: 0000000000000000 RSI: 0000000020e69000 RDI: 0000000000000016
RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006ed8e0
R13: 00000000ffffffff R14: 00007fdbe9e686d4 R15: 0000000000000003
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..