WARNING: CPU: 1 PID: 2989 at ./include/net/sock.h:1507 sock_owned_by_me include/net/sock.h:1507 [inline]
WARNING: CPU: 1 PID: 2989 at ./include/net/sock.h:1507 sock_owned_by_user include/net/sock.h:1513 [inline]
WARNING: CPU: 1 PID: 2989 at ./include/net/sock.h:1507 strp_data_ready+0x2b7/0x390 net/strparser/strparser.c:404
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 2989 Comm: syzkaller185908 Not tainted 4.14.0-rc5-mm1+ #20
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:52
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1c4/0x1e0 kernel/panic.c:546
 report_bug+0x211/0x2d0 lib/bug.c:183
 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:177
 do_trap_no_signal arch/x86/kernel/traps.c:211 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:260
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:297
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:310
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905
RIP: 0010:sock_owned_by_me include/net/sock.h:1507 [inline]
RIP: 0010:sock_owned_by_user include/net/sock.h:1513 [inline]
RIP: 0010:strp_data_ready+0x2b7/0x390 net/strparser/strparser.c:404
RSP: 0018:ffff8801d322f7d8 EFLAGS: 00010293
RAX: ffff8801d1e2a140 RBX: ffff8801cf5b0c48 RCX: ffffffff847b0437
RDX: 0000000000000000 RSI: ffff8801d4761120 RDI: ffffffff85cc4e60
RBP: ffff8801d322f7f8 R08: 0000000000000002 R09: 1ffffffff0cddfc6
R10: ffff8801d322f6c0 R11: 1ffff1003a3c5683 R12: ffff8801d4761080
R13: ffff8801cf5b0c50 R14: ffff8801d322f960 R15: ffff8801d4761080
 psock_data_ready+0x56/0x70 net/kcm/kcmsock.c:353
 unix_dgram_sendmsg+0xa72/0x1600 net/unix/af_unix.c:1808
 unix_seqpacket_sendmsg+0xf3/0x160 net/unix/af_unix.c:2062
 sock_sendmsg_nosec net/socket.c:632 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:642
 ___sys_sendmsg+0x31c/0x890 net/socket.c:2048
 __sys_sendmmsg+0x1e6/0x5f0 net/socket.c:2138
 SYSC_sendmmsg net/socket.c:2169 [inline]
 SyS_sendmmsg+0x35/0x60 net/socket.c:2164
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x43fe69
RSP: 002b:00007fffa34a3338 EFLAGS: 00000217 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fe69
RDX: 0000000000000001 RSI: 0000000020e83fc4 RDI: 0000000000000004
RBP: 0000000000000082 R08: 00000000004017d0 R09: 00000000004017d0
R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004017d0
R13: 0000000000401860 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..