WARNING: CPU: 3 PID: 3001 at ./include/net/sock.h:1505 sock_owned_by_me include/net/sock.h:1505 [inline]
WARNING: CPU: 3 PID: 3001 at ./include/net/sock.h:1505 sock_owned_by_user include/net/sock.h:1511 [inline]
WARNING: CPU: 3 PID: 3001 at ./include/net/sock.h:1505 strp_data_ready+0x2b7/0x390 net/strparser/strparser.c:404
Kernel panic - not syncing: panic_on_warn set ...

CPU: 3 PID: 3001 Comm: syzkaller177476 Not tainted 4.13.0-next-20170905+ #15
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:52
 panic+0x1e4/0x417 kernel/panic.c:181
 __warn+0x1c4/0x1d9 kernel/panic.c:542
 report_bug+0x211/0x2d0 lib/bug.c:183
 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:178
 do_trap_no_signal arch/x86/kernel/traps.c:212 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:261
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:298
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:311
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905
RIP: 0010:sock_owned_by_me include/net/sock.h:1505 [inline]
RIP: 0010:sock_owned_by_user include/net/sock.h:1511 [inline]
RIP: 0010:strp_data_ready+0x2b7/0x390 net/strparser/strparser.c:404
RSP: 0018:ffff88003dc9f990 EFLAGS: 00010297
RAX: ffff88003d380740 RBX: ffff880067985a48 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff88006c5b60e0 RDI: ffffffff85cc1060
RBP: ffff88003dc9f9b0 R08: 0000000000000000 R09: 0000000000000001
R10: ffff88003dc9f130 R11: ffffffff8705fca0 R12: ffff88006c5b6040
R13: ffff880067985a50 R14: ffff880068947d40 R15: 0000000000000099
 psock_data_ready+0x56/0x70 net/kcm/kcmsock.c:353
 unix_stream_sendmsg+0x708/0xbe0 net/unix/af_unix.c:1910
 sock_sendmsg_nosec net/socket.c:633 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:643
 ___sys_sendmsg+0x75b/0x8a0 net/socket.c:2049
 __sys_sendmsg+0xe5/0x210 net/socket.c:2083
 SYSC_sendmsg net/socket.c:2094 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2090
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x4351d9
RSP: 002b:00007ffc27db3b88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004002b0 RCX: 00000000004351d9
RDX: 0000000000008080 RSI: 00000000203a3000 RDI: 0000000000000003
RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000401b50 R14: 0000000000401be0 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..