[AF_UNIX]: Remove spurious len test in unix_mkname.

Noticed by James Antill <james-linux-kernel@and.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/unix/af_unix.c

@@ -187,18 +187,7 @@ static int unix_mkname(struct sockaddr_un * sunaddr, int len, unsigned *hashp)
 		return -EINVAL;
 	if (!sunaddr || sunaddr->sun_family != AF_UNIX)
 		return -EINVAL;
-	if (sunaddr->sun_path[0])
-	{
-		/*
-		 *	This may look like an off by one error but it is
-		 *	a bit more subtle. 108 is the longest valid AF_UNIX
-		 *	path for a binding. sun_path[108] doesn't as such
-		 *	exist. However in kernel space we are guaranteed that
-		 *	it is a valid memory location in our kernel
-		 *	address buffer.
-		 */
-		if (len > sizeof(*sunaddr))
-			len = sizeof(*sunaddr);
+	if (sunaddr->sun_path[0]) {
 		((char *)sunaddr)[len]=0;
 		len = strlen(sunaddr->sun_path)+1+sizeof(short);
 		return len;