[IPV4]: Initialize newly allocated hash tables in fib_semantics.c

When fib_create_info() allocates new hash tables, it neglects to
initialize them.  This leads to an oops during boot on at least
machine I use.  This patch addresses the problem.
Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/fib_semantics.c

@@ -604,8 +604,12 @@ fib_create_info(const struct rtmsg *r, struct kern_rta *rta,
 		if (!new_info_hash || !new_laddrhash) {
 			fib_hash_free(new_info_hash, bytes);
 			fib_hash_free(new_laddrhash, bytes);
-		} else
+		} else {
+			memset(new_info_hash, 0, bytes);
+			memset(new_laddrhash, 0, bytes);
+
 			fib_hash_move(new_info_hash, new_laddrhash, new_size);
+		}
 
 		if (!fib_hash_size)
 			goto failure;