[IPV4]: Missing TOS checks after fib_find_alias

It looks like some of the places where FIB_SCAN_TOS macros were used
have lost the tos check.  This patch adds them back.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/fib_hash.c

@@ -538,6 +538,8 @@ fn_hash_insert(struct fib_table *tb, struct rtmsg *r, struct kern_rta *rta,
 		 */
 		fa_orig = fa;
 		list_for_each_entry(fa, fa_orig->fa_list.prev, fa_list) {
+			if (fa->fa_tos != tos)
+				break;
 			if (fa->fa_info->fib_priority != fi->fib_priority)
 				break;
 			if (fa->fa_type == type &&
@@ -639,6 +641,9 @@ fn_hash_delete(struct fib_table *tb, struct rtmsg *r, struct kern_rta *rta,
 	list_for_each_entry(fa, fa_head, fa_list) {
 		struct fib_info *fi = fa->fa_info;
 
+		if (fa->fa_tos != tos)
+			break;
+
 		if ((!r->rtm_type ||
 		     fa->fa_type == r->rtm_type) &&
 		    (r->rtm_scope == RT_SCOPE_NOWHERE ||