ipv4: fix endianness issue in inet_rtm_getroute_build_skb()

[ Upstream commit 92548b0ee220e000d81c27ac9a80e0ede895a881 ]

The UDP length field should be in network order.
This removes the following sparse error:

net/ipv4/route.c:3173:27: warning: incorrect type in assignment (different base types)
net/ipv4/route.c:3173:27:    expected restricted __be16 [usertype] len
net/ipv4/route.c:3173:27:    got unsigned long

Fixes: 404eb77ea766 ("ipv4: support sport, dport and ip_proto in RTM_GETROUTE")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Roopa Prabhu <roopa@nvidia.com>
Cc: David Ahern <dsahern@kernel.org>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 70eba1c33fa4cd758671be92f683f1bff14dc0c4..f495fad73be907172f661e2cb39f9cc396cd3496 100644 (file)
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -3061,7 +3061,7 @@ static struct sk_buff *inet_rtm_getroute_build_skb(__be32 src, __be32 dst,
                udph = skb_put_zero(skb, sizeof(struct udphdr));
                udph->source = sport;
                udph->dest = dport;
-               udph->len = sizeof(struct udphdr);
+               udph->len = htons(sizeof(struct udphdr));
                udph->check = 0;
                break;
        }