[PATCH 4.19 104/293] ipv4: fix endianness issue in inet_rtm_getroute_build_skb()

[Greg Kroah-Hartman]

From: Eric Dumazet <edumazet@xxxxxxxxxx>

[ 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@xxxxxxxxxx>
Cc: Roopa Prabhu <roopa@xxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxxx>
Reviewed-by: David Ahern <dsahern@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 net/ipv4/route.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index d72bffab6ffc..730a15fc497c 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2815,7 +2815,7 @@ 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;
 	}
-- 
2.30.2