From 1d3e3d569712e994483643f17b95ebf83965d4f2 Mon Sep 17 00:00:00 2001
From: Eric Dumazet <edumazet@google.com>
Date: Mon, 30 Aug 2021 19:02:10 -0700
Subject: [PATCH] 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>
---
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;
}