From 66394126bf2045d25b70c9327a6372186bba7d66 Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Fri, 28 Oct 2022 10:05:57 +0200
Subject: [PATCH] netfilter: nft_payload: use __be16 to store gre version
GRE_VERSION and GRE_VERSION0 are expressed in network byte order,
use __be16. Uncovered by sparse:
net/netfilter/nft_payload.c:112:25: warning: incorrect type in assignment (different base types)
net/netfilter/nft_payload.c:112:25: expected unsigned int [usertype] version
net/netfilter/nft_payload.c:112:25: got restricted __be16
net/netfilter/nft_payload.c:114:22: warning: restricted __be16 degrades to integer
Fixes: c247897d7c19 ("netfilter: nft_payload: access GRE payload via inner offset")
Reported-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
net/netfilter/nft_payload.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/netfilter/nft_payload.c b/net/netfilter/nft_payload.c
index 9d2ac764a14c..53e64d8aa01f 100644
--- a/net/netfilter/nft_payload.c
+++ b/net/netfilter/nft_payload.c
@@ -102,8 +102,9 @@ static int __nft_payload_inner_offset(struct nft_pktinfo *pkt)
}
break;
case IPPROTO_GRE: {
- u32 offset = sizeof(struct gre_base_hdr), version;
+ u32 offset = sizeof(struct gre_base_hdr);
struct gre_base_hdr *gre, _gre;
+ __be16 version;
gre = skb_header_pointer(pkt->skb, thoff, sizeof(_gre), &_gre);
if (!gre)
--
2.30.9