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netfilter: nft_payload: use __be16 to store gre version

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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: c247897d7c ("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>
This commit is contained in:
Pablo Neira Ayuso 2022-10-28 10:05:57 +02:00
parent 6f1a298b2e
commit 66394126bf
1 changed files with 2 additions and 1 deletions
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3
net/netfilter/nft_payload.c
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@ -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)