netdev - [PATCH net-next 1/6] netfilter: nft_payload: use _

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20221114104106.8719-2-pablo@netfilter.org>
Date:   Mon, 14 Nov 2022 11:41:01 +0100
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     netfilter-devel@...r.kernel.org
Cc:     davem@...emloft.net, netdev@...r.kernel.org, kuba@...nel.org,
        pabeni@...hat.com, edumazet@...gle.com
Subject: [PATCH net-next 1/6] 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@...nel.org>
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.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)
-- 
2.30.2