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[net,3/4] netfilter: nft_redir: correct length for loading protocol registers

Message ID 20230309174655.69816-4-pablo@netfilter.org
State Accepted
Delegated to: Pablo Neira
Headers show
Series [net,1/4] netfilter: nft_nat: correct length for loading protocol registers | expand

Commit Message

Pablo Neira Ayuso March 9, 2023, 5:46 p.m. UTC 
From: Jeremy Sowden <jeremy@azazel.net>

The values in the protocol registers are two bytes wide.  However, when
parsing the register loads, the code currently uses the larger 16-byte
size of a `union nf_inet_addr`.  Change it to use the (correct) size of
a `union nf_conntrack_man_proto` instead.

Fixes: d07db9884a5f ("netfilter: nf_tables: introduce nft_validate_register_load()")
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Reviewed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nft_redir.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/net/netfilter/nft_redir.c b/net/netfilter/nft_redir.c
index 5f7739987559..dbc642f5d32a 100644
--- a/net/netfilter/nft_redir.c
+++ b/net/netfilter/nft_redir.c
@@ -48,7 +48,7 @@  static int nft_redir_init(const struct nft_ctx *ctx,
 	unsigned int plen;
 	int err;
 
-	plen = sizeof_field(struct nf_nat_range, min_addr.all);
+	plen = sizeof_field(struct nf_nat_range, min_proto.all);
 	if (tb[NFTA_REDIR_REG_PROTO_MIN]) {
 		err = nft_parse_register_load(tb[NFTA_REDIR_REG_PROTO_MIN],
 					      &priv->sreg_proto_min, plen);