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netfilter: nft_osf: restrict osf to ipv4, ipv6 and inet families

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[ Upstream commit 5f3b7aae14 ]

As it was originally intended, restrict extension to supported families.

Fixes: b96af92d6e ("netfilter: nf_tables: implement Passive OS fingerprint module in nft_osf")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Pablo Neira Ayuso 2022-08-21 16:25:07 +02:00 committed by Greg Kroah-Hartman
parent c907dfe4ea
commit 9a67c2c89c
1 changed files with 15 additions and 3 deletions
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18
net/netfilter/nft_osf.c
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@ -115,9 +115,21 @@ static int nft_osf_validate(const struct nft_ctx *ctx,
const struct nft_expr *expr, const struct nft_expr *expr,
const struct nft_data **data) const struct nft_data **data)
{ {
return nft_chain_validate_hooks(ctx->chain, (1 << NF_INET_LOCAL_IN) | unsigned int hooks;
(1 << NF_INET_PRE_ROUTING) |
(1 << NF_INET_FORWARD)); switch (ctx->family) {
case NFPROTO_IPV4:
case NFPROTO_IPV6:
case NFPROTO_INET:
hooks = (1 << NF_INET_LOCAL_IN) |
(1 << NF_INET_PRE_ROUTING) |
(1 << NF_INET_FORWARD);
break;
default:
return -EOPNOTSUPP;
}
return nft_chain_validate_hooks(ctx->chain, hooks);
} }
static struct nft_expr_type nft_osf_type; static struct nft_expr_type nft_osf_type;