netfilter: nft_osf: restrict osf to ipv4, ipv6 and inet families
[ Upstream commit 5f3b7aae14a706d0d7da9f9e39def52ff5fc3d39 ]
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>
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@ -115,9 +115,21 @@ static int nft_osf_validate(const struct nft_ctx *ctx,
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const struct nft_expr *expr,
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const struct nft_expr *expr,
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const struct nft_data **data)
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const struct nft_data **data)
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{
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{
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return nft_chain_validate_hooks(ctx->chain, (1 << NF_INET_LOCAL_IN) |
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unsigned int hooks;
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(1 << NF_INET_PRE_ROUTING) |
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(1 << NF_INET_FORWARD));
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switch (ctx->family) {
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case NFPROTO_IPV4:
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case NFPROTO_IPV6:
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case NFPROTO_INET:
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hooks = (1 << NF_INET_LOCAL_IN) |
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(1 << NF_INET_PRE_ROUTING) |
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(1 << NF_INET_FORWARD);
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break;
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default:
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return -EOPNOTSUPP;
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}
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return nft_chain_validate_hooks(ctx->chain, hooks);
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}
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}
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static struct nft_expr_type nft_osf_type;
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static struct nft_expr_type nft_osf_type;
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