Netfilter-Devel Archive on lore.kernel.org
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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Fernando Fernandez Mancera <ffmancera@riseup.net>,
	Pablo Neira Ayuso <pablo@netfilter.org>,
	Sasha Levin <sashal@kernel.org>,
	netfilter-devel@vger.kernel.org, coreteam@netfilter.org,
	netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 032/671] netfilter: nft_osf: usage from output path is not valid
Date: Thu, 16 Jan 2020 11:44:23 -0500
Message-ID: <20200116165502.8838-32-sashal@kernel.org> (raw)
In-Reply-To: <20200116165502.8838-1-sashal@kernel.org>

From: Fernando Fernandez Mancera <ffmancera@riseup.net>

[ Upstream commit 4a3e71b7b7dbaf3562be9d508260935aa13cb48b ]

The nft_osf extension, like xt_osf, is not supported from the output
path.

Fixes: b96af92d6eaf ("netfilter: nf_tables: implement Passive OS fingerprint module in nft_osf")
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/netfilter/nft_osf.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/net/netfilter/nft_osf.c b/net/netfilter/nft_osf.c
index a35fb59ace73..df4e3e0412ed 100644
--- a/net/netfilter/nft_osf.c
+++ b/net/netfilter/nft_osf.c
@@ -69,6 +69,15 @@ static int nft_osf_dump(struct sk_buff *skb, const struct nft_expr *expr)
 	return -1;
 }
 
+static int nft_osf_validate(const struct nft_ctx *ctx,
+			    const struct nft_expr *expr,
+			    const struct nft_data **data)
+{
+	return nft_chain_validate_hooks(ctx->chain, (1 << NF_INET_LOCAL_IN) |
+						    (1 << NF_INET_PRE_ROUTING) |
+						    (1 << NF_INET_FORWARD));
+}
+
 static struct nft_expr_type nft_osf_type;
 static const struct nft_expr_ops nft_osf_op = {
 	.eval		= nft_osf_eval,
@@ -76,6 +85,7 @@ static const struct nft_expr_ops nft_osf_op = {
 	.init		= nft_osf_init,
 	.dump		= nft_osf_dump,
 	.type		= &nft_osf_type,
+	.validate	= nft_osf_validate,
 };
 
 static struct nft_expr_type nft_osf_type __read_mostly = {
-- 
2.20.1


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Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20200116165502.8838-1-sashal@kernel.org>
2020-01-16 16:44 ` Sasha Levin [this message]
2020-01-16 16:44 ` [PATCH AUTOSEL 4.19 037/671] netfilter: nf_flow_table: do not remove offload when other netns's interface is down Sasha Levin

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