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From: Pablo Neira Ayuso <pablo@netfilter.org>
To: netfilter-devel@vger.kernel.org
Cc: davem@davemloft.net, netdev@vger.kernel.org
Subject: [PATCH 4/4] netfilter: nft_tproxy: Fix port selector on Big Endian
Date: Thu, 26 Dec 2019 17:39:56 +0100
Message-ID: <20191226163956.672174-5-pablo@netfilter.org> (raw)
In-Reply-To: <20191226163956.672174-1-pablo@netfilter.org>

From: Phil Sutter <phil@nwl.cc>

On Big Endian architectures, u16 port value was extracted from the wrong
parts of u32 sreg_port, just like commit 10596608c4d62 ("netfilter:
nf_tables: fix mismatch in big-endian system") describes.

Fixes: 4ed8eb6570a49 ("netfilter: nf_tables: Add native tproxy support")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Acked-by: Florian Westphal <fw@strlen.de>
Acked-by: Máté Eckl <ecklm94@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nft_tproxy.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/netfilter/nft_tproxy.c b/net/netfilter/nft_tproxy.c
index f92a82c73880..95980154ef02 100644
--- a/net/netfilter/nft_tproxy.c
+++ b/net/netfilter/nft_tproxy.c
@@ -50,7 +50,7 @@ static void nft_tproxy_eval_v4(const struct nft_expr *expr,
 	taddr = nf_tproxy_laddr4(skb, taddr, iph->daddr);
 
 	if (priv->sreg_port)
-		tport = regs->data[priv->sreg_port];
+		tport = nft_reg_load16(&regs->data[priv->sreg_port]);
 	if (!tport)
 		tport = hp->dest;
 
@@ -117,7 +117,7 @@ static void nft_tproxy_eval_v6(const struct nft_expr *expr,
 	taddr = *nf_tproxy_laddr6(skb, &taddr, &iph->daddr);
 
 	if (priv->sreg_port)
-		tport = regs->data[priv->sreg_port];
+		tport = nft_reg_load16(&regs->data[priv->sreg_port]);
 	if (!tport)
 		tport = hp->dest;
 
-- 
2.11.0


  parent reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-26 16:39 [PATCH 0/4] Netfilter fixes for net Pablo Neira Ayuso
2019-12-26 16:39 ` [PATCH 1/4] netfilter: nf_flow_table: fix big-endian integer overflow Pablo Neira Ayuso
2019-12-26 16:39 ` [PATCH 2/4] selftests: netfilter: extend flowtable test script with dnat rule Pablo Neira Ayuso
2019-12-26 16:39 ` [PATCH 3/4] netfilter: ebtables: compat: reject all padding in matches/watchers Pablo Neira Ayuso
2019-12-26 16:39 ` Pablo Neira Ayuso [this message]
2019-12-26 21:11 ` [PATCH 0/4] Netfilter fixes for net David Miller

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