[PATCH 4.19 041/115] netfilter: nft_tproxy: Fix port selector on Big Endian

Greg Kroah-Hartman
2020-01-07T21:05:34Z

From: Phil Sutter <phil@nwl.cc>

[ Upstream commit 8cb4ec44de42b99b92399b4d1daf3dc430ed0186 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.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;

--
2.20.1