From: Pablo Neira Ayuso <pablo@netfilter.org>
To: netfilter-devel@vger.kernel.org
Subject: [PATCH] netfilter: flowtable: fix NAT IPv6 offload mangling
Date: Tue, 30 Mar 2021 16:24:11 +0200 [thread overview]
Message-ID: <20210330142411.11254-1-pablo@netfilter.org> (raw)
Fix out-of-bound access in the address array.
Fixes: 5c27d8d76ce8 ("netfilter: nf_flow_table_offload: add IPv6 support")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
net/netfilter/nf_flow_table_offload.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/net/netfilter/nf_flow_table_offload.c b/net/netfilter/nf_flow_table_offload.c
index 7d0d128407be..4f1a145ff74b 100644
--- a/net/netfilter/nf_flow_table_offload.c
+++ b/net/netfilter/nf_flow_table_offload.c
@@ -336,12 +336,12 @@ static void flow_offload_ipv6_mangle(struct nf_flow_rule *flow_rule,
const __be32 *addr, const __be32 *mask)
{
struct flow_action_entry *entry;
- int i;
+ int i, j;
- for (i = 0; i < sizeof(struct in6_addr) / sizeof(u32); i += sizeof(u32)) {
+ for (i = 0, j = 0; i < sizeof(struct in6_addr) / sizeof(u32); i += sizeof(u32), j++) {
entry = flow_action_entry_next(flow_rule);
flow_offload_mangle(entry, FLOW_ACT_MANGLE_HDR_TYPE_IP6,
- offset + i, &addr[i], mask);
+ offset + i, &addr[j], mask);
}
}
--
2.20.1
reply other threads:[~2021-03-30 14:25 UTC|newest]
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