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authorPablo Neira Ayuso <pablo@netfilter.org>2021-03-30 16:24:11 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2021-03-31 01:12:47 +0200
commit0e07e25b481aa021e4b48085ecb8a049e9614510 (patch)
tree029ecb45b29558b9277c898887c660426a66a477 /net
parent9adc89af724f12a03b47099cd943ed54e877cd59 (diff)
netfilter: flowtable: fix NAT IPv6 offload mangling
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>
Diffstat (limited to 'net')
-rw-r--r--net/netfilter/nf_flow_table_offload.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/net/netfilter/nf_flow_table_offload.c b/net/netfilter/nf_flow_table_offload.c
index 2a6993fa40d7..1c5460e7bce8 100644
--- a/net/netfilter/nf_flow_table_offload.c
+++ b/net/netfilter/nf_flow_table_offload.c
@@ -305,12 +305,12 @@ 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);
}
}