From: Pablo Neira Ayuso pablo@netfilter.org
commit 0e07e25b481aa021e4b48085ecb8a049e9614510 upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/netfilter/nf_flow_table_offload.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
--- 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(str 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); } }