target/linux/generic/patches-3.18/612-netfilter_match_reduce_memory_access.patch

   1 --- a/net/ipv4/netfilter/ip_tables.c
   2 +++ b/net/ipv4/netfilter/ip_tables.c
   3 @@ -85,9 +85,11 @@ ip_packet_match(const struct iphdr *ip,
   4         if (ipinfo->flags & IPT_F_NO_DEF_MATCH)
   5                 return true;
   6
   7 -       if (FWINV((ip->saddr&ipinfo->smsk.s_addr) != ipinfo->src.s_addr,
   8 +       if (FWINV(ipinfo->smsk.s_addr &&
   9 +                 (ip->saddr&ipinfo->smsk.s_addr) != ipinfo->src.s_addr,
  10                   IPT_INV_SRCIP) ||
  11 -           FWINV((ip->daddr&ipinfo->dmsk.s_addr) != ipinfo->dst.s_addr,
  12 +           FWINV(ipinfo->dmsk.s_addr &&
  13 +                 (ip->daddr&ipinfo->dmsk.s_addr) != ipinfo->dst.s_addr,
  14                   IPT_INV_DSTIP)) {
  15                 dprintf("Source or dest mismatch.\n");
  16