target/linux/generic/backport-4.14/365-netfilter-nf_flow_table-fix-checksum-when-handling-D.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Sun, 25 Feb 2018 17:22:55 +0100
   3 Subject: [PATCH] netfilter: nf_flow_table: fix checksum when handling DNAT
   4
   5 Add a missing call to csum_replace4 like on SNAT
   6
   7 Signed-off-by: Felix Fietkau <nbd@nbd.name>
   8 ---
   9
  10 --- a/net/netfilter/nf_flow_table_ip.c
  11 +++ b/net/netfilter/nf_flow_table_ip.c
  12 @@ -130,6 +130,7 @@ static int nf_flow_dnat_ip(const struct
  13         default:
  14                 return -1;
  15         }
  16 +       csum_replace4(&iph->check, addr, new_addr);
  17
  18         return nf_flow_nat_ip_l4proto(skb, iph, thoff, addr, new_addr);
  19  }