diff options
| author | Praveen Chaudhary <praveen5582@gmail.com> | 2020-01-23 12:33:28 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-05 14:18:28 +0000 |
| commit | 9b7a4bed4c7894442fd0f339b84e022a02174c5d (patch) | |
| tree | 743d50dd0b495269e943a5a912121c945a1217ae /fs | |
| parent | 964646964ef4028148b5916f6ad5b55a2d9c9152 (diff) | |
net: Fix skb->csum update in inet_proto_csum_replace16().
[ Upstream commit 189c9b1e94539b11c80636bc13e9cf47529e7bba ]
skb->csum is updated incorrectly, when manipulation for
NF_NAT_MANIP_SRC\DST is done on IPV6 packet.
Fix:
There is no need to update skb->csum in inet_proto_csum_replace16(),
because update in two fields a.) IPv6 src/dst address and b.) L4 header
checksum cancels each other for skb->csum calculation. Whereas
inet_proto_csum_replace4 function needs to update skb->csum, because
update in 3 fields a.) IPv4 src/dst address, b.) IPv4 Header checksum
and c.) L4 header checksum results in same diff as L4 Header checksum
for skb->csum calculation.
[ pablo@netfilter.org: a few comestic documentation edits ]
Signed-off-by: Praveen Chaudhary <pchaudhary@linkedin.com>
Signed-off-by: Zhenggen Xu <zxu@linkedin.com>
Signed-off-by: Andy Stracner <astracner@linkedin.com>
Reviewed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions