tree 8429227bffe3b709ddce84b0e841a8ccb851f6b9
parent 18bed89107a400af0d672ec85a270f1545db2569
author Xin Long <lucien.xin@gmail.com> 1552909620 +0800
committer David S. Miller <davem@davemloft.net> 1552958172 -0700

sctp: get sctphdr by offset in sctp_compute_cksum

sctp_hdr(skb) only works when skb->transport_header is set properly.

But in Netfilter, skb->transport_header for ipv6 is not guaranteed
to be right value for sctphdr. It would cause to fail to check the
checksum for sctp packets.

So fix it by using offset, which is always right in all places.

v1->v2:
  - Fix the changelog.

Fixes: e6d8b64b34aa ("net: sctp: fix and consolidate SCTP checksumming code")
Reported-by: Li Shuang <shuali@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>