diff options
Diffstat (limited to 'net/sctp/chunk.c')
| -rw-r--r-- | net/sctp/chunk.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/net/sctp/chunk.c b/net/sctp/chunk.c index 991a530c6b31..f889a84f264d 100644 --- a/net/sctp/chunk.c +++ b/net/sctp/chunk.c @@ -168,6 +168,7 @@ struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *asoc, { size_t len, first_len, max_data, remaining; size_t msg_len = iov_iter_count(from); + struct sctp_shared_key *shkey = NULL; struct list_head *pos, *temp; struct sctp_chunk *chunk; struct sctp_datamsg *msg; @@ -204,6 +205,17 @@ struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *asoc, if (hmac_desc) max_data -= SCTP_PAD4(sizeof(struct sctp_auth_chunk) + hmac_desc->hmac_len); + + if (sinfo->sinfo_tsn && + sinfo->sinfo_ssn != asoc->active_key_id) { + shkey = sctp_auth_get_shkey(asoc, sinfo->sinfo_ssn); + if (!shkey) { + err = -EINVAL; + goto errout; + } + } else { + shkey = asoc->shkey; + } } /* Check what's our max considering the above */ @@ -275,6 +287,8 @@ struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *asoc, if (err < 0) goto errout_chunk_free; + chunk->shkey = shkey; + /* Put the chunk->skb back into the form expected by send. */ __skb_pull(chunk->skb, (__u8 *)chunk->chunk_hdr - chunk->skb->data); |