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Make sure that we don't try to build an ASCONF-ACK chunk

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larger than what fits in the the mbuf cluster.
This issue was reported by Andrew Galante.

MFC after: 3 days
This commit is contained in:
Michael Tuexen 2013-11-07 17:08:09 +00:00
parent 460434b9e7
commit a9d94d290b
1 changed files with 2 additions and 1 deletions
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3
sys/netinet/sctp_asconf.c
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@ -2616,7 +2616,8 @@ sctp_compose_asconf(struct sctp_tcb *stcb, int *retlen, int addr_locked)
/* get the parameter length */
p_length = SCTP_SIZE32(aa->ap.aph.ph.param_length);
/* will it fit in current chunk? */
if (SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) {
if ((SCTP_BUF_LEN(m_asconf) + p_length > stcb->asoc.smallest_mtu) ||
(SCTP_BUF_LEN(m_asconf) + p_length > MCLBYTES)) {
/* won't fit, so we're done with this chunk */
break;
}