Author: tuexen
Date: Thu May 16 11:20:02 2019
New Revision: 347688
URL: https://svnweb.freebsd.org/changeset/base/347688
Log:
MFC r346402:
When a checksum has to be computed for a received IPv6 packet because it
is requested by the application using the IPPROTO_IPV6 level socket option
IPV6_CHECKSUM on a raw socket, ensure that the packet contains enough
bytes to contain the checksum at the specified offset.
Modified:
stable/11/sys/netinet6/raw_ip6.c
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/netinet6/raw_ip6.c
==============================================================================
--- stable/11/sys/netinet6/raw_ip6.c Thu May 16 11:18:50 2019
(r347687)
+++ stable/11/sys/netinet6/raw_ip6.c Thu May 16 11:20:02 2019
(r347688)
@@ -198,7 +198,8 @@ rip6_input(struct mbuf **mp, int *offp, int proto)
INP_RLOCK(in6p);
if (in6p->in6p_cksum != -1) {
RIP6STAT_INC(rip6s_isum);
- if (in6_cksum(m, proto, *offp,
+ if (m->m_pkthdr.len - (*offp + in6p->in6p_cksum) < 2 ||
+ in6_cksum(m, proto, *offp,
m->m_pkthdr.len - *offp)) {
INP_RUNLOCK(in6p);
RIP6STAT_INC(rip6s_badsum);
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