- (dtucker) [openbsd-compat/getrrsetbyname-ldns.c] bz #2022: prevent null

   pointer deref in the client when built with LDNS and using DNSSEC with a
   CNAME.  Patch from gregdlg+mr at hochet info.

2 files changed, 7 insertions, 1 deletions

diff --git a/ChangeLog b/ChangeLog
index 499d3d2a1..1de0165be 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+20120628
+ - (dtucker) [openbsd-compat/getrrsetbyname-ldns.c] bz #2022: prevent null
+   pointer deref in the client when built with LDNS and using DNSSEC with a
+   CNAME.  Patch from gregdlg+mr at hochet info.
+
 20120622
  - (dtucker) [contrib/cygwin/ssh-host-config] Ensure that user sshd runs as
    can logon as a service.  Patch from vinschen at redhat com.
diff --git a/openbsd-compat/getrrsetbyname-ldns.c b/openbsd-compat/getrrsetbyname-ldns.c
index 8ce5678c9..19666346b 100644
--- a/openbsd-compat/getrrsetbyname-ldns.c
+++ b/openbsd-compat/getrrsetbyname-ldns.c
@@ -205,7 +205,8 @@ getrrsetbyname(const char *hostname, unsigned int rdclass,
                 }
 
                 if (rr->_rr_class == rrset->rri_rdclass &&
-                    rr->_rr_type == LDNS_RR_TYPE_RRSIG) {
+                    rr->_rr_type == LDNS_RR_TYPE_RRSIG &&
+                    rrset->rri_sigs) {
                         rdata = &rrset->rri_sigs[index_sig++];
                 }