From: Joseph Sutton <josephsutton@catalyst.net.nz>
Date: Wed, 15 Jun 2022 22:33:29 +0000 (+1200)
Subject: heimdal:kdc: Accommodate NULL data parameter in krb5_pac_get_buffer()
X-Git-Tag: samba-4.14.14~45
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6843c44a45044808f90687f85183e7111a465d1f;p=thirdparty%2Fsamba.git

heimdal:kdc: Accommodate NULL data parameter in krb5_pac_get_buffer()

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
---

diff --git a/source4/heimdal/lib/krb5/pac.c b/source4/heimdal/lib/krb5/pac.c
index 05bcc523080..100de904662 100644
--- a/source4/heimdal/lib/krb5/pac.c
+++ b/source4/heimdal/lib/krb5/pac.c
@@ -394,10 +394,12 @@ krb5_pac_get_buffer(krb5_context context, krb5_pac p,
 	if (p->pac->buffers[i].type != type)
 	    continue;
 
-	ret = krb5_data_copy(data, (unsigned char *)p->data.data + offset, len);
-	if (ret) {
-	    krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
-	    return ret;
+	if (data) {
+	    ret = krb5_data_copy(data, (unsigned char *)p->data.data + offset, len);
+	    if (ret) {
+		krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
+		return ret;
+	    }
 	}
 	return 0;
     }