From: Jouni Malinen <jouni@qca.qualcomm.com>
Date: Wed, 16 Mar 2016 19:49:28 +0000 (+0200)
Subject: libxml2: Check for xmlDocDumpFormatMemory() error case
X-Git-Tag: hostap_2_6~713
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=64ce5905f85fc9db2ff66e1d2e0e0355092ced02;p=thirdparty%2Fhostap.git

libxml2: Check for xmlDocDumpFormatMemory() error case

Since this function needs to allocate memory, it might fail. Check that
the returned memory pointer is not NULL before trying to parse the
output.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
---

diff --git a/src/utils/xml_libxml2.c b/src/utils/xml_libxml2.c
index c92839461..7b6d2764b 100644
--- a/src/utils/xml_libxml2.c
+++ b/src/utils/xml_libxml2.c
@@ -212,6 +212,8 @@ char * xml_node_to_str(struct xml_node_ctx *ctx, xml_node_t *node)
 	xmlDocSetRootElement(doc, n);
 	xmlDocDumpFormatMemory(doc, &buf, &bufsiz, 0);
 	xmlFreeDoc(doc);
+	if (!buf)
+		return NULL;
 	pos = (char *) buf;
 	if (strncmp(pos, "<?xml", 5) == 0) {
 		pos = strchr(pos, '>');