lib: Fix use-after-free bug in XPath parsing code.

(cherry picked from commit 82f5fdb0dbbc0c7b04861edeadf70c86c9342df2)

diff --git a/src/virt.c b/src/virt.c
index 2c6be3c..9f84908 100644 (file)
--- a/src/virt.c
+++ b/src/virt.c
@@ -196,8 +196,8 @@ guestfs___for_each_disk (guestfs_h *g,
     assert (xptype->nodesetval->nodeTab[0]);
     assert (xptype->nodesetval->nodeTab[0]->type == XML_ATTRIBUTE_NODE);
     xmlAttrPtr attr = (xmlAttrPtr) xptype->nodesetval->nodeTab[0];
-    xmlXPathFreeObject (xptype);
     char *type = (char *) xmlNodeListGetString (doc, attr->children, 1);
+    xmlXPathFreeObject (xptype);
 
     xmlXPathObjectPtr xpfilename;