Module: kamailio Branch: master Commit: d0ed04ae7938ef09da1ca215043334190adb9c52 URL: https://github.com/kamailio/kamailio/commit/d0ed04ae7938ef09da1ca2150433341… Author: Daniel-Constantin Mierla <miconda(a)gmail.com> Committer: Daniel-Constantin Mierla <miconda(a)gmail.com> Date: 2019-09-20T19:25:26+02:00 xcap_server: free xpath object before reusing the variable - removed unnecessary resets of local variables at the end of function --- Modified: src/modules/xcap_server/xcap_misc.c --- Diff: https://github.com/kamailio/kamailio/commit/d0ed04ae7938ef09da1ca2150433341… Patch: https://github.com/kamailio/kamailio/commit/d0ed04ae7938ef09da1ca2150433341… --- diff --git a/src/modules/xcap_server/xcap_misc.c b/src/modules/xcap_server/xcap_misc.c index bc09ce70d8..8c04bbe27c 100644 --- a/src/modules/xcap_server/xcap_misc.c +++ b/src/modules/xcap_server/xcap_misc.c @@ -436,8 +436,8 @@ int xcaps_xpath_set(str *inbuf, str *xpaths, str *val, str *outbuf) { xmlDocPtr doc = NULL; xmlDocPtr newnode = NULL; - xmlXPathContextPtr xpathCtx = NULL; - xmlXPathObjectPtr xpathObj = NULL; + xmlXPathContextPtr xpathCtx = NULL; + xmlXPathObjectPtr xpathObj = NULL; xmlNodeSetPtr nodes; const xmlChar* value = NULL; xmlChar *xmem = NULL; @@ -466,7 +466,7 @@ int xcaps_xpath_set(str *inbuf, str *xpaths, str *val, str *outbuf) LM_ERR("unable to create new XPath context\n"); goto error; } - + /* Evaluate xpath expression */ xpathObj = xmlXPathEvalExpression( (const xmlChar*)xpaths->s, xpathCtx); @@ -488,6 +488,7 @@ int xcaps_xpath_set(str *inbuf, str *xpaths, str *val, str *outbuf) goto done; /* evaluate xpath expression for parrent node */ *p = 0; + xmlXPathFreeObject(xpathObj); xpathObj = xmlXPathEvalExpression( (const xmlChar*)xpaths->s, xpathCtx); if(xpathObj == NULL) @@ -525,7 +526,7 @@ int xcaps_xpath_set(str *inbuf, str *xpaths, str *val, str *outbuf) size = nodes->nodeNr; if(val!=NULL) value = (const xmlChar*)val->s; - + /* * NOTE: the nodes are processed in reverse order, i.e. reverse document * order because xmlNodeSetContent can actually free up descendant @@ -561,7 +562,7 @@ int xcaps_xpath_set(str *inbuf, str *xpaths, str *val, str *outbuf) * This can be exercised by running * valgrind xpath2 test3.xml '//discarded' discarded * There is 2 ways around it: - * - make a copy of the pointers to the nodes from the result set + * - make a copy of the pointers to the nodes from the result set * then call xmlXPathFreeObject() and then modify the nodes * or * - remove the reference to the modified nodes from the node set @@ -599,22 +600,16 @@ int xcaps_xpath_set(str *inbuf, str *xpaths, str *val, str *outbuf) done: if(xpathObj!=NULL) xmlXPathFreeObject(xpathObj); - if(xpathCtx!=NULL) xmlXPathFreeContext(xpathCtx); + if(xpathCtx!=NULL) xmlXPathFreeContext(xpathCtx); if(doc!=NULL) xmlFreeDoc(doc); if(newnode!=NULL) xmlFreeDoc(newnode); - xpathObj = NULL; - xpathCtx = NULL; - doc = NULL; return 0; error: if(xpathObj!=NULL) xmlXPathFreeObject(xpathObj); - if(xpathCtx!=NULL) xmlXPathFreeContext(xpathCtx); + if(xpathCtx!=NULL) xmlXPathFreeContext(xpathCtx); if(doc!=NULL) xmlFreeDoc(doc); if(newnode!=NULL) xmlFreeDoc(newnode); - xpathObj = NULL; - xpathCtx = NULL; - doc = NULL; outbuf->s = NULL; outbuf->len = 0; return -1;