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xmllint: Fix memory leak in walkDoc

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This commit is contained in:
Nick Wellnhofer 2024-05-06 02:34:01 +02:00
parent a7854e2646
commit 907a5a4885
1 changed files with 47 additions and 35 deletions
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30
xmllint.c
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@ -1939,6 +1939,7 @@ static void walkDoc(xmlDocPtr doc) {
int ret;
#ifdef LIBXML_PATTERN_ENABLED
if (pattern != NULL) {
xmlNodePtr root;
const xmlChar *namespaces[22];
int i;
@ -1958,25 +1959,30 @@ static void walkDoc(xmlDocPtr doc) {
namespaces[i++] = NULL;
namespaces[i] = NULL;
if (pattern != NULL) {
patternc = xmlPatterncompile((const xmlChar *) pattern, doc->dict,
0, &namespaces[0]);
ret = xmlPatternCompileSafe((const xmlChar *) pattern, doc->dict,
0, &namespaces[0], &patternc);
if (patternc == NULL) {
if (ret < 0) {
progresult = XMLLINT_ERR_MEM;
} else {
fprintf(ERR_STREAM,
"Pattern %s failed to compile\n", pattern);
progresult = XMLLINT_ERR_SCHEMAPAT;
pattern = NULL;
}
goto error;
}
if (patternc != NULL) {
patstream = xmlPatternGetStreamCtxt(patternc);
if (patstream != NULL) {
if (patstream == NULL) {
progresult = XMLLINT_ERR_MEM;
goto error;
}
ret = xmlStreamPush(patstream, NULL, NULL);
if (ret < 0) {
fprintf(ERR_STREAM, "xmlStreamPush() failure\n");
xmlFreeStreamCtxt(patstream);
patstream = NULL;
}
progresult = XMLLINT_ERR_MEM;
goto error;
}
}
#endif /* LIBXML_PATTERN_ENABLED */
@ -2007,7 +2013,13 @@ static void walkDoc(xmlDocPtr doc) {
fprintf(ERR_STREAM, "Failed to crate a reader from the document\n");
progresult = XMLLINT_ERR_UNCLASS;
}
#ifdef LIBXML_PATTERN_ENABLED
error:
if (patternc != NULL) {
xmlFreePattern(patternc);
patternc = NULL;
}
if (patstream != NULL) {
xmlFreeStreamCtxt(patstream);
patstream = NULL;