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writer: Add a few extra NULL checks to avoid memory leaks on corrupt writer path.

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This commit is contained in:
Peter Fordham
2025-12-12 20:00:25 -08:00
parent aef94414c6
commit cee7107a1b
1 changed files with 5 additions and 2 deletions
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7
xmlwriter.c
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@@ -1014,7 +1014,7 @@ xmlTextWriterStartElementNS(xmlTextWriter *writer,
int sum;
xmlChar *buf;
if ((writer == NULL) || (name == NULL) || (*name == '\0'))
if ((writer == NULL) || (writer->nsstack == NULL) || (name == NULL) || (*name == '\0'))
return -1;
buf = NULL;
@@ -1759,7 +1759,7 @@ xmlTextWriterStartAttributeNS(xmlTextWriter *writer,
xmlChar *buf;
xmlTextWriterNsStackEntry *p;
if ((writer == NULL) || (name == NULL) || (*name == '\0'))
if ((writer == NULL) || (writer->nsstack == NULL) || (name == NULL) || (*name == '\0'))
return -1;
/* Handle namespace first in case of error */
@@ -4167,6 +4167,9 @@ xmlTextWriterOutputNSDecl(xmlTextWriterPtr writer)
int count;
int sum;
if ((writer == NULL) || (writer->nsstack == NULL))
return -1;
sum = 0;
while (!xmlListEmpty(writer->nsstack)) {
xmlChar *namespaceURI = NULL;