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09dac45ab9
XIncludes involve XPath processing which can still lead to timeouts when fuzzing. This will probably take a while to fix. The rest of the XML parsing code should hopefully run without timeouts now. OSS-Fuzz only shows a single timeout test case, so separate the XInclude from the core XML fuzzer.
74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
/*
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* xinclude.c: a libFuzzer target to test the XInclude engine.
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*
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* See Copyright for the status of this software.
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*/
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#include <libxml/catalog.h>
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#include <libxml/parser.h>
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#include <libxml/tree.h>
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#include <libxml/xmlerror.h>
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#include <libxml/xinclude.h>
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#include <libxml/xmlreader.h>
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#include "fuzz.h"
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int
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LLVMFuzzerInitialize(int *argc ATTRIBUTE_UNUSED,
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char ***argv ATTRIBUTE_UNUSED) {
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xmlInitParser();
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#ifdef LIBXML_CATALOG_ENABLED
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xmlInitializeCatalog();
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#endif
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xmlSetGenericErrorFunc(NULL, xmlFuzzErrorFunc);
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xmlSetExternalEntityLoader(xmlFuzzEntityLoader);
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return 0;
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}
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int
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LLVMFuzzerTestOneInput(const char *data, size_t size) {
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xmlDocPtr doc;
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xmlTextReaderPtr reader;
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const char *docBuffer, *docUrl;
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size_t docSize;
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int opts;
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xmlFuzzDataInit(data, size);
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opts = xmlFuzzReadInt();
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opts |= XML_PARSE_XINCLUDE;
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xmlFuzzReadEntities();
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docBuffer = xmlFuzzMainEntity(&docSize);
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docUrl = xmlFuzzMainUrl();
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if (docBuffer == NULL)
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goto exit;
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/* Pull parser */
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doc = xmlReadMemory(docBuffer, docSize, docUrl, NULL, opts);
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xmlXIncludeProcessFlags(doc, opts);
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xmlFreeDoc(doc);
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/* Reader */
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reader = xmlReaderForMemory(docBuffer, docSize, NULL, NULL, opts);
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if (reader == NULL)
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goto exit;
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while (xmlTextReaderRead(reader) == 1) {
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if (xmlTextReaderNodeType(reader) == XML_ELEMENT_NODE) {
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int i, n = xmlTextReaderAttributeCount(reader);
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for (i=0; i<n; i++) {
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xmlTextReaderMoveToAttributeNo(reader, i);
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while (xmlTextReaderReadAttributeValue(reader) == 1);
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}
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}
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}
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xmlFreeTextReader(reader);
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exit:
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xmlFuzzDataCleanup();
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xmlResetLastError();
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return(0);
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}
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