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/*
* xinclude.c: a libFuzzer target to test the XInclude engine.
*
* See Copyright for the status of this software.
*/
#include <libxml/catalog.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <libxml/xmlerror.h>
#include <libxml/xinclude.h>
#include "fuzz.h"
int
LLVMFuzzerInitialize(int *argc ATTRIBUTE_UNUSED,
char ***argv ATTRIBUTE_UNUSED) {
xmlFuzzMemSetup();
xmlInitParser();
#ifdef LIBXML_CATALOG_ENABLED
xmlInitializeCatalog();
xmlCatalogSetDefaults(XML_CATA_ALLOW_NONE);
#endif
xmlSetGenericErrorFunc(NULL, xmlFuzzErrorFunc);
return 0;
}
int
LLVMFuzzerTestOneInput(const char *data, size_t size) {
xmlParserCtxtPtr ctxt;
xmlDocPtr doc;
const char *docBuffer, *docUrl;
size_t failurePos, docSize;
int opts;
xmlFuzzDataInit(data, size);
opts = (int) xmlFuzzReadInt(4);
opts &= ~XML_PARSE_DTDVALID &
~XML_PARSE_SAX1;
failurePos = xmlFuzzReadInt(4) % (size + 100);
xmlFuzzReadEntities();
docBuffer = xmlFuzzMainEntity(&docSize);
docUrl = xmlFuzzMainUrl();
if (docBuffer == NULL)
goto exit;
/* Pull parser */
xmlFuzzInjectFailure(failurePos);
ctxt = xmlNewParserCtxt();
if (ctxt != NULL) {
xmlXIncludeCtxtPtr xinc;
xmlDocPtr copy;
xmlCtxtSetResourceLoader(ctxt, xmlFuzzResourceLoader, NULL);
doc = xmlCtxtReadMemory(ctxt, docBuffer, docSize, docUrl, NULL, opts);
xmlFuzzCheckFailureReport("xmlCtxtReadMemory",
doc == NULL && ctxt->errNo == XML_ERR_NO_MEMORY,
doc == NULL && ctxt->errNo == XML_IO_EIO);
xinc = xmlXIncludeNewContext(doc);
xmlXIncludeSetResourceLoader(xinc, xmlFuzzResourceLoader, NULL);
xmlXIncludeSetFlags(xinc, opts);
xmlXIncludeProcessNode(xinc, (xmlNodePtr) doc);
if (doc != NULL) {
xmlFuzzCheckFailureReport("xmlXIncludeProcessNode",
xinc == NULL ||
xmlXIncludeGetLastError(xinc) == XML_ERR_NO_MEMORY,
xinc != NULL &&
xmlXIncludeGetLastError(xinc) == XML_IO_EIO);
}
xmlXIncludeFreeContext(xinc);
xmlFuzzResetFailure();
copy = xmlCopyDoc(doc, 1);
if (doc != NULL)
xmlFuzzCheckFailureReport("xmlCopyNode", copy == NULL, 0);
xmlFreeDoc(copy);
xmlFreeDoc(doc);
xmlFreeParserCtxt(ctxt);
}
exit:
xmlFuzzInjectFailure(0);
xmlFuzzDataCleanup();
xmlResetLastError();
return(0);
}
size_t
LLVMFuzzerCustomMutator(char *data, size_t size, size_t maxSize,
unsigned seed) {
static const xmlFuzzChunkDesc chunks[] = {
{ 4, XML_FUZZ_PROB_ONE / 10 }, /* opts */
{ 4, XML_FUZZ_PROB_ONE / 10 }, /* failurePos */
{ 0, 0 }
};
return xmlFuzzMutateChunks(chunks, data, size, maxSize, seed,
LLVMFuzzerMutate);
}
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