blob: a5eb70b2e7311a59377f4eb47ef5cdcb63eb8a8d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
/*
* xpath.c: a libFuzzer target to test XPath and XPointer expressions.
*
* See Copyright for the status of this software.
*/
#include <libxml/parser.h>
#include <libxml/xpointer.h>
#include "fuzz.h"
int
LLVMFuzzerInitialize(int *argc ATTRIBUTE_UNUSED,
char ***argv ATTRIBUTE_UNUSED) {
xmlFuzzMemSetup();
xmlInitParser();
xmlSetGenericErrorFunc(NULL, xmlFuzzErrorFunc);
return 0;
}
int
LLVMFuzzerTestOneInput(const char *data, size_t size) {
xmlDocPtr doc;
const char *expr, *xml;
size_t maxAlloc, exprSize, xmlSize;
if (size > 10000)
return(0);
xmlFuzzDataInit(data, size);
maxAlloc = xmlFuzzReadInt(4) % (size + 1);
expr = xmlFuzzReadString(&exprSize);
xml = xmlFuzzReadString(&xmlSize);
/* Recovery mode allows more input to be fuzzed. */
doc = xmlReadMemory(xml, xmlSize, NULL, NULL, XML_PARSE_RECOVER);
if (doc != NULL) {
xmlXPathContextPtr xpctxt;
xmlFuzzMemSetLimit(maxAlloc);
xpctxt = xmlXPathNewContext(doc);
if (xpctxt != NULL) {
/* Operation limit to avoid timeout */
xpctxt->opLimit = 500000;
xmlXPathFreeObject(xmlXPtrEval(BAD_CAST expr, xpctxt));
xmlXPathFreeContext(xpctxt);
}
xmlFuzzMemSetLimit(0);
xmlFreeDoc(doc);
}
xmlFuzzDataCleanup();
xmlResetLastError();
return(0);
}
|
