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libxml2: add multiple security patches

Browse Source 
Fixes for CVE-2011-1944, CVE-2011-2821, CVE-2011-2834, CVE-2011-3919,
CVE-2012-0841 and others from upstream.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
This commit is contained in:
Gustavo Zacarias 2012-03-02 12:00:35 -03:00 committed by Peter Korsgaard
parent 584dbc2f0a
commit aa5d9ba3b8
9 changed files with 795 additions and 0 deletions
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21
package/libxml2/libxml2-2.7.8-allocation-error-copying-entities.patch Normal file
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@ -0,0 +1,21 @@
From 5bd3c061823a8499b27422aee04ea20aae24f03e Mon Sep 17 00:00:00 2001
From: Daniel Veillard <veillard@redhat.com>
Date: Fri, 16 Dec 2011 10:53:35 +0000
Subject: Fix an allocation error when copying entities
---
diff --git a/parser.c b/parser.c
index 4e5dcb9..c55e41d 100644
--- a/parser.c
+++ b/parser.c
@@ -2709,7 +2709,7 @@ xmlStringLenDecodeEntities(xmlParserCtxtPtr ctxt, const xmlChar *str, int len,
buffer[nbchars++] = '&';
if (nbchars > buffer_size - i - XML_PARSER_BUFFER_SIZE) {
- growBuffer(buffer, XML_PARSER_BUFFER_SIZE);
+ growBuffer(buffer, i + XML_PARSER_BUFFER_SIZE);
}
for (;i > 0;i--)
buffer[nbchars++] = *cur++;
--
cgit v0.9.0.2

62
package/libxml2/libxml2-2.7.8-error-xpath.patch Normal file
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@ -0,0 +1,62 @@
From 1d4526f6f4ec8d18c40e2a09b387652a6c1aa2cd Mon Sep 17 00:00:00 2001
From: Daniel Veillard <veillard@redhat.com>
Date: Tue, 11 Oct 2011 08:34:34 +0000
Subject: Fix missing error status in XPath evaluation
Started by Chris Evans, I added a few more place where the
error should have been set in the evaluation context.
---
diff --git a/xpath.c b/xpath.c
index bcee2ea..d9d902c 100644
--- a/xpath.c
+++ b/xpath.c
@@ -2485,6 +2485,7 @@ valuePush(xmlXPathParserContextPtr ctxt, xmlXPathObjectPtr value)
sizeof(ctxt->valueTab[0]));
if (tmp == NULL) {
xmlGenericError(xmlGenericErrorContext, "realloc failed !\n");
+ ctxt->error = XPATH_MEMORY_ERROR;
return (0);
}
ctxt->valueMax *= 2;
@@ -9340,6 +9341,7 @@ xmlXPathTranslateFunction(xmlXPathParserContextPtr ctxt, int nargs) {
if ( (ch & 0xc0) != 0xc0 ) {
xmlGenericError(xmlGenericErrorContext,
"xmlXPathTranslateFunction: Invalid UTF8 string\n");
+ /* not asserting an XPath error is probably better */
break;
}
/* then skip over remaining bytes for this char */
@@ -9347,6 +9349,7 @@ xmlXPathTranslateFunction(xmlXPathParserContextPtr ctxt, int nargs) {
if ( (*cptr++ & 0xc0) != 0x80 ) {
xmlGenericError(xmlGenericErrorContext,
"xmlXPathTranslateFunction: Invalid UTF8 string\n");
+ /* not asserting an XPath error is probably better */
break;
}
if (ch & 0x80) /* must have had error encountered */
@@ -13410,6 +13413,7 @@ xmlXPathCompOpEval(xmlXPathParserContextPtr ctxt, xmlXPathStepOpPtr op)
xmlGenericError(xmlGenericErrorContext,
"xmlXPathCompOpEval: variable %s bound to undefined prefix %s\n",
(char *) op->value4, (char *)op->value5);
+ ctxt->error = XPATH_UNDEF_PREFIX_ERROR;
return (total);
}
val = xmlXPathVariableLookupNS(ctxt->context,
@@ -13464,6 +13468,7 @@ xmlXPathCompOpEval(xmlXPathParserContextPtr ctxt, xmlXPathStepOpPtr op)
"xmlXPathCompOpEval: function %s bound to undefined prefix %s\n",
(char *)op->value4, (char *)op->value5);
xmlXPathPopFrame(ctxt, frame);
+ ctxt->error = XPATH_UNDEF_PREFIX_ERROR;
return (total);
}
func = xmlXPathFunctionLookupNS(ctxt->context,
@@ -14042,6 +14047,7 @@ xmlXPathCompOpEval(xmlXPathParserContextPtr ctxt, xmlXPathStepOpPtr op)
}
xmlGenericError(xmlGenericErrorContext,
"XPath: unknown precompiled operation %d\n", op->op);
+ ctxt->error = XPATH_INVALID_OPERAND;
return (total);
}
--
cgit v0.9.0.2

224
package/libxml2/libxml2-2.7.8-hardening-xpath.patch Normal file
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@ -0,0 +1,224 @@
From f5048b3e71fc30ad096970b8df6e7af073bae4cb Mon Sep 17 00:00:00 2001
From: Daniel Veillard <veillard@redhat.com>
Date: Thu, 18 Aug 2011 09:10:13 +0000
Subject: Hardening of XPath evaluation
Add a mechanism of frame for XPath evaluation when entering a function
or a scoped evaluation, also fix a potential problem in predicate
evaluation.
---
diff --git a/include/libxml/xpath.h b/include/libxml/xpath.h
index 1a9e30e..ddd9dd8 100644
--- a/include/libxml/xpath.h
+++ b/include/libxml/xpath.h
@@ -68,7 +68,8 @@ typedef enum {
XPATH_UNDEF_PREFIX_ERROR,
XPATH_ENCODING_ERROR,
XPATH_INVALID_CHAR_ERROR,
- XPATH_INVALID_CTXT
+ XPATH_INVALID_CTXT,
+ XPATH_STACK_ERROR
} xmlXPathError;
/*
@@ -380,6 +381,8 @@ struct _xmlXPathParserContext {
xmlXPathCompExprPtr comp; /* the precompiled expression */
int xptr; /* it this an XPointer expression */
xmlNodePtr ancestor; /* used for walking preceding axis */
+
+ int valueFrame; /* used to limit Pop on the stack */
};
/************************************************************************
diff --git a/xpath.c b/xpath.c
index b59ac5a..bcee2ea 100644
--- a/xpath.c
+++ b/xpath.c
@@ -252,6 +252,7 @@ static const char *xmlXPathErrorMessages[] = {
"Encoding error\n",
"Char out of XML range\n",
"Invalid or incomplete context\n",
+ "Stack usage errror\n",
"?? Unknown error ??\n" /* Must be last in the list! */
};
#define MAXERRNO ((int)(sizeof(xmlXPathErrorMessages) / \
@@ -2398,6 +2399,42 @@ xmlXPathCacheConvertNumber(xmlXPathContextPtr ctxt, xmlXPathObjectPtr val) {
************************************************************************/
/**
+ * xmlXPathSetFrame:
+ * @ctxt: an XPath parser context
+ *
+ * Set the callee evaluation frame
+ *
+ * Returns the previous frame value to be restored once done
+ */
+static int
+xmlXPathSetFrame(xmlXPathParserContextPtr ctxt) {
+ int ret;
+
+ if (ctxt == NULL)
+ return(0);
+ ret = ctxt->valueFrame;
+ ctxt->valueFrame = ctxt->valueNr;
+ return(ret);
+}
+
+/**
+ * xmlXPathPopFrame:
+ * @ctxt: an XPath parser context
+ * @frame: the previous frame value
+ *
+ * Remove the callee evaluation frame
+ */
+static void
+xmlXPathPopFrame(xmlXPathParserContextPtr ctxt, int frame) {
+ if (ctxt == NULL)
+ return;
+ if (ctxt->valueNr < ctxt->valueFrame) {
+ xmlXPatherror(ctxt, __FILE__, __LINE__, XPATH_STACK_ERROR);
+ }
+ ctxt->valueFrame = frame;
+}
+
+/**
* valuePop:
* @ctxt: an XPath evaluation context
*
@@ -2412,6 +2449,12 @@ valuePop(xmlXPathParserContextPtr ctxt)
if ((ctxt == NULL) || (ctxt->valueNr <= 0))
return (NULL);
+
+ if (ctxt->valueNr <= ctxt->valueFrame) {
+ xmlXPatherror(ctxt, __FILE__, __LINE__, XPATH_STACK_ERROR);
+ return (NULL);
+ }
+
ctxt->valueNr--;
if (ctxt->valueNr > 0)
ctxt->value = ctxt->valueTab[ctxt->valueNr - 1];
@@ -6154,6 +6197,7 @@ xmlXPathCompParserContext(xmlXPathCompExprPtr comp, xmlXPathContextPtr ctxt) {
ret->valueNr = 0;
ret->valueMax = 10;
ret->value = NULL;
+ ret->valueFrame = 0;
ret->context = ctxt;
ret->comp = comp;
@@ -11711,6 +11755,7 @@ xmlXPathCompOpEvalPositionalPredicate(xmlXPathParserContextPtr ctxt,
xmlXPathObjectPtr contextObj = NULL, exprRes = NULL;
xmlNodePtr oldContextNode, contextNode = NULL;
xmlXPathContextPtr xpctxt = ctxt->context;
+ int frame;
#ifdef LIBXML_XPTR_ENABLED
/*
@@ -11730,6 +11775,8 @@ xmlXPathCompOpEvalPositionalPredicate(xmlXPathParserContextPtr ctxt,
*/
exprOp = &ctxt->comp->steps[op->ch2];
for (i = 0; i < set->nodeNr; i++) {
+ xmlXPathObjectPtr tmp;
+
if (set->nodeTab[i] == NULL)
continue;
@@ -11757,23 +11804,25 @@ xmlXPathCompOpEvalPositionalPredicate(xmlXPathParserContextPtr ctxt,
xmlXPathNodeSetAddUnique(contextObj->nodesetval,
contextNode);
+ frame = xmlXPathSetFrame(ctxt);
valuePush(ctxt, contextObj);
res = xmlXPathCompOpEvalToBoolean(ctxt, exprOp, 1);
+ tmp = valuePop(ctxt);
+ xmlXPathPopFrame(ctxt, frame);
if ((ctxt->error != XPATH_EXPRESSION_OK) || (res == -1)) {
- xmlXPathObjectPtr tmp;
- /* pop the result if any */
- tmp = valuePop(ctxt);
- if (tmp != contextObj) {
+ while (tmp != contextObj) {
/*
* Free up the result
* then pop off contextObj, which will be freed later
*/
xmlXPathReleaseObject(xpctxt, tmp);
- valuePop(ctxt);
+ tmp = valuePop(ctxt);
}
goto evaluation_error;
}
+ /* push the result back onto the stack */
+ valuePush(ctxt, tmp);
if (res)
pos++;
@@ -13377,7 +13426,9 @@ xmlXPathCompOpEval(xmlXPathParserContextPtr ctxt, xmlXPathStepOpPtr op)
xmlXPathFunction func;
const xmlChar *oldFunc, *oldFuncURI;
int i;
+ int frame;
+ frame = xmlXPathSetFrame(ctxt);
if (op->ch1 != -1)
total +=
xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]);
@@ -13385,15 +13436,18 @@ xmlXPathCompOpEval(xmlXPathParserContextPtr ctxt, xmlXPathStepOpPtr op)
xmlGenericError(xmlGenericErrorContext,
"xmlXPathCompOpEval: parameter error\n");
ctxt->error = XPATH_INVALID_OPERAND;
+ xmlXPathPopFrame(ctxt, frame);
return (total);
}
- for (i = 0; i < op->value; i++)
+ for (i = 0; i < op->value; i++) {
if (ctxt->valueTab[(ctxt->valueNr - 1) - i] == NULL) {
xmlGenericError(xmlGenericErrorContext,
"xmlXPathCompOpEval: parameter error\n");
ctxt->error = XPATH_INVALID_OPERAND;
+ xmlXPathPopFrame(ctxt, frame);
return (total);
}
+ }
if (op->cache != NULL)
XML_CAST_FPTR(func) = op->cache;
else {
@@ -13409,6 +13463,7 @@ xmlXPathCompOpEval(xmlXPathParserContextPtr ctxt, xmlXPathStepOpPtr op)
xmlGenericError(xmlGenericErrorContext,
"xmlXPathCompOpEval: function %s bound to undefined prefix %s\n",
(char *)op->value4, (char *)op->value5);
+ xmlXPathPopFrame(ctxt, frame);
return (total);
}
func = xmlXPathFunctionLookupNS(ctxt->context,
@@ -13430,6 +13485,7 @@ xmlXPathCompOpEval(xmlXPathParserContextPtr ctxt, xmlXPathStepOpPtr op)
func(ctxt, op->value);
ctxt->context->function = oldFunc;
ctxt->context->functionURI = oldFuncURI;
+ xmlXPathPopFrame(ctxt, frame);
return (total);
}
case XPATH_OP_ARG:
@@ -14333,6 +14389,7 @@ xmlXPathRunEval(xmlXPathParserContextPtr ctxt, int toBool)
ctxt->valueNr = 0;
ctxt->valueMax = 10;
ctxt->value = NULL;
+ ctxt->valueFrame = 0;
}
#ifdef XPATH_STREAMING
if (ctxt->comp->stream) {
diff --git a/xpointer.c b/xpointer.c
index 7a42d02..37afa3a 100644
--- a/xpointer.c
+++ b/xpointer.c
@@ -1269,6 +1269,7 @@ xmlXPtrEvalXPointer(xmlXPathParserContextPtr ctxt) {
ctxt->valueNr = 0;
ctxt->valueMax = 10;
ctxt->value = NULL;
+ ctxt->valueFrame = 0;
}
SKIP_BLANKS;
if (CUR == '/') {
--
cgit v0.9.0.2

297
package/libxml2/libxml2-2.7.8-hash-randomization.patch Normal file
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@ -0,0 +1,297 @@
From 8973d58b7498fa5100a876815476b81fd1a2412a Mon Sep 17 00:00:00 2001
From: Daniel Veillard <veillard@redhat.com>
Date: Sat, 4 Feb 2012 19:07:44 +0800
Subject: [PATCH] Add hash randomization to hash and dict structures
Following http://www.ocert.org/advisories/ocert-2011-003.html
it seems that having hash randomization might be a good idea
when using XML with untrusted data
* configure.in: lookup for rand, srand and time
* dict.c: add randomization to dictionaries hash tables
* hash.c: add randomization to normal hash tables
---
configure.in | 1 +
dict.c | 81 ++++++++++++++++++++++++++++++++++++++++-----------------
hash.c | 38 ++++++++++++++++++++++++++-
3 files changed, 95 insertions(+), 25 deletions(-)
diff --git a/configure.in b/configure.in
index fa80375..828b66a 100644
--- a/configure.in
+++ b/configure.in
@@ -512,6 +512,7 @@ AC_CHECK_FUNCS(strdup strndup strerror)
AC_CHECK_FUNCS(finite isnand fp_class class fpclass)
AC_CHECK_FUNCS(strftime localtime gettimeofday ftime)
AC_CHECK_FUNCS(stat _stat signal)
+AC_CHECK_FUNCS(rand srand time)
dnl Checking the standard string functions availability
AC_CHECK_FUNCS(printf sprintf fprintf snprintf vfprintf vsprintf vsnprintf sscanf,,
diff --git a/dict.c b/dict.c
index 3eff231..ae4966b 100644
--- a/dict.c
+++ b/dict.c
@@ -2,7 +2,7 @@
* dict.c: dictionary of reusable strings, just used to avoid allocation
* and freeing operations.
*
- * Copyright (C) 2003 Daniel Veillard.
+ * Copyright (C) 2003-2012 Daniel Veillard.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@@ -19,6 +19,28 @@
#define IN_LIBXML
#include "libxml.h"
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_TIME_H
+#include <time.h>
+#endif
+
+/*
+ * Following http://www.ocert.org/advisories/ocert-2011-003.html
+ * it seems that having hash randomization might be a good idea
+ * when using XML with untrusted data
+ * Note1: that it works correctly only if compiled with WITH_BIG_KEY
+ * which is the default.
+ * Note2: the fast function used for a small dict won't protect very
+ * well but since the attack is based on growing a very big hash
+ * list we will use the BigKey algo as soon as the hash size grows
+ * over MIN_DICT_SIZE so this actually works
+ */
+#if defined(HAVE_RAND) && defined(HAVE_SRAND) && defined(HAVE_TIME)
+#define DICT_RANDOMIZATION
+#endif
+
#include <string.h>
#ifdef HAVE_STDINT_H
#include <stdint.h>
@@ -44,23 +66,23 @@ typedef unsigned __int32 uint32_t;
#define WITH_BIG_KEY
#ifdef WITH_BIG_KEY
-#define xmlDictComputeKey(dict, name, len) \
- (((dict)->size == MIN_DICT_SIZE) ? \
- xmlDictComputeFastKey(name, len) : \
- xmlDictComputeBigKey(name, len))
-
-#define xmlDictComputeQKey(dict, prefix, plen, name, len) \
- (((prefix) == NULL) ? \
- (xmlDictComputeKey(dict, name, len)) : \
- (((dict)->size == MIN_DICT_SIZE) ? \
- xmlDictComputeFastQKey(prefix, plen, name, len) : \
- xmlDictComputeBigQKey(prefix, plen, name, len)))
+#define xmlDictComputeKey(dict, name, len) \
+ (((dict)->size == MIN_DICT_SIZE) ? \
+ xmlDictComputeFastKey(name, len, (dict)->seed) : \
+ xmlDictComputeBigKey(name, len, (dict)->seed))
+
+#define xmlDictComputeQKey(dict, prefix, plen, name, len) \
+ (((prefix) == NULL) ? \
+ (xmlDictComputeKey(dict, name, len)) : \
+ (((dict)->size == MIN_DICT_SIZE) ? \
+ xmlDictComputeFastQKey(prefix, plen, name, len, (dict)->seed) : \
+ xmlDictComputeBigQKey(prefix, plen, name, len, (dict)->seed)))
#else /* !WITH_BIG_KEY */
-#define xmlDictComputeKey(dict, name, len) \
- xmlDictComputeFastKey(name, len)
-#define xmlDictComputeQKey(dict, prefix, plen, name, len) \
- xmlDictComputeFastQKey(prefix, plen, name, len)
+#define xmlDictComputeKey(dict, name, len) \
+ xmlDictComputeFastKey(name, len, (dict)->seed)
+#define xmlDictComputeQKey(dict, prefix, plen, name, len) \
+ xmlDictComputeFastQKey(prefix, plen, name, len, (dict)->seed)
#endif /* WITH_BIG_KEY */
/*
@@ -98,6 +120,8 @@ struct _xmlDict {
xmlDictStringsPtr strings;
struct _xmlDict *subdict;
+ /* used for randomization */
+ int seed;
};
/*
@@ -125,6 +149,9 @@ static int xmlInitializeDict(void) {
if ((xmlDictMutex = xmlNewRMutex()) == NULL)
return(0);
+#ifdef DICT_RANDOMIZATION
+ srand(time(NULL));
+#endif
xmlDictInitialized = 1;
return(1);
}
@@ -277,13 +304,13 @@ found_pool:
*/
static uint32_t
-xmlDictComputeBigKey(const xmlChar* data, int namelen) {
+xmlDictComputeBigKey(const xmlChar* data, int namelen, int seed) {
uint32_t hash;
int i;
if (namelen <= 0 || data == NULL) return(0);
- hash = 0;
+ hash = seed;
for (i = 0;i < namelen; i++) {
hash += data[i];
@@ -310,12 +337,12 @@ xmlDictComputeBigKey(const xmlChar* data, int namelen) {
*/
static unsigned long
xmlDictComputeBigQKey(const xmlChar *prefix, int plen,
- const xmlChar *name, int len)
+ const xmlChar *name, int len, int seed)
{
uint32_t hash;
int i;
- hash = 0;
+ hash = seed;
for (i = 0;i < plen; i++) {
hash += prefix[i];
@@ -346,8 +373,8 @@ xmlDictComputeBigQKey(const xmlChar *prefix, int plen,
* for low hash table fill.
*/
static unsigned long
-xmlDictComputeFastKey(const xmlChar *name, int namelen) {
- unsigned long value = 0L;
+xmlDictComputeFastKey(const xmlChar *name, int namelen, int seed) {
+ unsigned long value = seed;
if (name == NULL) return(0);
value = *name;
@@ -381,9 +408,9 @@ xmlDictComputeFastKey(const xmlChar *name, int namelen) {
*/
static unsigned long
xmlDictComputeFastQKey(const xmlChar *prefix, int plen,
- const xmlChar *name, int len)
+ const xmlChar *name, int len, int seed)
{
- unsigned long value = 0L;
+ unsigned long value = (unsigned long) seed;
if (plen == 0)
value += 30 * (unsigned long) ':';
@@ -460,6 +487,11 @@ xmlDictCreate(void) {
dict->subdict = NULL;
if (dict->dict) {
memset(dict->dict, 0, MIN_DICT_SIZE * sizeof(xmlDictEntry));
+#ifdef DICT_RANDOMIZATION
+ dict->seed = rand();
+#else
+ dict->seed = 0;
+#endif
return(dict);
}
xmlFree(dict);
@@ -486,6 +518,7 @@ xmlDictCreateSub(xmlDictPtr sub) {
#ifdef DICT_DEBUG_PATTERNS
fprintf(stderr, "R");
#endif
+ dict->seed = sub->seed;
dict->subdict = sub;
xmlDictReference(dict->subdict);
}
diff --git a/hash.c b/hash.c
index b78bc2d..fe1424f 100644
--- a/hash.c
+++ b/hash.c
@@ -3,7 +3,7 @@
*
* Reference: Your favorite introductory book on algorithms
*
- * Copyright (C) 2000 Bjorn Reese and Daniel Veillard.
+ * Copyright (C) 2000,2012 Bjorn Reese and Daniel Veillard.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@@ -21,6 +21,22 @@
#include "libxml.h"
#include <string.h>
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_TIME_H
+#include <time.h>
+#endif
+
+/*
+ * Following http://www.ocert.org/advisories/ocert-2011-003.html
+ * it seems that having hash randomization might be a good idea
+ * when using XML with untrusted data
+ */
+#if defined(HAVE_RAND) && defined(HAVE_SRAND) && defined(HAVE_TIME)
+#define HASH_RANDOMIZATION
+#endif
+
#include <libxml/parser.h>
#include <libxml/hash.h>
#include <libxml/xmlmemory.h>
@@ -31,6 +47,10 @@
/* #define DEBUG_GROW */
+#ifdef HASH_RANDOMIZATION
+static int hash_initialized = 0;
+#endif
+
/*
* A single entry in the hash table
*/
@@ -53,6 +73,9 @@ struct _xmlHashTable {
int size;
int nbElems;
xmlDictPtr dict;
+#ifdef HASH_RANDOMIZATION
+ int random_seed;
+#endif
};
/*
@@ -65,6 +88,9 @@ xmlHashComputeKey(xmlHashTablePtr table, const xmlChar *name,
unsigned long value = 0L;
char ch;
+#ifdef HASH_RANDOMIZATION
+ value = table->random_seed;
+#endif
if (name != NULL) {
value += 30 * (*name);
while ((ch = *name++) != 0) {
@@ -92,6 +118,9 @@ xmlHashComputeQKey(xmlHashTablePtr table,
unsigned long value = 0L;
char ch;
+#ifdef HASH_RANDOMIZATION
+ value = table->random_seed;
+#endif
if (prefix != NULL)
value += 30 * (*prefix);
else
@@ -156,6 +185,13 @@ xmlHashCreate(int size) {
table->table = xmlMalloc(size * sizeof(xmlHashEntry));
if (table->table) {
memset(table->table, 0, size * sizeof(xmlHashEntry));
+#ifdef HASH_RANDOMIZATION
+ if (!hash_initialized) {
+ srand(time(NULL));
+ hash_initialized = 1;
+ }
+ table->random_seed = rand();
+#endif
return(table);
}
xmlFree(table);
--
1.7.8.4

101
package/libxml2/libxml2-2.7.8-reallocation-failures.patch Normal file
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@ -0,0 +1,101 @@
From d7958b21e7f8c447a26bb2436f08402b2c308be4 Mon Sep 17 00:00:00 2001
From: Chris Evans <scarybeasts@gmail.com>
Date: Wed, 23 Mar 2011 00:13:06 +0000
Subject: Fix some potential problems on reallocation failures
The count was incremented before the allocation
and not fixed in case of failure
* xpath.c: corrects a few instances where the available count of some
structure is updated before we know the allocation actually
succeeds
---
diff --git a/xpath.c b/xpath.c
index 8b56189..608fe00 100644
--- a/xpath.c
+++ b/xpath.c
@@ -3522,13 +3522,13 @@ xmlXPathNodeSetAddNs(xmlNodeSetPtr cur, xmlNodePtr node, xmlNsPtr ns) {
} else if (cur->nodeNr == cur->nodeMax) {
xmlNodePtr *temp;
- cur->nodeMax *= 2;
- temp = (xmlNodePtr *) xmlRealloc(cur->nodeTab, cur->nodeMax *
+ temp = (xmlNodePtr *) xmlRealloc(cur->nodeTab, cur->nodeMax * 2 *
sizeof(xmlNodePtr));
if (temp == NULL) {
xmlXPathErrMemory(NULL, "growing nodeset\n");
return;
}
+ cur->nodeMax *= 2;
cur->nodeTab = temp;
}
cur->nodeTab[cur->nodeNr++] = xmlXPathNodeSetDupNs(node, ns);
@@ -3627,14 +3627,14 @@ xmlXPathNodeSetAddUnique(xmlNodeSetPtr cur, xmlNodePtr val) {
} else if (cur->nodeNr == cur->nodeMax) {
xmlNodePtr *temp;
- cur->nodeMax *= 2;
- temp = (xmlNodePtr *) xmlRealloc(cur->nodeTab, cur->nodeMax *
+ temp = (xmlNodePtr *) xmlRealloc(cur->nodeTab, cur->nodeMax * 2 *
sizeof(xmlNodePtr));
if (temp == NULL) {
xmlXPathErrMemory(NULL, "growing nodeset\n");
return;
}
cur->nodeTab = temp;
+ cur->nodeMax *= 2;
}
if (val->type == XML_NAMESPACE_DECL) {
xmlNsPtr ns = (xmlNsPtr) val;
@@ -3738,14 +3738,14 @@ xmlXPathNodeSetMerge(xmlNodeSetPtr val1, xmlNodeSetPtr val2) {
} else if (val1->nodeNr == val1->nodeMax) {
xmlNodePtr *temp;
- val1->nodeMax *= 2;
- temp = (xmlNodePtr *) xmlRealloc(val1->nodeTab, val1->nodeMax *
+ temp = (xmlNodePtr *) xmlRealloc(val1->nodeTab, val1->nodeMax * 2 *
sizeof(xmlNodePtr));
if (temp == NULL) {
xmlXPathErrMemory(NULL, "merging nodeset\n");
return(NULL);
}
val1->nodeTab = temp;
+ val1->nodeMax *= 2;
}
if (n2->type == XML_NAMESPACE_DECL) {
xmlNsPtr ns = (xmlNsPtr) n2;
@@ -3907,14 +3907,14 @@ xmlXPathNodeSetMergeAndClear(xmlNodeSetPtr set1, xmlNodeSetPtr set2,
} else if (set1->nodeNr >= set1->nodeMax) {
xmlNodePtr *temp;
- set1->nodeMax *= 2;
temp = (xmlNodePtr *) xmlRealloc(
- set1->nodeTab, set1->nodeMax * sizeof(xmlNodePtr));
+ set1->nodeTab, set1->nodeMax * 2 * sizeof(xmlNodePtr));
if (temp == NULL) {
xmlXPathErrMemory(NULL, "merging nodeset\n");
return(NULL);
}
set1->nodeTab = temp;
+ set1->nodeMax *= 2;
}
if (n2->type == XML_NAMESPACE_DECL) {
xmlNsPtr ns = (xmlNsPtr) n2;
@@ -3991,14 +3991,14 @@ xmlXPathNodeSetMergeAndClearNoDupls(xmlNodeSetPtr set1, xmlNodeSetPtr set2,
} else if (set1->nodeNr >= set1->nodeMax) {
xmlNodePtr *temp;
- set1->nodeMax *= 2;
temp = (xmlNodePtr *) xmlRealloc(
- set1->nodeTab, set1->nodeMax * sizeof(xmlNodePtr));
+ set1->nodeTab, set1->nodeMax * 2 * sizeof(xmlNodePtr));
if (temp == NULL) {
xmlXPathErrMemory(NULL, "merging nodeset\n");
return(NULL);
}
set1->nodeTab = temp;
+ set1->nodeMax *= 2;
}
set1->nodeTab[set1->nodeNr++] = n2;
}
--
cgit v0.9

32
package/libxml2/libxml2-2.7.8-xpath-freeing.patch Normal file
View File

@ -0,0 +1,32 @@
From df83c17e5a2646bd923f75e5e507bc80d73c9722 Mon Sep 17 00:00:00 2001
From: Daniel Veillard <veillard@redhat.com>
Date: Wed, 17 Nov 2010 13:12:14 +0000
Subject: Fix a potential freeing error in XPath
---
diff --git a/xpath.c b/xpath.c
index 81e33f6..1447be5 100644
--- a/xpath.c
+++ b/xpath.c
@@ -11763,11 +11763,15 @@ xmlXPathCompOpEvalPositionalPredicate(xmlXPathParserContextPtr ctxt,
if ((ctxt->error != XPATH_EXPRESSION_OK) || (res == -1)) {
xmlXPathObjectPtr tmp;
- /* pop the result */
+ /* pop the result if any */
tmp = valuePop(ctxt);
- xmlXPathReleaseObject(xpctxt, tmp);
- /* then pop off contextObj, which will be freed later */
- valuePop(ctxt);
+ if (tmp != contextObj)
+ /*
+ * Free up the result
+ * then pop off contextObj, which will be freed later
+ */
+ xmlXPathReleaseObject(xpctxt, tmp);
+ valuePop(ctxt);
goto evaluation_error;
}
--
cgit v0.8.3.1

28
package/libxml2/libxml2-2.7.8-xpath-freeing2.patch Normal file
View File

@ -0,0 +1,28 @@
From fec31bcd452e77c10579467ca87a785b41115de6 Mon Sep 17 00:00:00 2001
From: Daniel Veillard <veillard@redhat.com>
Date: Thu, 18 Nov 2010 10:07:24 +0000
Subject: Small fix for previous commit
---
diff --git a/xpath.c b/xpath.c
index 1447be5..8b56189 100644
--- a/xpath.c
+++ b/xpath.c
@@ -11765,13 +11765,14 @@ xmlXPathCompOpEvalPositionalPredicate(xmlXPathParserContextPtr ctxt,
xmlXPathObjectPtr tmp;
/* pop the result if any */
tmp = valuePop(ctxt);
- if (tmp != contextObj)
+ if (tmp != contextObj) {
/*
* Free up the result
* then pop off contextObj, which will be freed later
*/
xmlXPathReleaseObject(xpctxt, tmp);
valuePop(ctxt);
+ }
goto evaluation_error;
}
--
cgit v0.8.3.1

29
package/libxml2/libxml2-2.7.8-xpath-memory.patch Normal file
View File

@ -0,0 +1,29 @@
From 0cbeb50ee03ce582a0c979c70d8fbf030e270c37 Mon Sep 17 00:00:00 2001
From: Daniel Veillard <veillard@redhat.com>
Date: Mon, 15 Nov 2010 11:06:29 +0000
Subject: Fix a potential memory access error
in case of a previus allocation error
---
diff --git a/xpath.c b/xpath.c
index 4d6826d..81e33f6 100644
--- a/xpath.c
+++ b/xpath.c
@@ -3575,13 +3575,13 @@ xmlXPathNodeSetAdd(xmlNodeSetPtr cur, xmlNodePtr val) {
} else if (cur->nodeNr == cur->nodeMax) {
xmlNodePtr *temp;
- cur->nodeMax *= 2;
- temp = (xmlNodePtr *) xmlRealloc(cur->nodeTab, cur->nodeMax *
+ temp = (xmlNodePtr *) xmlRealloc(cur->nodeTab, cur->nodeMax * 2 *
sizeof(xmlNodePtr));
if (temp == NULL) {
xmlXPathErrMemory(NULL, "growing nodeset\n");
return;
}
+ cur->nodeMax *= 2;
cur->nodeTab = temp;
}
if (val->type == XML_NAMESPACE_DECL) {
--
cgit v0.8.3.1

1
package/libxml2/libxml2.mk
View File

@ -7,6 +7,7 @@
LIBXML2_VERSION = 2.7.8
LIBXML2_SITE = ftp://xmlsoft.org/libxml2
LIBXML2_INSTALL_STAGING = YES
LIBXML2_AUTORECONF = YES
ifneq ($(BR2_LARGEFILE),y)
LIBXML2_CONF_ENV = CC="$(TARGET_CC) $(TARGET_CFLAGS) -DNO_LARGEFILE_SOURCE"