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[3.10] gh-116741: Upgrade libexpat to 2.6.2 (GH-117296) #118186

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May 7, 2024
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[3.10] gh-116741: Upgrade libexpat to 2.6.2 (GH-117296) #118186

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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Security/2024-03-27-13-50-02.gh-issue-116741.ZoGryG.rst
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@@ -0,0 +1 @@
Update bundled libexpat to 2.6.2
5 changes: 3 additions & 2 deletions Modules/expat/expat.h
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Expand Up @@ -18,6 +18,7 @@
Copyright (c) 2022 Thijs Schreijer <[email protected]>
Copyright (c) 2023 Hanno Böck <[email protected]>
Copyright (c) 2023 Sony Corporation / Snild Dolkow <[email protected]>
Copyright (c) 2024 Taichi Haradaguchi <[email protected]>
Licensed under the MIT license:

Permission is hereby granted, free of charge, to any person obtaining
Expand Down Expand Up @@ -1042,7 +1043,7 @@ typedef struct {
XMLPARSEAPI(const XML_Feature *)
XML_GetFeatureList(void);

#if XML_GE == 1
#if defined(XML_DTD) || (defined(XML_GE) && XML_GE == 1)
/* Added in Expat 2.4.0 for XML_DTD defined and
* added in Expat 2.6.0 for XML_GE == 1. */
XMLPARSEAPI(XML_Bool)
Expand All @@ -1065,7 +1066,7 @@ XML_SetReparseDeferralEnabled(XML_Parser parser, XML_Bool enabled);
*/
#define XML_MAJOR_VERSION 2
#define XML_MINOR_VERSION 6
#define XML_MICRO_VERSION 0
#define XML_MICRO_VERSION 2

#ifdef __cplusplus
}
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17 changes: 12 additions & 5 deletions Modules/expat/internal.h
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Expand Up @@ -28,10 +28,11 @@
Copyright (c) 2002-2003 Fred L. Drake, Jr. <[email protected]>
Copyright (c) 2002-2006 Karl Waclawek <[email protected]>
Copyright (c) 2003 Greg Stein <[email protected]>
Copyright (c) 2016-2023 Sebastian Pipping <[email protected]>
Copyright (c) 2016-2024 Sebastian Pipping <[email protected]>
Copyright (c) 2018 Yury Gribov <[email protected]>
Copyright (c) 2019 David Loffredo <[email protected]>
Copyright (c) 2023 Sony Corporation / Snild Dolkow <[email protected]>
Copyright (c) 2023-2024 Sony Corporation / Snild Dolkow <[email protected]>
Copyright (c) 2024 Taichi Haradaguchi <[email protected]>
Licensed under the MIT license:

Permission is hereby granted, free of charge, to any person obtaining
Expand Down Expand Up @@ -155,14 +156,20 @@ extern "C" {
void _INTERNAL_trim_to_complete_utf8_characters(const char *from,
const char **fromLimRef);

#if XML_GE == 1
#if defined(XML_GE) && XML_GE == 1
unsigned long long testingAccountingGetCountBytesDirect(XML_Parser parser);
unsigned long long testingAccountingGetCountBytesIndirect(XML_Parser parser);
const char *unsignedCharToPrintable(unsigned char c);
#endif

extern XML_Bool g_reparseDeferralEnabledDefault; // written ONLY in runtests.c
extern unsigned int g_parseAttempts; // used for testing only
extern
#if ! defined(XML_TESTING)
const
#endif
XML_Bool g_reparseDeferralEnabledDefault; // written ONLY in runtests.c
#if defined(XML_TESTING)
extern unsigned int g_bytesScanned; // used for testing only
#endif

#ifdef __cplusplus
}
Expand Down
30 changes: 21 additions & 9 deletions Modules/expat/xmlparse.c
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@@ -1,4 +1,4 @@
/* 628e24d4966bedbd4800f6ed128d06d29703765b4bce12d3b7f099f90f842fc9 (2.6.0+)
/* 2a14271ad4d35e82bde8ba210b4edb7998794bcbae54deab114046a300f9639a (2.6.2+)
__ __ _
___\ \/ /_ __ __ _| |_
/ _ \\ /| '_ \ / _` | __|
Expand Down Expand Up @@ -38,7 +38,7 @@
Copyright (c) 2022 Jann Horn <[email protected]>
Copyright (c) 2022 Sean McBride <[email protected]>
Copyright (c) 2023 Owain Davies <[email protected]>
Copyright (c) 2023 Sony Corporation / Snild Dolkow <[email protected]>
Copyright (c) 2023-2024 Sony Corporation / Snild Dolkow <[email protected]>
Licensed under the MIT license:

Permission is hereby granted, free of charge, to any person obtaining
Expand Down Expand Up @@ -210,7 +210,7 @@ typedef char ICHAR;
#endif

/* Round up n to be a multiple of sz, where sz is a power of 2. */
#define ROUND_UP(n, sz) (((n) + ((sz)-1)) & ~((sz)-1))
#define ROUND_UP(n, sz) (((n) + ((sz) - 1)) & ~((sz) - 1))

/* Do safe (NULL-aware) pointer arithmetic */
#define EXPAT_SAFE_PTR_DIFF(p, q) (((p) && (q)) ? ((p) - (q)) : 0)
Expand Down Expand Up @@ -248,7 +248,7 @@ static void copy_salt_to_sipkey(XML_Parser parser, struct sipkey *key);
it odd, since odd numbers are always relative prime to a power of 2.
*/
#define SECOND_HASH(hash, mask, power) \
((((hash) & ~(mask)) >> ((power)-1)) & ((mask) >> 2))
((((hash) & ~(mask)) >> ((power) - 1)) & ((mask) >> 2))
#define PROBE_STEP(hash, mask, power) \
((unsigned char)((SECOND_HASH(hash, mask, power)) | 1))

Expand Down Expand Up @@ -629,8 +629,14 @@ static unsigned long getDebugLevel(const char *variableName,
? 0 \
: ((*((pool)->ptr)++ = c), 1))

XML_Bool g_reparseDeferralEnabledDefault = XML_TRUE; // write ONLY in runtests.c
unsigned int g_parseAttempts = 0; // used for testing only
#if ! defined(XML_TESTING)
const
#endif
XML_Bool g_reparseDeferralEnabledDefault
= XML_TRUE; // write ONLY in runtests.c
#if defined(XML_TESTING)
unsigned int g_bytesScanned = 0; // used for testing only
#endif

struct XML_ParserStruct {
/* The first member must be m_userData so that the XML_GetUserData
Expand Down Expand Up @@ -1017,7 +1023,9 @@ callProcessor(XML_Parser parser, const char *start, const char *end,
return XML_ERROR_NONE;
}
}
g_parseAttempts += 1;
#if defined(XML_TESTING)
g_bytesScanned += (unsigned)have_now;
#endif
const enum XML_Error ret = parser->m_processor(parser, start, end, endPtr);
if (ret == XML_ERROR_NONE) {
// if we consumed nothing, remember what we had on this parse attempt.
Expand Down Expand Up @@ -6232,7 +6240,7 @@ storeEntityValue(XML_Parser parser, const ENCODING *enc,
dtd->keepProcessing = dtd->standalone;
goto endEntityValue;
}
if (entity->open) {
if (entity->open || (entity == parser->m_declEntity)) {
if (enc == parser->m_encoding)
parser->m_eventPtr = entityTextPtr;
result = XML_ERROR_RECURSIVE_ENTITY_REF;
Expand Down Expand Up @@ -7779,14 +7787,18 @@ copyString(const XML_Char *s, const XML_Memory_Handling_Suite *memsuite) {

static float
accountingGetCurrentAmplification(XML_Parser rootParser) {
// 1.........1.........12 => 22
const size_t lenOfShortestInclude = sizeof("<!ENTITY a SYSTEM 'b'>") - 1;
const XmlBigCount countBytesOutput
= rootParser->m_accounting.countBytesDirect
+ rootParser->m_accounting.countBytesIndirect;
const float amplificationFactor
= rootParser->m_accounting.countBytesDirect
? (countBytesOutput
/ (float)(rootParser->m_accounting.countBytesDirect))
: 1.0f;
: ((lenOfShortestInclude
+ rootParser->m_accounting.countBytesIndirect)
/ (float)lenOfShortestInclude);
assert(! rootParser->m_parentParser);
return amplificationFactor;
}
Expand Down
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