upgrade to expat 2.4.4

Change-Id: Ie141268793dc4332d8c253bec4e986894682c7a6
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/129179
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>

3 files changed, 0 insertions, 188 deletions

diff --git a/external/expat/CVE-2022-23852.patch b/external/expat/CVE-2022-23852.patch
deleted file mode 100644
index c2b55ca854ef..000000000000
--- a/external/expat/CVE-2022-23852.patch
+++ /dev/null
@@ -1,115 +0,0 @@
-From 847a645152f5ebc10ac63b74b604d0c1a79fae40 Mon Sep 17 00:00:00 2001
-From: Samanta Navarro <ferivoz@riseup.net>
-Date: Sat, 22 Jan 2022 17:48:00 +0100
-Subject: [PATCH 1/3] lib: Detect and prevent integer overflow in XML_GetBuffer
- (CVE-2022-23852)
-
----
- expat/lib/xmlparse.c | 5 +++++
- 1 file changed, 5 insertions(+)
-
-diff --git a/expat/lib/xmlparse.c b/expat/lib/xmlparse.c
-index d54af683..5ce31402 100644
---- a/expat/lib/xmlparse.c
-+++ b/expat/lib/xmlparse.c
-@@ -2067,6 +2067,11 @@ XML_GetBuffer(XML_Parser parser, int len) {
-     keep = (int)EXPAT_SAFE_PTR_DIFF(parser->m_bufferPtr, parser->m_buffer);
-     if (keep > XML_CONTEXT_BYTES)
-       keep = XML_CONTEXT_BYTES;
-+    /* Detect and prevent integer overflow */
-+    if (keep > INT_MAX - neededSize) {
-+      parser->m_errorCode = XML_ERROR_NO_MEMORY;
-+      return NULL;
-+    }
-     neededSize += keep;
- #endif /* defined XML_CONTEXT_BYTES */
-     if (neededSize
-
-From acf956f14bf79a5e6383a969aaffec98bfbc2e44 Mon Sep 17 00:00:00 2001
-From: Sebastian Pipping <sebastian@pipping.org>
-Date: Sun, 23 Jan 2022 18:17:04 +0100
-Subject: [PATCH 2/3] tests: Cover integer overflow in XML_GetBuffer
- (CVE-2022-23852)
-
----
- expat/tests/runtests.c | 27 +++++++++++++++++++++++++++
- 1 file changed, 27 insertions(+)
-
-diff --git a/expat/tests/runtests.c b/expat/tests/runtests.c
-index e89e8220..579dad1a 100644
---- a/expat/tests/runtests.c
-+++ b/expat/tests/runtests.c
-@@ -3847,6 +3847,30 @@ START_TEST(test_get_buffer_2) {
- }
- END_TEST
- 
-+/* Test for signed integer overflow CVE-2022-23852 */
-+#if defined(XML_CONTEXT_BYTES)
-+START_TEST(test_get_buffer_3_overflow) {
-+  XML_Parser parser = XML_ParserCreate(NULL);
-+  assert(parser != NULL);
-+
-+  const char *const text = "\n";
-+  const int expectedKeepValue = (int)strlen(text);
-+
-+  // After this call, variable "keep" in XML_GetBuffer will
-+  // have value expectedKeepValue
-+  if (XML_Parse(parser, text, (int)strlen(text), XML_FALSE /* isFinal */)
-+      == XML_STATUS_ERROR)
-+    xml_failure(parser);
-+
-+  assert(expectedKeepValue > 0);
-+  if (XML_GetBuffer(parser, INT_MAX - expectedKeepValue + 1) != NULL)
-+    fail("enlarging buffer not failed");
-+
-+  XML_ParserFree(parser);
-+}
-+END_TEST
-+#endif // defined(XML_CONTEXT_BYTES)
-+
- /* Test position information macros */
- START_TEST(test_byte_info_at_end) {
-   const char *text = "<doc></doc>";
-@@ -11731,6 +11755,9 @@ make_suite(void) {
-   tcase_add_test(tc_basic, test_empty_parse);
-   tcase_add_test(tc_basic, test_get_buffer_1);
-   tcase_add_test(tc_basic, test_get_buffer_2);
-+#if defined(XML_CONTEXT_BYTES)
-+  tcase_add_test(tc_basic, test_get_buffer_3_overflow);
-+#endif
-   tcase_add_test(tc_basic, test_byte_info_at_end);
-   tcase_add_test(tc_basic, test_byte_info_at_error);
-   tcase_add_test(tc_basic, test_byte_info_at_cdata);
-
-From 99cec436fbd9444f57ee74ca8ae4c0a13e561a4f Mon Sep 17 00:00:00 2001
-From: Sebastian Pipping <sebastian@pipping.org>
-Date: Sat, 22 Jan 2022 17:49:17 +0100
-Subject: [PATCH 3/3] Changes: Document CVE-2022-23852
-
----
- expat/Changes | 12 ++++++++++++
- 1 file changed, 12 insertions(+)
-
-diff --git a/expat/Changes b/expat/Changes
-index 7540d38c..64d75d05 100644
---- a/expat/Changes
-+++ b/expat/Changes
-@@ -2,6 +2,18 @@ NOTE: We are looking for help with a few things:
-       https://github.com/libexpat/libexpat/labels/help%20wanted
-       If you can help, please get in touch.  Thanks!
- 
-+Release x.x.x xxx xxxxxxx xx xxxx
-+        Security fixes:
-+            #550  CVE-2022-23852 -- Fix signed integer overflow
-+                    (undefined behavior) in function XML_GetBuffer
-+                    (that is also called by function XML_Parse internally)
-+                    for when XML_CONTEXT_BYTES is defined to >0 (which is both
-+                    common and default).
-+                    Impact is denial of service or more.
-+
-+        Special thanks to:
-+            Samanta Navarro
-+
- Release 2.4.3 Sun January 16 2022
-         Security fixes:
-        #531 #534  CVE-2021-45960 -- Fix issues with left shifts by >=29 places
diff --git a/external/expat/CVE-2022-23990.patch b/external/expat/CVE-2022-23990.patch
deleted file mode 100644
index df46631d7f35..000000000000
--- a/external/expat/CVE-2022-23990.patch
+++ /dev/null
@@ -1,71 +0,0 @@
-From ede41d1e186ed2aba88a06e84cac839b770af3a1 Mon Sep 17 00:00:00 2001
-From: Sebastian Pipping <sebastian@pipping.org>
-Date: Wed, 26 Jan 2022 02:36:43 +0100
-Subject: [PATCH 1/2] lib: Prevent integer overflow in doProlog
- (CVE-2022-23990)
-
-The change from "int nameLen" to "size_t nameLen"
-addresses the overflow on "nameLen++" in code
-"for (; name[nameLen++];)" right above the second
-change in the patch.
----
- expat/lib/xmlparse.c | 10 ++++++++--
- 1 file changed, 8 insertions(+), 2 deletions(-)
-
-diff --git a/expat/lib/xmlparse.c b/expat/lib/xmlparse.c
-index 5ce31402..d1d17005 100644
---- a/expat/lib/xmlparse.c
-+++ b/expat/lib/xmlparse.c
-@@ -5372,7 +5372,7 @@ doProlog(XML_Parser parser, const ENCODING *enc, const char *s, const char *end,
-       if (dtd->in_eldecl) {
-         ELEMENT_TYPE *el;
-         const XML_Char *name;
--        int nameLen;
-+        size_t nameLen;
-         const char *nxt
-             = (quant == XML_CQUANT_NONE ? next : next - enc->minBytesPerChar);
-         int myindex = nextScaffoldPart(parser);
-@@ -5388,7 +5388,13 @@ doProlog(XML_Parser parser, const ENCODING *enc, const char *s, const char *end,
-         nameLen = 0;
-         for (; name[nameLen++];)
-           ;
--        dtd->contentStringLen += nameLen;
-+
-+        /* Detect and prevent integer overflow */
-+        if (nameLen > UINT_MAX - dtd->contentStringLen) {
-+          return XML_ERROR_NO_MEMORY;
-+        }
-+
-+        dtd->contentStringLen += (unsigned)nameLen;
-         if (parser->m_elementDeclHandler)
-           handleDefault = XML_FALSE;
-       }
-
-From 6e3449594fb2f61c92fc561f51f82196fdd15d63 Mon Sep 17 00:00:00 2001
-From: Sebastian Pipping <sebastian@pipping.org>
-Date: Wed, 26 Jan 2022 02:51:39 +0100
-Subject: [PATCH 2/2] Changes: Document CVE-2022-23990
-
----
- expat/Changes | 6 ++++++
- 1 file changed, 6 insertions(+)
-
-diff --git a/expat/Changes b/expat/Changes
-index 5ff5da5e..ec1f7604 100644
---- a/expat/Changes
-+++ b/expat/Changes
-@@ -10,8 +10,14 @@
-                     for when XML_CONTEXT_BYTES is defined to >0 (which is both
-                     common and default).
-                     Impact is denial of service or more.
-+            #551  CVE-2022-23990 -- Fix unsigned integer overflow in function
-+                    doProlog triggered by large content in element type
-+                    declarations when there is an element declaration handler
-+                    present (from a prior call to XML_SetElementDeclHandler).
-+                    Impact is denial of service or more.
- 
-         Special thanks to:
-+            Roland Illig
-             Samanta Navarro
- 
- Release 2.4.3 Sun January 16 2022
diff --git a/external/expat/UnpackedTarball_expat.mk b/external/expat/UnpackedTarball_expat.mk
index 8cb6ef9b95eb..5d4f41f6d147 100644
--- a/external/expat/UnpackedTarball_expat.mk
+++ b/external/expat/UnpackedTarball_expat.mk
@@ -15,8 +15,6 @@ $(eval $(call gb_UnpackedTarball_update_autoconf_configs,expat,conftools))
 
 $(eval $(call gb_UnpackedTarball_add_patches,expat,\
 	external/expat/expat-winapi.patch \
-	external/expat/CVE-2022-23852.patch \
-	external/expat/CVE-2022-23990.patch \
 ))
 
 # This is a bit hackish.