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authorBrett Cannon <bcannon@gmail.com>2009-08-13 19:45:44 (GMT)
committerBrett Cannon <bcannon@gmail.com>2009-08-13 19:45:44 (GMT)
commit559eb088618c9ac1423165b6e7205edbeffeca68 (patch)
tree4cc30c8a44cf711512b2efbc8736f61c75bff726
parent9440a4a22c53d79342d1717a0fb5f586fc9baf2b (diff)
downloadcpython-559eb088618c9ac1423165b6e7205edbeffeca68.zip
cpython-559eb088618c9ac1423165b6e7205edbeffeca68.tar.gz
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Backport of r74429. Not merged/blocked as svnmerge.py is giving me an error and
I don't want to accidentally check in busted svnmerge metadata.
-rw-r--r--Lib/test/test_pyexpat.py21
-rw-r--r--Misc/ACKS3
-rw-r--r--Misc/NEWS2
-rw-r--r--Modules/expat/xmltok_impl.c2
4 files changed, 25 insertions, 3 deletions
diff --git a/Lib/test/test_pyexpat.py b/Lib/test/test_pyexpat.py
index de5cded..649d5d2 100644
--- a/Lib/test/test_pyexpat.py
+++ b/Lib/test/test_pyexpat.py
@@ -559,6 +559,24 @@ class ChardataBufferTest(unittest.TestCase):
parser.Parse(xml2, 1)
self.assertEquals(self.n, 4)
+class MalformedInputText(unittest.TestCase):
+ def test1(self):
+ xml = "\0\r\n"
+ parser = expat.ParserCreate()
+ try:
+ parser.Parse(xml, True)
+ self.fail()
+ except expat.ExpatError as e:
+ self.assertEquals(str(e), 'no element found: line 2, column 1')
+
+ def test2(self):
+ xml = "<?xml version\xc2\x85='1.0'?>\r\n"
+ parser = expat.ParserCreate()
+ try:
+ parser.Parse(xml, True)
+ self.fail()
+ except expat.ExpatError as e:
+ self.assertEquals(str(e), 'XML declaration not well-formed: line 1, column 14')
def test_main():
run_unittest(SetAttributeTest,
@@ -569,7 +587,8 @@ def test_main():
HandlerExceptionTest,
PositionTest,
sf1296433Test,
- ChardataBufferTest)
+ ChardataBufferTest,
+ MalformedInputText)
if __name__ == "__main__":
test_main()
diff --git a/Misc/ACKS b/Misc/ACKS
index b5794a8..58ce228 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -177,6 +177,7 @@ Ismail Donmez
Dima Dorfman
Cesar Douady
Dean Draayer
+Fred L. Drake, Jr.
John DuBois
Paul Dubois
Graham Dumpleton
@@ -358,7 +359,6 @@ Irmen de Jong
Lucas de Jonge
John Jorgensen
Jens B. Jorgensen
-Fred L. Drake, Jr.
Andreas Jung
Tattoo Mabonzo K.
Bob Kahn
@@ -393,6 +393,7 @@ Holger Krekel
Michael Kremer
Fabian Kreutz
Hannu Krosing
+Ivan Krstić
Andrew Kuchling
Vladimir Kushnir
Cameron Laird
diff --git a/Misc/NEWS b/Misc/NEWS
index a4b3073..20692a0 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -163,6 +163,8 @@ Library
Extension Modules
-----------------
+- Fix expat to not segfault with specially crafted input.
+
- Issue #4873: Fix resource leaks in error cases of pwd and grp.
Build
diff --git a/Modules/expat/xmltok_impl.c b/Modules/expat/xmltok_impl.c
index 0ee57ab..f793a6b 100644
--- a/Modules/expat/xmltok_impl.c
+++ b/Modules/expat/xmltok_impl.c
@@ -1741,7 +1741,7 @@ PREFIX(updatePosition)(const ENCODING *enc,
const char *end,
POSITION *pos)
{
- while (ptr != end) {
+ while (ptr < end) {
switch (BYTE_TYPE(enc, ptr)) {
#define LEAD_CASE(n) \
case BT_LEAD ## n: \