[Python-checkins] cpython (merge 3.3 -> default): Issue #18025: Fixed a segfault in io.BufferedIOBase.readinto() when raw
serhiy.storchaka
python-checkins at python.org
Tue May 28 15:28:15 CEST 2013
http://hg.python.org/cpython/rev/ad56dff3602f
changeset: 83956:ad56dff3602f
parent: 83954:96e543ba96a4
parent: 83955:b864f4056b78
user: Serhiy Storchaka <storchaka at gmail.com>
date: Tue May 28 16:27:08 2013 +0300
summary:
Issue #18025: Fixed a segfault in io.BufferedIOBase.readinto() when raw
stream's read() returns more bytes than requested.
files:
Lib/test/test_io.py | 9 +++++++++
Misc/NEWS | 3 +++
Modules/_io/bufferedio.c | 8 ++++++++
3 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -3027,6 +3027,15 @@
class CMiscIOTest(MiscIOTest):
io = io
+ def test_readinto_buffer_overflow(self):
+ # Issue #18025
+ class BadReader(self.io.BufferedIOBase):
+ def read(self, n=-1):
+ return b'x' * 10**6
+ bufio = BadReader()
+ b = bytearray(2)
+ self.assertRaises(ValueError, bufio.readinto, b)
+
class PyMiscIOTest(MiscIOTest):
io = pyio
diff --git a/Misc/NEWS b/Misc/NEWS
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -96,6 +96,9 @@
Library
-------
+- Issue #18025: Fixed a segfault in io.BufferedIOBase.readinto() when raw
+ stream's read() returns more bytes than requested.
+
- Issue #18011: base64.b32decode() now raises a binascii.Error if there are
non-alphabet characters present in the input string to conform a docstring.
Updated the module documentation.
diff --git a/Modules/_io/bufferedio.c b/Modules/_io/bufferedio.c
--- a/Modules/_io/bufferedio.c
+++ b/Modules/_io/bufferedio.c
@@ -69,6 +69,14 @@
}
len = Py_SIZE(data);
+ if (len > buf.len) {
+ PyErr_Format(PyExc_ValueError,
+ "read() returned too much data: "
+ "%zd bytes requested, %zd returned",
+ buf.len, len);
+ Py_DECREF(data);
+ goto error;
+ }
memcpy(buf.buf, PyBytes_AS_STRING(data), len);
PyBuffer_Release(&buf);
--
Repository URL: http://hg.python.org/cpython
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