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-rwxr-xr-xLib/test/test_binascii.py3
-rw-r--r--Misc/NEWS3
-rw-r--r--Modules/binascii.c2
3 files changed, 7 insertions, 1 deletions
diff --git a/Lib/test/test_binascii.py b/Lib/test/test_binascii.py
index a631a6a..cd76dbb 100755
--- a/Lib/test/test_binascii.py
+++ b/Lib/test/test_binascii.py
@@ -108,6 +108,9 @@ class BinASCIITest(unittest.TestCase):
self.assertRaises(binascii.Error, binascii.b2a_uu, 46*b"!")
+ # Issue #7701 (crash on a pydebug build)
+ self.assertEqual(binascii.b2a_uu(b'x'), b'!> \n')
+
def test_crc32(self):
crc = binascii.crc32(b"Test the CRC-32 of")
crc = binascii.crc32(b" this string.", crc)
diff --git a/Misc/NEWS b/Misc/NEWS
index f2e2fed..b220306 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -213,6 +213,9 @@ C-API
Library
-------
+- Issue #7701: Fix crash in binascii.b2a_uu() in debug mode when given a
+ 1-byte argument. Patch by Victor Stinner.
+
- Issue #3299: Fix possible crash in the _sre module when given bad
argument values in debug mode. Patch by Victor Stinner.
diff --git a/Modules/binascii.c b/Modules/binascii.c
index 51101b4..833283f 100644
--- a/Modules/binascii.c
+++ b/Modules/binascii.c
@@ -294,7 +294,7 @@ binascii_b2a_uu(PyObject *self, PyObject *args)
}
/* We're lazy and allocate to much (fixed up later) */
- if ( (rv=PyBytes_FromStringAndSize(NULL, bin_len*2+2)) == NULL ) {
+ if ( (rv=PyBytes_FromStringAndSize(NULL, 2 + (bin_len+2)/3*4)) == NULL ) {
PyBuffer_Release(&pbin);
return NULL;
}