Actually allocate a buffer that is the correct size.
diff --git a/tests/hazmat/backends/test_openssl.py b/tests/hazmat/backends/test_openssl.py
index e055568..0b55a48 100644
--- a/tests/hazmat/backends/test_openssl.py
+++ b/tests/hazmat/backends/test_openssl.py
@@ -611,10 +611,11 @@
def test_pem_password_cb(self):
password = b'abcdefg'
+ buf_size = len(password) + 1
ffi_cb, userdata = backend._pem_password_cb(password)
handle = backend._ffi.new_handle(userdata)
- buf = backend._ffi.new('char *')
- assert ffi_cb(buf, len(password) + 1, False, handle) == len(password)
+ buf = backend._ffi.new('char[]', buf_size)
+ assert ffi_cb(buf, buf_size, False, handle) == len(password)
assert userdata.called == 1
assert backend._ffi.string(buf, len(password)) == password