Merged revisions 74189 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r74189 | amaury.forgeotdarc | 2009-07-23 21:26:02 +0200 (jeu., 23 juil. 2009) | 4 lines

  #6553: crash in cPickle.load(), when given a StringIO with incomplete data.

  Will backport to 2.6, 3.x already fixed a similar issue with issue4298.
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diff --git a/Modules/cPickle.c b/Modules/cPickle.c
index 1cef5c1..8fa4a66 100644
--- a/Modules/cPickle.c
+++ b/Modules/cPickle.c
@@ -663,6 +663,12 @@
 	self->last_string = str;
 
 	if (! (*s = PyString_AsString(str))) return -1;
+
+	if (PyString_GET_SIZE(str) != n) {
+		PyErr_SetNone(PyExc_EOFError);
+		return -1;
+	}
+
 	return n;
 }