Merged revisions 77355 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k
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r77355 | antoine.pitrou | 2010-01-07 18:57:31 +0100 (jeu., 07 janv. 2010) | 18 lines
Merged revisions 77352-77354 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
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r77352 | antoine.pitrou | 2010-01-07 18:46:49 +0100 (jeu., 07 janv. 2010) | 5 lines
Issue #7455: Fix possible crash in cPickle on invalid input. Patch by
Florent Xicluna.
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r77353 | antoine.pitrou | 2010-01-07 18:49:37 +0100 (jeu., 07 janv. 2010) | 3 lines
Fix attribution. Florent actually repackaged and reviewed Victor's patch (sorry!).
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r77354 | antoine.pitrou | 2010-01-07 18:54:10 +0100 (jeu., 07 janv. 2010) | 3 lines
Fix reattribution mistake when fixing attribution mistake!
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diff --git a/Lib/test/pickletester.py b/Lib/test/pickletester.py
index 19704ae..7ecc105 100644
--- a/Lib/test/pickletester.py
+++ b/Lib/test/pickletester.py
@@ -1142,6 +1142,9 @@
# Test issue4298
s = bytes([0x58, 0, 0, 0, 0x54])
self.assertRaises(EOFError, pickle.loads, s)
+ # Test issue7455
+ s = b'0'
+ self.assertRaises(pickle.UnpicklingError, pickle.loads, s)
class AbstractPersistentPicklerTests(unittest.TestCase):
diff --git a/Misc/NEWS b/Misc/NEWS
index ec4fa86..eaef311 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -61,6 +61,9 @@
Library
-------
+- Issue #7455: Fix possible crash in cPickle on invalid input. Patch by
+ Victor Stinner.
+
- Issue #6511: ZipFile now raises BadZipfile (instead of an IOError) when
opening an empty or very small file.
diff --git a/Modules/_pickle.c b/Modules/_pickle.c
index 0e6df34..29aed7a 100644
--- a/Modules/_pickle.c
+++ b/Modules/_pickle.c
@@ -3729,7 +3729,7 @@
*/
if (self->num_marks > 0 && self->marks[self->num_marks - 1] == len) {
self->num_marks--;
- } else if (len >= 0) {
+ } else if (len > 0) {
len--;
Py_DECREF(self->stack->data[len]);
self->stack->length = len;