[New-bugs-announce] [issue29190] Avoid possible errors in comparing strings
report at bugs.python.org
Sat Jan 7 02:10:06 EST 2017
New submission from Serhiy Storchaka:
PyUnicode_Compare() and PyUnicode_RichCompare() can raise an exception if one of arguments is not ready unicode object. The result is not always checked for error. Proposed patch gets rid of possible bugs. PyUnicode_Compare() and PyUnicode_RichCompare() in Modules/_pickle.c are replaced with _PyUnicode_EqualToASCIIString() and _PyUnicode_EqualToASCIIId() which never fail. Additional check is added in Modules/_decimal/_decimal.c to ensure that the string which is came from a user code is ready.
All other occurrences of PyUnicode_Compare() seems are called only with ready unicode objects.
components: Extension Modules
stage: patch review
title: Avoid possible errors in comparing strings
versions: Python 3.5, Python 3.6, Python 3.7
Added file: http://bugs.python.org/file46184/unicode_compare.patch
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