Reject embedded null characters in wchar* strings

vstinner

BPO	13617
Nosy	@vstinner, @ezio-melotti, @benhoyt, @serhiy-storchaka
PRs	[security] bpo-13617: Reject embedded null characters in wchar* strings. #2302 [3.6] bpo-13617: Reject embedded null characters in wchar* strings. (GH-2302) #2462 [3.5] bpo-13617: Reject embedded null characters in wchar* strings. (GH-2302) #2463 Fix compiler warnings introduced in bpo-13617. #2464
Dependencies	bpo-30708: Ensure that the result of PyUnicode_AsWideCharString() doesn't contain null characters if size is not returned
Files	embedded_nul.patch doc_unicode.patch: added warnings to concerned functions doc_unicode-2.patch embedded_nul-2.patch

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/serhiy-storchaka'
closed_at = <Date 2017-06-28.08:22:41.245>
created_at = <Date 2011-12-17.03:53:41.721>
labels = ['type-security', '3.7', 'library', 'expert-unicode']
title = 'Reject embedded null characters in wchar* strings'
updated_at = <Date 2017-06-28.09:24:05.176>
user = 'https://github.com/vstinner'

bugs.python.org fields:

activity = <Date 2017-06-28.09:24:05.176>
actor = 'vstinner'
assignee = 'serhiy.storchaka'
closed = True
closed_date = <Date 2017-06-28.08:22:41.245>
closer = 'serhiy.storchaka'
components = ['Library (Lib)', 'Unicode']
creation = <Date 2011-12-17.03:53:41.721>
creator = 'vstinner'
dependencies = ['30708']
files = ['23984', '24034', '24037', '24041']
hgrepos = []
issue_num = 13617
keywords = ['patch']
message_count = 22.0
messages = ['149656', '149657', '149783', '149787', '149791', '149794', '149802', '173147', '221844', '226414', '236699', '296241', '296332', '296461', '296512', '297132', '297155', '297156', '297158', '297161', '297162', '297165']
nosy_count = 6.0
nosy_names = ['vstinner', 'ezio.melotti', 'benhoyt', 'python-dev', 'arnaudc', 'serhiy.storchaka']
pr_nums = ['2302', '2462', '2463', '2464']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'security'
url = 'https://bugs.python.org/issue13617'
versions = ['Python 3.5', 'Python 3.6', 'Python 3.7']