python / cpython

…-28009) (GH-28041)

(cherry picked from commit d3bdbbf)

Co-authored-by: Steve Dower <steve.dower@python.org>

…8036)

Co-authored-by: Łukasz Langa <lukasz@langa.pl>
(cherry picked from commit 0897253)

Co-authored-by: Miguel Brito <5544985+miguendes@users.noreply.github.com>

Update the vendored copy of libexpat to 2.4.1 (from 2.2.8) to get the
fix for the CVE-2013-0340 "Billion Laughs" vulnerability. This copy
is most used on Windows and macOS.

Co-authored-by: Łukasz Langa <lukasz@langa.pl>
(cherry picked from commit 3fc5d84)

Co-authored-by: Victor Stinner <vstinner@python.org>

…p in pydoc (GH-23200) (GH-28026)

Co-authored-by: Łukasz Langa <lukasz@langa.pl>
(cherry picked from commit c9227df)

Co-authored-by: E-Paine <63801254+E-Paine@users.noreply.github.com>

…) (GH-27999)

(cherry picked from commit 28db1f6)

Co-authored-by: Adam Dangoor <adamdangoor@gmail.com>

… (GH-27996)

Authored-by: Ronald Oussoren <ronaldoussoren@mac.com>
(cherry picked from commit 2ec9428)

Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>

GH-27946) (GH-27974)

Various date parsing utilities in the email module, such as
email.utils.parsedate(), are supposed to gracefully handle invalid
input, typically by raising an appropriate exception or by returning
None.

The internal email._parseaddr._parsedate_tz() helper used by some of
these date parsing routines tries to be robust against malformed input,
but unfortunately it can still crash ungracefully when a non-empty but
whitespace-only input is passed. This manifests as an unexpected
IndexError.

In practice, this can happen when parsing an email with only a newline
inside a ‘Date:’ header, which unfortunately happens occasionally in the
real world.

Here's a minimal example:

    $ python
    Python 3.9.6 (default, Jun 30 2021, 10:22:16)
    [GCC 11.1.0] on linux
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import email.utils
    >>> email.utils.parsedate('foo')
    >>> email.utils.parsedate(' ')
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
      File "/usr/lib/python3.9/email/_parseaddr.py", line 176, in parsedate
        t = parsedate_tz(data)
      File "/usr/lib/python3.9/email/_parseaddr.py", line 50, in parsedate_tz
        res = _parsedate_tz(data)
      File "/usr/lib/python3.9/email/_parseaddr.py", line 72, in _parsedate_tz
        if data[0].endswith(',') or data[0].lower() in _daynames:
    IndexError: list index out of range

The fix is rather straight-forward: guard against empty lists, after
splitting on whitespace, but before accessing the first element.
(cherry picked from commit 989f6a3)

Co-authored-by: wouter bolsterlee <wouter@bolsterl.ee>

GH-27825)

…ted (GH-25099) (GH-27801)

Reverts commit e653d4d and makes
parsing even more strict. Like socket.inet_pton() any leading zero
is now treated as invalid input.

Signed-off-by: Christian Heimes <christian@python.org>

Co-authored-by: Łukasz Langa <lukasz@langa.pl>

bpo-33930: Fix typo in the test name. (GH-27733)
(cherry picked from commit f08e6d1)

Co-authored-by: Benjamin Peterson <benjamin@python.org>

Co-authored-by: Benjamin Peterson <benjamin@python.org>

…d objects (GH-27678) (GH-27721)

(cherry picked from commit bfc2d5a)

Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>

…H-27638) (GH-27713)

(cherry picked from commit c0ab59f)

Co-authored-by: Łukasz Langa <lukasz@langa.pl>

…nd __build_class__ (GH-27647) (GH-27652)

(cherry picked from commit a40675c)

Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>

(cherry picked from commit 2ff5bb4)

Co-authored-by: Dennis Sweeney <36520290+sweeneyde@users.noreply.github.com>

…) (#27276)

Co-authored-by: Łukasz Langa <lukasz@langa.pl>
(cherry picked from commit 64f54b7)

Co-authored-by: andrei kulakov <andrei.avk@gmail.com>

It wasn't actually detecting the regression due to the assertion being too lenient.
(cherry picked from commit e60ab84)

Co-authored-by: Gregory P. Smith <greg@krypto.org>

…26277)

…GH-26895)

(cherry picked from commit b5a52ee)

Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>

…est suite (GH-26542) (GH-26670)

(cherry picked from commit f171877)

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>

…thlib.Path object (GH-25964). (GH-26056)

(cherry picked from commit e9d7f88)

Co-authored-by: Miguel Brito <5544985+miguendes@users.noreply.github.com>

…for extension modules (GH-26025) (#26028)

The address tuple for CAN_RAW no longer returns the address family
after the introduction of CAN ISO-TP support in a30f6d4. However,
updating test_socket.CANTest.testSendFrame was missed as part of the
change, so the test incorrectly attempts to index past the last tuple
item to retrieve the address family.

This removes the now-redundant check for equality against socket.AF_CAN,
as the tuple will not contain the address family.
(cherry picked from commit 355bae8)

Co-authored-by: karl ding <karlding@users.noreply.github.com>

…00 Continue (GH-25916) (#25933)

Fixes http.client potential denial of service where it could get stuck reading lines from a malicious server after a 100 Continue response.

Co-authored-by: Gregory P. Smith <greg@krypto.org>
(cherry picked from commit 47895e3)

Co-authored-by: Gen Xu <xgbarry@gmail.com>

…newline and tabs. (GH-25595) (#25726)

Co-authored-by: Gregory P. Smith <greg@krypto.org>
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
(cherry picked from commit 76cd81d)
Co-authored-by: Senthil Kumaran <senthil@uthcode.com>
Co-authored-by: Senthil Kumaran <skumaran@gatech.edu>

Python 3.8.10

Accessing the following attributes will now fire PEP 578 style audit hooks as (object.__getattr__, obj, name):
* PyTracebackObject: tb_frame
* PyFrameObject: f_code
* PyGenObject: gi_code, gi_frame
* PyCoroObject: cr_code, cr_frame
* PyAsyncGenObject: ag_code, ag_frame
(cherry picked from commit bb2f3ff)

Co-authored-by: Steve Dower <steve.dower@python.org>

…init__ (GH-25818)

(cherry picked from commit c96cc08)

Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>

…GH-8721) (#25811)

Embedded nulls would cause a ValueError to be raised. Thanks go to Eryk Sun for their analysis.

Co-authored-by: Łukasz Langa <lukasz@langa.pl>
(cherry picked from commit 73766b0)

Co-authored-by: Zackery Spytz <zspytz@gmail.com>

This allows reliably forcing macOS universal2 framework builds
to run under Rosetta 2 Intel-64 emulation on Apple Silicon Macs
if needed for testing or when universal2 wheels are not yet
available.
(cherry picked from commit 0cb33da)

Co-authored-by: Ned Deily <nad@python.org>

Automerge-Triggered-By: GH:ned-deily

Co-authored-by: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>

)

* bpo-41100: Support macOS 11 and Apple Silicon on Python 3.8

This is a partial backport of bpo-41100 changes `e8b1c038b14b5fc8120aab62c9bf5fb840274cb6` and `96d906b144e6e6aa96c5ffebecbcc5d38034bbda` for Python 3.8. We introduce the ability to build Python from source for `arm64` on macOS, but we do not make a promise of support. This allows us to omit support for Universal2 binaries as well as weak-linking of symbols from the macOS SDK based on the deployment target, which are larger changes much more difficult to merge.

This also includes a backport of subsequent bpo-42688 change `7e729978fa08a360cbf936dc215ba7dd25a06a08` to fix build errors with external `libffi`.

* bpo-41116: Ensure system supplied libraries are found on macOS 11 (GH-23301) (GH-23455)

On macOS system provided libraries are in a shared library cache
and not at their usual location. This PR teaches distutils to search
in the SDK, even if there was no "-sysroot" argument in
the compiler flags.
(cherry picked from commit 404a719)

* bpo-42504: fix for MACOSX_DEPLOYMENT_TARGET=11 (GH-23556)

macOS releases numbering has changed as of macOS 11 Big Sur.  Previously, major releases were of the form 10.x, 10.x+1, 10.x+2, etc; as of Big Sur, they are now x, x+1, etc, so, for example, 10.15, 10.15.1, ..., 10.15.7, 11, 11.0.1, 11.1, ..., 12, 12.1, etc. Allow Python to build with single-digit deployment target values. Patch provided by FX Coudert.
(cherry picked from commit 5291639)

* bpo-42504: Ensure that get_config_var('MACOSX_DEPLOYMENT_TARGET') is a string (GH-24341) (GH-24410)

* bpo-42504: Ensure that get_config_var('MACOSX_DEPLOYMENT_TARGET') is a string
(cherry picked from commit 49926cf)

Co-authored-by: Ronald Oussoren <ronaldoussoren@mac.com>
Co-authored-by: FX Coudert <fxcoudert@gmail.com>
Co-authored-by: Max Bélanger <aeromax@gmail.com>