gh-155835: fix digest_size data race on BLAKE-2 objects

[picnixz]

• Issue: Ensure that HACL* states are not read concurrently #155835

[picnixz]

Note to myself: I should add tests. I forgot about that and will do it tomorrow probably.

[miss-islington-app]

Thanks @picnixz for the PR 🌮🎉.. I'm working now to backport this PR to: 3.14, 3.15.
🐍🍒⛏🤖 I'm not a witch! I'm not a witch!

[miss-islington-app]

Sorry, @picnixz, I could not cleanly backport this to 3.15 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker 878b5e256aa40c45e12a0cd5c63f8a249f7c3704 3.15

[miss-islington-app]

Sorry, @picnixz, I could not cleanly backport this to 3.14 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker 878b5e256aa40c45e12a0cd5c63f8a249f7c3704 3.14

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 Windows PGO Tailcall 3.x (tier-1) has failed when building commit 878b5e2.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1870/builds/1300) and take a look at the build logs.
4. Check if the failure is related to this commit (878b5e2) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/#/builders/1870/builds/1300

Failed tests:

• test.test_asyncio.test_sslproto
• test_regrtest

Failed subtests:

• test_shutdown_corrupted_ssl_sends_close_notify - test.test_asyncio.test_sslproto.SelectorStartTLSTests.test_shutdown_corrupted_ssl_sends_close_notify
• test_multiprocessing_timeout - test.test_regrtest.ArgsTestCase.test_multiprocessing_timeout

Summary of the results of the build (if available):

==

Click to see traceback logs

Traceback (most recent call last):
  File "C:\bbarea\3.x.itamaro-win64-srv-22-aws.tailcall.pgo\build\Lib\threading.py", line 1218, in _bootstrap_inner
    self._context.run(self.run)
    ~~~~~~~~~~~~~~~~~^^^^^^^^^^
  File "C:\bbarea\3.x.itamaro-win64-srv-22-aws.tailcall.pgo\build\Lib\test\test_asyncio\functional.py", line 227, in run
    self._run()
    ~~~~~~~~~^^
  File "C:\bbarea\3.x.itamaro-win64-srv-22-aws.tailcall.pgo\build\Lib\test\test_asyncio\functional.py", line 261, in _run
    self._test._abort_socket_test(ex)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^
  File "C:\bbarea\3.x.itamaro-win64-srv-22-aws.tailcall.pgo\build\Lib\test\test_asyncio\functional.py", line 110, in _abort_socket_test
    self.fail(ex)
    ~~~~~~~~~^^^^
  File "C:\bbarea\3.x.itamaro-win64-srv-22-aws.tailcall.pgo\build\Lib\unittest\case.py", line 772, in fail
    raise self.failureException(msg)
AssertionError: [WinError 10054] An existing connection was forcibly closed by the remote host
ERROR


Traceback (most recent call last):
  File "C:\bbarea\3.x.itamaro-win64-srv-22-aws.tailcall.pgo\build\Lib\test\test_regrtest.py", line 1939, in test_multiprocessing_timeout
    self.assertRegex(output,
    ~~~~~~~~~~~~~~~~^^^^^^^^
                     re.compile('%s timed out' % testname, re.MULTILINE))
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: Regex didn't match: 'test_regrtest_noop21 timed out' not found in 'Using random seed: 2884225283\n0:00:00 mem: 23.7 MiB Run 1 test in parallel using 1 worker process (timeout: 1.0 sec, worker timeout: 1.5 sec)\n0:00:01 mem: 24.4 MiB [1/1/1] test_regrtest_noop21 worker non-zero exit code (Exit code 1)\nTimeout (0:00:01)!\nThread 0x00000e68 (most recent call first):\n  File "<frozen importlib._bootstrap_external>", line ??? in _path_stat\n  <invalid frame>\n\n== Tests result: FAILURE ==\n\n1 test failed:\n    test_regrtest_noop21\n\nTotal duration: 1.8 sec\nTotal tests: run=0\nTotal test files: run=1/1 failed=1\nResult: FAILURE\n'


Traceback (most recent call last):
  File "C:\bbarea\3.x.itamaro-win64-srv-22-aws.tailcall.pgo\build\Lib\test\test_asyncio\test_sslproto.py", line 950, in test_shutdown_corrupted_ssl_sends_close_notify
    self.loop.run_until_complete(client(srv.addr))
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
  File "C:\bbarea\3.x.itamaro-win64-srv-22-aws.tailcall.pgo\build\Lib\asyncio\base_events.py", line 723, in run_until_complete
    raise RuntimeError('Event loop stopped before Future completed.')
RuntimeError: Event loop stopped before Future completed.


Traceback (most recent call last):
  File "C:\bbarea\3.x.itamaro-win64-srv-22-aws.tailcall.pgo\build\Lib\test\test_asyncio\functional.py", line 255, in _run
    self._handle_client(conn)
    ~~~~~~~~~~~~~~~~~~~^^^^^^
  File "C:\bbarea\3.x.itamaro-win64-srv-22-aws.tailcall.pgo\build\Lib\test\test_asyncio\functional.py", line 264, in _handle_client
    self._prog(TestSocketWrapper(sock))
    ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\bbarea\3.x.itamaro-win64-srv-22-aws.tailcall.pgo\build\Lib\test\test_asyncio\test_sslproto.py", line 920, in server
    sock.unwrap()
    ~~~~~~~~~~~^^
  File "C:\bbarea\3.x.itamaro-win64-srv-22-aws.tailcall.pgo\build\Lib\ssl.py", line 1402, in unwrap
    s = self._sslobj.shutdown()
ConnectionResetError: [WinError 10054] An existing connection was forcibly closed by the remote host