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[3.11] gh-149776: Skip UDP Lite tests if it's not supported (#149777)#153593

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[3.11] gh-149776: Skip UDP Lite tests if it's not supported (#149777)#153593
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@vstinner vstinner commented Jul 11, 2026 •
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Fix test_socket on Linux kernel 7.1 and newer: skip UDP Lite tests if it's not supported.

(cherry picked from commit 3cfc249)

@vstinner
pythongh-149776: Skip UDP Lite tests if it's not supported (python#14…
0d34ac9 
…9777)

Fix test_socket on Linux kernel 7.1 and newer: skip UDP Lite tests if
it's not supported.

(cherry picked from commit 3cfc249)
@bedevere-app bedevere-app Bot added the tests Tests in the Lib/test dir label Jul 11, 2026
@bedevere-app bedevere-app Bot mentioned this pull request Jul 11, 2026
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@bedevere-app bedevere-app Bot mentioned this pull request Jul 11, 2026
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@vstinner

vstinner commented Jul 11, 2026

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The Linux kernel of the "AMD64 Fedora Stable" buildbot was upgraded from 7.0 to 7.1, 3 days ago, so test_socket started to fail. The Linux kernel 7.1 removes the UDP Lite support. This PR backports a fix from the main branch.

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vstinner commented Jul 11, 2026

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cc @hugovk

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read-the-docs-community Bot commented Jul 11, 2026

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Documentation build overview

📚 cpython-previews | 🛠️ Build #33546640 | 📁 Comparing 0d34ac9 against main (bbd1f2f)

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568 files changed · + 18 added · ± 475 modified · - 75 deleted

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vstinner commented Jul 11, 2026

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macOS / build and test (macos-15-intel): test_ssl fails because it lacks the fix gh-153311 (ssl fix backport).

======================================================================
ERROR: test_load_verify_cadata (test.test_ssl.ContextTests.test_load_verify_cadata)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/runner/work/cpython/cpython/Lib/test/test_ssl.py", line 1535, in test_load_verify_cadata
    ctx.load_verify_locations(cadata=cacert_der)
ssl.SSLError: [ASN1: NOT_ENOUGH_DATA] not enough data (_ssl.c:4057)

======================================================================
ERROR: test_connect_cadata (test.test_ssl.SimpleBackgroundTests.test_connect_cadata)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/runner/work/cpython/cpython/Lib/test/test_ssl.py", line 2181, in test_connect_cadata
    ctx.load_verify_locations(cadata=der)
ssl.SSLError: [ASN1: NOT_ENOUGH_DATA] not enough data (_ssl.c:4057)

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