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[3.15] gh-149776: Skip UDP Lite tests if it's not supported (GH-149777) #149780

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Merged
vstinner merged 1 commit into from
May 13, 2026
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[3.15] gh-149776: Skip UDP Lite tests if it's not supported (GH-149777) #149780

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gh-149776: Skip UDP Lite tests if it's not supported (GH-149777) 
Fix test_socket on Linux kernel 7.1 and newer: skip UDP Lite tests if
it's not supported.
(cherry picked from commit 3cfc249)

Co-authored-by: Victor Stinner <vstinner@python.org>
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@vstinner @miss-islington
vstinner authored and miss-islington committed May 13, 2026
commit bbfa7feb4c3fa2da19fa459e26c79c5bf8e54f71
24 changes: 20 additions & 4 deletions Lib/test/test_socket.py
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Original file line number Diff line number Diff line change
Expand Up @@ -205,6 +205,25 @@ def _have_socket_hyperv():
return True


def _have_udp_lite():
if not hasattr(socket, "IPPROTO_UDPLITE"):
return False
# Older Android versions block UDPLITE with SELinux.
if support.is_android and platform.android_ver().api_level < 29:
return False

try:
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDPLITE)
except OSError as exc:
# Linux 7.1 removed UDP Lite support
if exc.errno == errno.EPROTONOSUPPORT:
return False
raise
sock.close()

return True


@contextlib.contextmanager
def socket_setdefaulttimeout(timeout):
old_timeout = socket.getdefaulttimeout()
Expand Down Expand Up @@ -247,10 +266,7 @@ def downgrade_malformed_data_warning():

HAVE_SOCKET_VSOCK = _have_socket_vsock()

# Older Android versions block UDPLITE with SELinux.
HAVE_SOCKET_UDPLITE = (
hasattr(socket, "IPPROTO_UDPLITE")
and not (support.is_android and platform.android_ver().api_level < 29))
HAVE_SOCKET_UDPLITE = _have_udp_lite()

HAVE_SOCKET_BLUETOOTH = _have_socket_bluetooth()

Expand Down
2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Tests/2026-05-13-14-53-23.gh-issue-149776.orqgsn.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
Fix test_socket on Linux kernel 7.1 and newer: skip UDP Lite tests if it's
not supported. Patch by Victor Stinner.
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