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test_timerfd_negative hangs indefinitely, causes system freeze on NetBSD #131263
Description
Bug report
Bug description:
When running the test_timerfd_negative test from test_os.TimerfdTests, the test process hangs indefinitely, cannot be interrupted with Control-C or Control-D, and eventually causes the entire system to freeze.
Configuration:
./configure --with-pydebug
Test
./python -m test test_os -m test_timerfd_negative -v
Output:
== CPython 3.14.0a6+ (heads/main:26511993e63, Mar 15 2025, 00:00:15) [GCC 10.5.0]
== NetBSD-10.0-amd64-x86_64-64bit-ELF little-endian
== Python build: debug
== cwd: /home/blue/cpython/build/test_python_worker_20759æ
== CPU count: 16
== encodings: locale=UTF-8 FS=utf-8
== resources: all test resources are disabled, use -u option to unskip tests
Using random seed: 886729535
0:00:00 load avg: 0.19 Run 1 test sequentially in a single process
0:00:00 load avg: 0.19 [1/1] test_os
test_timerfd_negative (test.test_os.TimerfdTests.test_timerfd_negative) ...
test_timerfd_negative (test.test_os.TimerfdTests.test_timerfd_negative) (flags=0, initial=-1, interval=0) ... FAIL
test_timerfd_negative (test.test_os.TimerfdTests.test_timerfd_negative) (flags=1, initial=-1, interval=0) ... FAIL
test_timerfd_negative (test.test_os.TimerfdTests.test_timerfd_negative) (flags=3, initial=-1, interval=0) ... FAIL
test_timerfd_negative (test.test_os.TimerfdTests.test_timerfd_negative) (flags=0, initial=1, interval=-1) ... FAIL
test_timerfd_negative (test.test_os.TimerfdTests.test_timerfd_negative) (flags=1, initial=1, interval=-1) ... FAIL
test_timerfd_negative (test.test_os.TimerfdTests.test_timerfd_negative) (flags=3, initial=1, interval=-1) ... FAIL
test_timerfd_negative (test.test_os.TimerfdTests.test_timerfd_negative) (flags=0, initial=-1, interval=-1) ... FAIL
test_timerfd_negative (test.test_os.TimerfdTests.test_timerfd_negative) (flags=1, initial=-1, interval=-1) ... FAIL
test_timerfd_negative (test.test_os.TimerfdTests.test_timerfd_negative) (flags=3, initial=-1, interval=-1) ... FAIL
test_timerfd_negative (test.test_os.TimerfdTests.test_timerfd_negative) (flags=0, initial=-0.1, interval=0) ... FAIL
test_timerfd_negative (test.test_os.TimerfdTests.test_timerfd_negative) (flags=1, initial=-0.1, interval=0) ... FAIL
test_timerfd_negative (test.test_os.TimerfdTests.test_timerfd_negative) (flags=3, initial=-0.1, interval=0) ... FAIL
test_timerfd_negative (test.test_os.TimerfdTests.test_timerfd_negative) (flags=0, initial=1, interval=-0.1) ... FAIL
test_timerfd_negative (test.test_os.TimerfdTests.test_timerfd_negative) (flags=1, initial=1, interval=-0.1) ... FAIL
test_timerfd_negative (test.test_os.TimerfdTests.test_timerfd_negative) (flags=3, initial=1, interval=-0.1) ... FAIL
test_timerfd_negative (test.test_os.TimerfdTests.test_timerfd_negative) (flags=0, initial=-0.1, interval=-0.1) ... FAILOS: NetBSD-10.0-amd64
CPython versions tested on:
CPython main branch, 3.13, 3.14
Operating systems tested on:
Other
Activity
[-]NetBSD: test_timerfd_negative hangs indefinitely, causes system freeze[/-][+]test_timerfd_negative hangs indefinitely, causes system freeze on NetBSD[/+]zware commentedon Mar 15, 2025
That seems like a platform bug; the test is just checking that
OSErroris raised for nonsensical arguments.More interestingly, that entire test class is supposed to be skipped except on Linux >=2.6.30, why isn't it?
cc @vstinner, ref gh-108277
vstinner commentedon Mar 18, 2025
@support.requires_linux_version(2, 6, 30)only skips the test on Linux if the kernel is too old.vstinner commentedon Mar 18, 2025
I suggest to skip the test on NetBSD with a reference to this issue.
@furkanonder: Do you want to propose a fix?
Merge branch 'main' into pythongh-131263
furkanonder commentedon Mar 18, 2025
I opened a PR to skip the test on NetBSD.
gh-131263: Skip test_timerfd_negative on NetBSD to prevent system fre…
pythongh-131263: Skip test_timerfd_negative on NetBSD to prevent syst…
[3.13] gh-131263: Skip test_timerfd_negative on NetBSD to prevent sys…
pythongh-131263: Skip test_timerfd_negative on NetBSD to prevent syst…