python / python/cpython

RecvmsgIntoSCMRightsStreamTest and RecvmsgSCMRightsStreamTest fails on NetBSD

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3.13 3.14 3.15 OS-netbsd tests type-bug
Dominant language
Python
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Description

Bug report

Bug description:
./python -m test -v test_socket -m RecvmsgIntoSCMRightsStreamTest -m RecvmsgSCMRightsStreamTest

== CPython 3.14.0a1+ (heads/main-dirty:37986e830ba, Oct 17 2024, 20:11:54) [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_29434æ
== CPU count: 4
== encodings: locale=UTF-8 FS=utf-8
== resources: all test resources are disabled, use -u option to unskip tests

Using random seed: 2380016540
0:00:00 load avg: 0.18 Run 1 test sequentially in a single process
0:00:00 load avg: 0.18 [1/1] test_socket
testCmsgTrunc0 (test.test_socket.RecvmsgIntoSCMRightsStreamTest.testCmsgTrunc0) ... ok
testCmsgTrunc1 (test.test_socket.RecvmsgIntoSCMRightsStreamTest.testCmsgTrunc1) ... ok
testCmsgTrunc2Int (test.test_socket.RecvmsgIntoSCMRightsStreamTest.testCmsgTrunc2Int) ... ok
testCmsgTruncLen0 (test.test_socket.RecvmsgIntoSCMRightsStreamTest.testCmsgTruncLen0) ... ok
testCmsgTruncLen0Minus1 (test.test_socket.RecvmsgIntoSCMRightsStreamTest.testCmsgTruncLen0Minus1) ... ok
testCmsgTruncLen0Plus1 (test.test_socket.RecvmsgIntoSCMRightsStreamTest.testCmsgTruncLen0Plus1) ... ok
testCmsgTruncLen1 (test.test_socket.RecvmsgIntoSCMRightsStreamTest.testCmsgTruncLen1) ... ok
testCmsgTruncLen2Minus1 (test.test_socket.RecvmsgIntoSCMRightsStreamTest.testCmsgTruncLen2Minus1) ... ok
testCmsgTruncNoBufSize (test.test_socket.RecvmsgIntoSCMRightsStreamTest.testCmsgTruncNoBufSize) ... ok
testFDPassCMSG_LEN (test.test_socket.RecvmsgIntoSCMRightsStreamTest.testFDPassCMSG_LEN) ... ok
testFDPassCMSG_SPACE (test.test_socket.RecvmsgIntoSCMRightsStreamTest.testFDPassCMSG_SPACE) ... ok
testFDPassEmpty (test.test_socket.RecvmsgIntoSCMRightsStreamTest.testFDPassEmpty) ... ok
testFDPassPartialInt (test.test_socket.RecvmsgIntoSCMRightsStreamTest.testFDPassPartialInt) ... ok
testFDPassPartialIntInMiddle (test.test_socket.RecvmsgIntoSCMRightsStreamTest.testFDPassPartialIntInMiddle) ... ok
testFDPassSeparate (test.test_socket.RecvmsgIntoSCMRightsStreamTest.testFDPassSeparate) ... FAIL
testFDPassSeparateMinSpace (test.test_socket.RecvmsgIntoSCMRightsStreamTest.testFDPassSeparateMinSpace) ... FAIL
testFDPassSimple (test.test_socket.RecvmsgIntoSCMRightsStreamTest.testFDPassSimple) ... ok
testMultipleFDPass (test.test_socket.RecvmsgIntoSCMRightsStreamTest.testMultipleFDPass) ... ok
testCmsgTrunc0 (test.test_socket.RecvmsgSCMRightsStreamTest.testCmsgTrunc0) ... ok
testCmsgTrunc1 (test.test_socket.RecvmsgSCMRightsStreamTest.testCmsgTrunc1) ... ok
testCmsgTrunc2Int (test.test_socket.RecvmsgSCMRightsStreamTest.testCmsgTrunc2Int) ... ok
testCmsgTruncLen0 (test.test_socket.RecvmsgSCMRightsStreamTest.testCmsgTruncLen0) ... ok
testCmsgTruncLen0Minus1 (test.test_socket.RecvmsgSCMRightsStreamTest.testCmsgTruncLen0Minus1) ... ok
testCmsgTruncLen0Plus1 (test.test_socket.RecvmsgSCMRightsStreamTest.testCmsgTruncLen0Plus1) ... ok
testCmsgTruncLen1 (test.test_socket.RecvmsgSCMRightsStreamTest.testCmsgTruncLen1) ... ok
testCmsgTruncLen2Minus1 (test.test_socket.RecvmsgSCMRightsStreamTest.testCmsgTruncLen2Minus1) ... ok
testCmsgTruncNoBufSize (test.test_socket.RecvmsgSCMRightsStreamTest.testCmsgTruncNoBufSize) ... ok
testFDPassCMSG_LEN (test.test_socket.RecvmsgSCMRightsStreamTest.testFDPassCMSG_LEN) ... ok
testFDPassCMSG_SPACE (test.test_socket.RecvmsgSCMRightsStreamTest.testFDPassCMSG_SPACE) ... ok
testFDPassEmpty (test.test_socket.RecvmsgSCMRightsStreamTest.testFDPassEmpty) ... ok
testFDPassPartialInt (test.test_socket.RecvmsgSCMRightsStreamTest.testFDPassPartialInt) ... ok
testFDPassPartialIntInMiddle (test.test_socket.RecvmsgSCMRightsStreamTest.testFDPassPartialIntInMiddle) ... ok
testFDPassSeparate (test.test_socket.RecvmsgSCMRightsStreamTest.testFDPassSeparate) ... FAIL
testFDPassSeparateMinSpace (test.test_socket.RecvmsgSCMRightsStreamTest.testFDPassSeparateMinSpace) ... FAIL
testFDPassSimple (test.test_socket.RecvmsgSCMRightsStreamTest.testFDPassSimple) ... ok
testMultipleFDPass (test.test_socket.RecvmsgSCMRightsStreamTest.testMultipleFDPass) ... ok

======================================================================
FAIL: testFDPassSeparate (test.test_socket.RecvmsgIntoSCMRightsStreamTest.testFDPassSeparate)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/blue/cpython/Lib/test/test_socket.py", line 3747, in testFDPassSeparate
    self.checkRecvmsgFDs(2,
    ~~~~~~~~~~~~~~~~~~~~^^^
                         self.doRecvmsg(self.serv_sock, len(MSG), 10240),
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                         maxcmsgs=2)
                         ^^^^^^^^^^^
  File "/home/blue/cpython/Lib/test/test_socket.py", line 3692, in checkRecvmsgFDs
    self.assertEqual(len(fds), numfds)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
AssertionError: 1 != 2

======================================================================
FAIL: testFDPassSeparateMinSpace (test.test_socket.RecvmsgIntoSCMRightsStreamTest.testFDPassSeparateMinSpace)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/blue/cpython/Lib/test/test_socket.py", line 3772, in testFDPassSeparateMinSpace
    self.checkRecvmsgFDs(num_fds,
    ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
                         self.doRecvmsg(self.serv_sock, len(MSG),
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                                        socket.CMSG_SPACE(SIZEOF_INT) +
                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                                        socket.CMSG_LEN(SIZEOF_INT * num_fds)),
                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                         maxcmsgs=2, ignoreflags=socket.MSG_CTRUNC)
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/blue/cpython/Lib/test/test_socket.py", line 3692, in checkRecvmsgFDs
    self.assertEqual(len(fds), numfds)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
AssertionError: 1 != 2

======================================================================
FAIL: testFDPassSeparate (test.test_socket.RecvmsgSCMRightsStreamTest.testFDPassSeparate)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/blue/cpython/Lib/test/test_socket.py", line 3747, in testFDPassSeparate
    self.checkRecvmsgFDs(2,
    ~~~~~~~~~~~~~~~~~~~~^^^
                         self.doRecvmsg(self.serv_sock, len(MSG), 10240),
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                         maxcmsgs=2)
                         ^^^^^^^^^^^
  File "/home/blue/cpython/Lib/test/test_socket.py", line 3692, in checkRecvmsgFDs
    self.assertEqual(len(fds), numfds)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
AssertionError: 1 != 2

======================================================================
FAIL: testFDPassSeparateMinSpace (test.test_socket.RecvmsgSCMRightsStreamTest.testFDPassSeparateMinSpace)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/blue/cpython/Lib/test/test_socket.py", line 3772, in testFDPassSeparateMinSpace
    self.checkRecvmsgFDs(num_fds,
    ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
                         self.doRecvmsg(self.serv_sock, len(MSG),
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                                        socket.CMSG_SPACE(SIZEOF_INT) +
                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                                        socket.CMSG_LEN(SIZEOF_INT * num_fds)),
                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                         maxcmsgs=2, ignoreflags=socket.MSG_CTRUNC)
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/blue/cpython/Lib/test/test_socket.py", line 3692, in checkRecvmsgFDs
    self.assertEqual(len(fds), numfds)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
AssertionError: 1 != 2

----------------------------------------------------------------------
Ran 36 tests in 2.169s

FAILED (failures=4)
test test_socket failed
test_socket failed (4 failures)

== Tests result: FAILURE ==

1 test failed:
    test_socket

Total duration: 2.4 sec
Total tests: run=36 (filtered) failures=4
Total test files: run=1/1 (filtered) failed=1
Result: FAILURE

OS: NetBSD 10.0 amd64

CPython versions tested on:

CPython main branch

Operating systems tested on:

Other

Linked PRs
  • gh-154239
  • gh-154245
  • gh-154246
  • gh-154247

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with Lib/test/test_socket.py, especially testFDPassSeparate and testFDPassSeparateMinSpace in the RecvmsgIntoSCMRightsStreamTest and RecvmsgSCMRightsStreamTest classes. Reproduce the filtered test command on NetBSD and inspect the failing descriptor-count assertions; done means all four tests pass without changing the expected behavior on other platforms. Several linked PRs indicate that work is already underway.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
networking, operating-systems, testing-qa
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
25/100

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