[3.7] bpo-33929: multiprocessing: fix handle leak on race condition (GH-7921) #7960
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…GH-7921) Fix a race condition in Popen of multiprocessing.popen_spawn_win32. The child process now duplicates the read end of pipe instead of "stealing" it. Previously, the read end of pipe was "stolen" by the child process, but it leaked a handle if the child process had been terminated before it could steal the handle from the parent process. (cherry picked from commit 2cc9d21) Co-authored-by: Victor Stinner <vstinner@redhat.com>
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@vstinner: Backport status check is done, and it's a success ✅ . |
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Oh. I approved the PR, but then I blocked it by voting -1 and... the bot merged the PR anyway :-( I reported the bot bug: python/miss-islington#111 |
Fix a race condition in Popen of
multiprocessing.popen_spawn_win32. The child process now duplicates
the read end of pipe instead of "stealing" it.
Previously, the read end of pipe was "stolen" by the child process,
but it leaked a handle if the child process had been terminated
before it could steal the handle from the parent process.
(cherry picked from commit 2cc9d21)
Co-authored-by: Victor Stinner vstinner@redhat.com
https://bugs.python.org/issue33929