[3.6] bpo-33929: multiprocessing: fix handle leak on race condition (GH-7921) #7961
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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)
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Let's not backport this fix to the 3.6 stable branch: #7921 (comment) |
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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)
https://bugs.python.org/issue33929