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[3.9] bpo-42146: Fix memory leak in subprocess.Popen() in case of uid/gid overflow (GH-22966) (GH-22980)

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Fix memory leak in subprocess.Popen() in case of uid/gid overflow

Also add a test that would catch this leak with `--huntrleaks`.

Alas, the test for `extra_groups` also exposes an inconsistency
in our error reporting: we use a custom ValueError for `extra_groups`,
but propagate OverflowError for `user` and `group`.
(cherry picked from commit c0590c0033)


Co-authored-by: Alexey Izbyshev <izbyshev@ispras.ru>

Automerge-Triggered-By: GH:gpshead
This commit is contained in:
Miss Skeleton (bot) 2020-10-25 17:34:29 -07:00 • committed by GitHub
parent 0b290dd217
commit c12afa92b0
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3 changed files with 17 additions and 2 deletions
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13
Lib/test/test_subprocess.py
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@ -1826,6 +1826,10 @@ class POSIXProcessTestCase(BaseTestCase):
with self.assertRaises(ValueError):
subprocess.check_call(ZERO_RETURN_CMD, user=-1)
with self.assertRaises(OverflowError):
subprocess.check_call(ZERO_RETURN_CMD,
cwd=os.curdir, env=os.environ, user=2**64)
if pwd is None and name_uid is not None:
with self.assertRaises(ValueError):
subprocess.check_call(ZERO_RETURN_CMD, user=name_uid)
@ -1869,6 +1873,10 @@ class POSIXProcessTestCase(BaseTestCase):
with self.assertRaises(ValueError):
subprocess.check_call(ZERO_RETURN_CMD, group=-1)
with self.assertRaises(OverflowError):
subprocess.check_call(ZERO_RETURN_CMD,
cwd=os.curdir, env=os.environ, group=2**64)
if grp is None:
with self.assertRaises(ValueError):
subprocess.check_call(ZERO_RETURN_CMD, group=name_group)
@ -1917,6 +1925,11 @@ class POSIXProcessTestCase(BaseTestCase):
with self.assertRaises(ValueError):
subprocess.check_call(ZERO_RETURN_CMD, extra_groups=[-1])
with self.assertRaises(ValueError):
subprocess.check_call(ZERO_RETURN_CMD,
cwd=os.curdir, env=os.environ,
extra_groups=[2**64])
if grp is None:
with self.assertRaises(ValueError):
subprocess.check_call(ZERO_RETURN_CMD,