[PATCH 5.18 208/879] kunit: fix executor OOM error handling logic on non-UML

Greg Kroah-Hartman
2022-06-07T22:21:46Z

From: Daniel Latypov <dlatypov@google.com>

[ Upstream commit 1b11063d32d7e11366e48be64215ff517ce32217 ]

The existing logic happens to work fine on UML, but is not correct when
running on other arches.

1. We didn't initialize `int err`, and kunit_filter_suites() doesn't
explicitly set it to 0 on success. So we had false "failures".
Note: it doesn't happen on UML, causing this to get overlooked.
2. If we error out, we do not call kunit_handle_shutdown().
This makes kunit.py timeout when using a non-UML arch, since the QEMU
process doesn't ever exit.

Fixes: a02353f49162 ("kunit: bail out of test filtering logic quicker if OOM")
Signed-off-by: Daniel Latypov <dlatypov@google.com>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
lib/kunit/executor.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/lib/kunit/executor.c b/lib/kunit/executor.c
index 2f73a6a35a7e..96f96e42ce06 100644
--- a/lib/kunit/executor.c
+++ b/lib/kunit/executor.c
@@ -247,13 +247,13 @@ int kunit_run_all_tests(void)
.start = __kunit_suites_start,
.end = __kunit_suites_end,
};
- int err;
+ int err = 0;

if (filter_glob_param) {
suite_set = kunit_filter_suites(&suite_set, filter_glob_param, &err);
if (err) {
pr_err("kunit executor: error filtering suites: %d\n", err);
- return err;
+ goto out;
}
}

@@ -268,9 +268,10 @@ int kunit_run_all_tests(void)
kunit_free_suite_set(suite_set);
}

- kunit_handle_shutdown();

- return 0;
+out:
+ kunit_handle_shutdown();
+ return err;
}

#if IS_BUILTIN(CONFIG_KUNIT_TEST)
--
2.35.1