linux-kernel - [PATCH] kunit: test: Use an action wrapper instead of a cast

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Date:   Wed,  6 Dec 2023 16:22:49 +0800
From:   David Gow <davidgow@...gle.com>
To:     Rae Moar <rmoar@...gle.com>, Shuah Khan <skhan@...uxfoundation.org>
Cc:     David Gow <davidgow@...gle.com>, kunit-dev@...glegroups.com,
        Brendan Higgins <brendan.higgins@...ux.dev>,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] kunit: test: Use an action wrapper instead of a cast

We missed one of the casts of kfree() to kunit_action_t in kunit-test,
which was only enabled when debugfs was in use. This could potentially
break CFI.

Use the existing wrapper function instead.

Signed-off-by: David Gow <davidgow@...gle.com>
---
 lib/kunit/kunit-test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/kunit/kunit-test.c b/lib/kunit/kunit-test.c
index 3e9c5192d095..ee6927c60979 100644
--- a/lib/kunit/kunit-test.c
+++ b/lib/kunit/kunit-test.c
@@ -559,7 +559,7 @@ static void kunit_log_test(struct kunit *test)
 	KUNIT_EXPECT_TRUE(test, test->log->append_newlines);
 
 	full_log = string_stream_get_string(test->log);
-	kunit_add_action(test, (kunit_action_t *)kfree, full_log);
+	kunit_add_action(test, kfree_wrapper, full_log);
 	KUNIT_EXPECT_NOT_ERR_OR_NULL(test,
 				     strstr(full_log, "put this in log."));
 	KUNIT_EXPECT_NOT_ERR_OR_NULL(test,
-- 
2.43.0.rc2.451.g8631bc7472-goog