Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 5.14 01/26] kunit: fix reference count leak in kfree_at_end | Date | Wed, 20 Oct 2021 20:19:58 -0400 |
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From: Xiyu Yang <xiyuyang19@fudan.edu.cn>
[ Upstream commit f62314b1ced25c58b86e044fc951cd6a1ea234cf ]
The reference counting issue happens in the normal path of kfree_at_end(). When kunit_alloc_and_get_resource() is invoked, the function forgets to handle the returned resource object, whose refcount increased inside, causing a refcount leak.
Fix this issue by calling kunit_alloc_resource() instead of kunit_alloc_and_get_resource().
Fixed the following when applying: Shuah Khan <skhan@linuxfoundation.org>
CHECK: Alignment should match open parenthesis + kunit_alloc_resource(test, NULL, kfree_res_free, GFP_KERNEL, (void *)to_free);
Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn> Signed-off-by: Xin Tan <tanxin.ctf@gmail.com> Reviewed-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_test.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/kunit/executor_test.c b/lib/kunit/executor_test.c index cdbe54b16501..e14a18af573d 100644 --- a/lib/kunit/executor_test.c +++ b/lib/kunit/executor_test.c @@ -116,8 +116,8 @@ static void kfree_at_end(struct kunit *test, const void *to_free) /* kfree() handles NULL already, but avoid allocating a no-op cleanup. */ if (IS_ERR_OR_NULL(to_free)) return; - kunit_alloc_and_get_resource(test, NULL, kfree_res_free, GFP_KERNEL, - (void *)to_free); + kunit_alloc_resource(test, NULL, kfree_res_free, GFP_KERNEL, + (void *)to_free); } static struct kunit_suite *alloc_fake_suite(struct kunit *test, -- 2.33.0
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