CVE-2021-47467

In the Linux kernel, the following vulnerability has been resolved: kunit:
fix reference count leak in kfree_at_end 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 <[email protected]> CHECK: Alignment should match open
parenthesis + kunit_alloc_resource(test, NULL, kfree_res_free, GFP_KERNEL,
(void *)to_free);