kunit: fix reference count leak in kfree_at_end

Vulnerability Description

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 <skhan@linuxfoundation.org> CHECK: Alignment should match open parenthesis + kunit_alloc_resource(test, NULL, kfree_res_free, GFP_KERNEL, (void *)to_free);

References

• https://git.kernel.org/stable/c/bbdd158b40b66a9403391a517f24ef6613573446
• https://git.kernel.org/stable/c/f62314b1ced25c58b86e044fc951cd6a1ea234cf