CVE-2021-47467 Information

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);

Reference

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