Check at runtime how various operations for kptr_ref affect its refcount
and verify against the actual count.
Signed-off-by: NKumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20220511194654.765705-5-memxor@gmail.comSigned-off-by: NAlexei Starovoitov <ast@kernel.org>