dm clone: Fix UAF in clone_dtr()
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.15.87 by commit 856edd0e92f3fe89606b704c86a93daedddfe6ec, it was introduced in version v5.4 by commit 7431b7835f554f8608b415a02cf3c3f086309e02. For more details please see the references link.