xfrm: Update ipcomp_scratches with NULL when freed
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 v5.4.220 by commit 18373ed500f7cd53e24d9b0bd0f1c09d78dba87e. For more details please see the references link.