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 v4.9.331 by commit debca61df6bc2f65e020656c9c5b878d6b38d30f. For more details please see the references link.