xfrm: fix MTU regression
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 v4.19.233 by commit 20fe64c54412ca42efb9ba07f856ed8cac6e007e, it was introduced in version v4.15 by commit 749439bfac6e1a2932c582e2699f91d329658196. For more details please see the references link.