proc/vmcore: fix clearing user buffer by properly using clear_user()
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 v4.14.257 by commit 99d348b82bcb36171f24411d3f1a15706a2a937a, it was introduced in version v3.0 by commit 997c136f518c5debd63847e78e2a8694f56dcf90. For more details please see the references link.