drm/i915: Fix a memory leak with reused mmap_offset
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 v6.1.9 by commit 0bdc4b4ba7206c452ee81c82fa66e39d0e1780fb, it was introduced in version v5.7 by commit 7865559872074a9ab169c87915504661d630addf. For more details please see the references link.