drm/edid: In connectorbadedid() cap numofext by num_blocks read
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 v5.15 by commit 97794170b696856483f74b47bfb6049780d2d3a0, it was introduced in version v5.7 by commit e11f5bd8228fc3760c221f940b9f6365dbf3e7ed. For more details please see the references link.