In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Check index msgid before read or write [WHAT] msgid is used as an array index and it cannot be a negative value, and therefore cannot be equal to MODHDCPMESSAGEIDINVALID (-1). [HOW] Check whether msg_id is valid before reading and setting. This fixes 4 OVERRUN issues reported by Coverity.