CVE-2026-80785 fbdev: serialize mode sysfs access with lock_fb_info()

In the Linux kernel, the following vulnerability has been resolved: fbdev: serialize mode sysfs access with lockfbinfo showmode, showmodes, and storemode access fbinfo-modelist and fbinfo-mode without holding lockfbinfo. storemodes takes lockfbinfo while replacing the modelist and freeing the old...