CVE-2026-98142 drm/cirrus-qemu: Validate BAR0 size during probe

In the Linux kernel, the following vulnerability has been resolved: drm/cirrus-qemu: Validate BAR0 size during probe The cirrus-qemu driver relies on CIRRUSVRAMSIZE 4 MB to validate framebuffer sizes. However, during PCI probe, the driver mapped BAR0 without verifying that its size matches...