CVE-2025-21941 drm/amd/display: Fix null check for pipe_ctx->plane_state in resource_build_scaling_params

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Multiple CVEs Addressed in AMD Display Driver Security Updates Two vulnerabilities in the AMD display driver have been addressed. CVE-2025-21941, published on April 1, 2025, involves a null check for pipe_ctx->plane_state, while CVE-2024-49913, published on October 21, 2024, adds a null check for top_pipe_to_program in commit_planes_for_stream. Both vulnerabilities could potentially affect users relying on AMD graphics hardware. 2 sources 64