CVE-2024-49895drm/amd/display: Fix index out of bounds in DCN30 degamma hardware format translation

Official description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix index out of bounds in DCN30 degamma hardware format translation This commit addresses a potential index out of bounds issue in the `cm3_helper_translate_curve_to_degamma_hw_format` function in the DCN30 color management module. The issue could occur when the index 'i' exceeds the number of transfer function points (TRANSFER_FUNC_POINTS). The fix adds a check to ensure 'i' is within bounds before accessing the transfer function points. If 'i' is out of bounds, the function returns false to indicate an error. Reported by smatch: drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_cm_common.c:338 cm3_helper_translate_curve_to_degamma_hw_format() error: buffer overflow 'output_tf->tf_pts.red' 1025 <= s32max drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_cm_common.c:339 cm3_helper_translate_curve_to_degamma_hw_format() error: buffer overflow 'output_tf->tf_pts.green' 1025 <= s32max drivers/gpu/drm/amd/amdgpu/../display/dc/dcn30/dcn30_cm_common.c:340 cm3_helper_translate_curve_to_degamma_hw_format() error: buffer overflow 'output_tf->tf_pts.blue' 1025 <= s32max

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/ad89f83343a501890cf082c8a584e96b59fe4015
• https://git.kernel.org/stable/c/de6ee4f9e6b1c36b4fdc7c345c1a6de9e246093e
• https://git.kernel.org/stable/c/f3ccd855b4395ce65f10dd37847167f52e122b70
• https://git.kernel.org/stable/c/0d38a0751143afc03faef02d55d31f70374ff843
• https://git.kernel.org/stable/c/f5c3d306de91a4b69cfe3eedb72b42d452593e42
• https://git.kernel.org/stable/c/c4fdc2d6fea129684b82bab90bb52fbace494a58
• https://git.kernel.org/stable/c/bc50b614d59990747dd5aeced9ec22f9258991ff
• https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html