Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Add null checks for 'stream' and 'plane' before dereferencing This commit adds null checks for the 'stream' and 'plane' variables in the dcn30_apply_idle_power_optimizations function. These variables were previously assumed to be null at line 922, but they were used later in the code without checking if they were null. This could potentially lead to a null pointer dereference, which would cause a crash. The null checks ensure that 'stream' and 'plane' are not null before they are used, preventing potential crashes. Fixes the below static smatch checker: drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn30/dcn30_hwseq.c:938 dcn30_apply_idle_power_optimizations() error: we previously assumed 'stream' could be null (see line 922) drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn30/dcn30_hwseq.c:940 dcn30_apply_idle_power_optimizations() error: we previously assumed 'plane' could be null (see line 922)

Weaknesses 1

Affected Products 1

References 6

• git.kernel.org https://git.kernel.org/stable/c/10c20d79d59cadfe572480d98cec271a89ffb024
• git.kernel.org https://git.kernel.org/stable/c/15c2990e0f0108b9c3752d7072a97d45d4283aea
  Patch
• git.kernel.org https://git.kernel.org/stable/c/16a8a2a839d19c4cf7253642b493ffb8eee1d857
  Patch
• git.kernel.org https://git.kernel.org/stable/c/5e84eda48ffb2363437db44bbd0235594f8a58f9
• git.kernel.org https://git.kernel.org/stable/c/fcf9d6a9f30ea414b6b84a6e901cebd44e146847
• lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Remediation

• git.kernel.org https://git.kernel.org/stable/c/15c2990e0f0108b9c3752d7072a97d45d4283aea
  Patch
• git.kernel.org https://git.kernel.org/stable/c/16a8a2a839d19c4cf7253642b493ffb8eee1d857
  Patch