CVE-2024-26672

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: Fix variable 'mca_funcs' dereferenced before NULL check in 'amdgpu_mca_smu_get_mca_entry()'

Fixes the below:

drivers/gpu/drm/amd/amdgpu/amdgpu_mca.c:377 amdgpu_mca_smu_get_mca_entry() warn: variable dereferenced before check 'mca_funcs' (see line 368)

357 int amdgpu_mca_smu_get_mca_entry(struct amdgpu_device *adev,

enum amdgpu_mca_error_type type,

358 int idx, struct mca_bank_entry *entry)

359 {

360 const struct amdgpu_mca_smu_funcs *mca_funcs =

adev->mca.mca_funcs;

361 int count;

362

363 switch (type) {

364 case AMDGPU_MCA_ERROR_TYPE_UE:

365 count = mca_funcs->max_ue_count;

mca_funcs is dereferenced here.

366 break;

367 case AMDGPU_MCA_ERROR_TYPE_CE:

368 count = mca_funcs->max_ce_count;

mca_funcs is dereferenced here.

369 break;

370 default:

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References