CVE-2024-26672

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: 371 return -EINVAL; 372 } 373 374 if (idx >= count) 375 return
-EINVAL; 376 377 if (mca_funcs && mca_funcs->mca_get_mca_entry) ^^^^^^^^^
Checked too late!