Vulnerability CVE-2024-27042
Published: 2024-05-01

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

drm/amdgpu: Fix potential out-of-bounds access in 'amdgpu_discovery_reg_base_init()'

The issue arises when the array 'adev->vcn.vcn_config' is accessed
before checking if the index 'adev->vcn.num_vcn_inst' is within the
bounds of the array.

The fix involves moving the bounds check before the array access. This
ensures that 'adev->vcn.num_vcn_inst' is within the bounds of the array
before it is used as an index.

Fixes the below:
drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c:1289 amdgpu_discovery_reg_base_init() error: testing array offset 'adev->vcn.num_vcn_inst' after use.

 References:
https://git.kernel.org/stable/c/8f3e68c6a3fff53c2240762a47a0045d89371775
https://git.kernel.org/stable/c/b33d4af102b9c1f7a83d3f0ad3cab7d2bab8f058
https://git.kernel.org/stable/c/8db10cee51e3e11a6658742465edc21986cf1e8d
https://git.kernel.org/stable/c/cdb637d339572398821204a1142d8d615668f1e9
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