Re: [PATCH 6.1.y] drm/amdgpu: Fix potential out-of-bounds access in 'amdgpu_discovery_reg_base_init()'

[Greg KH <gregkh@linuxfoundation.org>]

On Mon, Mar 23, 2026 at 10:51:18AM +0100, Christian König wrote:
> Hi Li,
> 
> On 3/23/26 08:10, Li hongliang wrote:
> > From: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
> > 
> > [ Upstream commit cdb637d339572398821204a1142d8d615668f1e9 ]
> > 
> > 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.
> 
> well this patch only fixed a compiler warning and has not much practical value otherwise.
> 
> Why are you sending this for inclusion into the 6.1 kernel?

Perhaps because it was assigned to CVE-2024-27042?  If this is ONLY a
compiler warning fix, and NOT an actual vulnerability fix, please let
cve@kernel.org know about that and they will revoke this CVE.

thanks,

greg k-h