Re: CVE-2024-42308: drm/amd/display: Check for NULL pointer

[gregkh@xxxxxxxxxxxxxxxxxxx]

On Mon, Oct 07, 2024 at 11:01:59AM +0000, Siddh Raman Pant wrote:
> On Sat, 17 Aug 2024 11:10:13 +0200, Greg Kroah-Hartman wrote:
> > In the Linux kernel, the following vulnerability has been resolved:
> > 
> > drm/amd/display: Check for NULL pointer
> > 
> > [why & how]
> > Need to make sure plane_state is initialized
> > before accessing its members.
> > 
> > (cherry picked from commit 295d91cbc700651782a60572f83c24861607b648)
> > 
> > The Linux kernel CVE team has assigned CVE-2024-42308 to this issue.
> 
> This commit is no-op / doesn't make any difference, as there is an
> implicit NULL check rigth above it, as plane_state cannot be NULL
> (checked at the start of function).
> 
> So this CVE should be invalid.

Yeah, tricky code, I see why the static tools got this wrong.  I'll go
invalidate this now, thanks for the report!

greg k-h