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

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Message-ID: <2fc2ba4addfbe40f7de3a5dfb146a3bdd3fc3edf.camel@oracle.com>
Date: Mon, 7 Oct 2024 11:01:59 +0000
From: Siddh Raman Pant <siddh.raman.pant@...cle.com>
To: "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
CC: "cve@...nel.org" <cve@...nel.org>,
        "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>
Subject: Re: CVE-2024-42308: drm/amd/display: Check for NULL pointer

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.

> Affected and fixed versions
> ===========================
> 
> 	Fixed in 6.1.103 with commit f068494430d1
> 	Fixed in 6.6.44 with commit 4ccd37085976
> 	Fixed in 6.10.3 with commit 185616085b12
> 	Fixed in 6.11-rc1 with commit 4ab68e168ae1

This also got backported to older kernels.

Thanks,
Siddh

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