linux-cve-announce - CVE-2024-42228: drm/amdgpu: Using uninitialized value *size when calling amdgpu_vce_cs

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Message-ID: <2024073038-CVE-2024-42228-86f5@gregkh>
Date: Tue, 30 Jul 2024 09:48:26 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-42228: drm/amdgpu: Using uninitialized value *size when calling amdgpu_vce_cs_reloc

Description
===========

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

drm/amdgpu: Using uninitialized value *size when calling amdgpu_vce_cs_reloc

Initialize the size before calling amdgpu_vce_cs_reloc, such as case 0x03000001.
V2: To really improve the handling we would actually
   need to have a separate value of 0xffffffff.(Christian)

The Linux kernel CVE team has assigned CVE-2024-42228 to this issue.


Affected and fixed versions
===========================

	Fixed in 6.6.39 with commit 855ae72c2031
	Fixed in 6.9.9 with commit f8f120b3de48
	Fixed in 6.10 with commit 88a9a467c548

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2024-42228
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/855ae72c20310e5402b2317fc537d911e87537ef
	https://git.kernel.org/stable/c/f8f120b3de48b8b6bdf8988a9b334c2d61c17440
	https://git.kernel.org/stable/c/88a9a467c548d0b3c7761b4fd54a68e70f9c0944