linux-cve-announce - CVE-2024-56666: drm/amdkfd: Dereference null return value

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Message-ID: <2024122753-CVE-2024-56666-93aa@gregkh>
Date: Fri, 27 Dec 2024 16:07:03 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-56666: drm/amdkfd: Dereference null return value

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

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

drm/amdkfd: Dereference null return value

In the function pqm_uninit there is a call-assignment of "pdd =
kfd_get_process_device_data" which could be null, and this value was
later dereferenced without checking.

The Linux kernel CVE team has assigned CVE-2024-56666 to this issue.


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

	Issue introduced in 6.12 with commit fb91065851cd5f2735348c5f3eddeeca3d7c2973 and fixed in 6.12.6 with commit 768442d918932c4da09003f1fd6be1750b93a4ba
	Issue introduced in 6.12 with commit fb91065851cd5f2735348c5f3eddeeca3d7c2973 and fixed in 6.13-rc3 with commit a592bb19abdc2072875c87da606461bfd7821b08

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-2024-56666
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/amdkfd/kfd_process_queue_manager.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/768442d918932c4da09003f1fd6be1750b93a4ba
	https://git.kernel.org/stable/c/a592bb19abdc2072875c87da606461bfd7821b08