linux-cve-announce - CVE-2022-49233: drm/amd/display: Call dc_stream

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Message-ID: <2025022623-CVE-2022-49233-43db@gregkh>
Date: Wed, 26 Feb 2025 02:57:18 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49233: drm/amd/display: Call dc_stream_release for remove link enc assignment

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

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

drm/amd/display: Call dc_stream_release for remove link enc assignment

[Why]
A porting error resulted in the stream assignment for the link
being retained without being released - a memory leak.

[How]
Fix the porting error by adding back the dc_stream_release() intended
as part of the original patch.

The Linux kernel CVE team has assigned CVE-2022-49233 to this issue.


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

	Issue introduced in 5.17 with commit 0bb24555858403671657f6dc025d2931e3e857bb and fixed in 5.17.2 with commit a28b7b6a0c827ce672edcdb5b2b5916b0beebe03
	Issue introduced in 5.17 with commit 0bb24555858403671657f6dc025d2931e3e857bb and fixed in 5.18 with commit f2bde8349c35d01d7c50456ea06a5c7d5e0e5ed0

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-2022-49233
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/display/dc/core/dc_link_enc_cfg.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/a28b7b6a0c827ce672edcdb5b2b5916b0beebe03
	https://git.kernel.org/stable/c/f2bde8349c35d01d7c50456ea06a5c7d5e0e5ed0