linux-cve-announce - CVE-2022-49773: drm/amd/display: Fix optc2

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Message-ID: <2025050116-CVE-2022-49773-2f2e@gregkh>
Date: Thu,  1 May 2025 16:09:23 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-49773: drm/amd/display: Fix optc2_configure warning on dcn314

From: Greg Kroah-Hartman <gregkh@...nel.org>

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

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

drm/amd/display: Fix optc2_configure warning on dcn314

[Why]
dcn314 uses optc2_configure_crc() that wraps
optc1_configure_crc() + set additional registers
not applicable to dcn314.
It's not critical but when used leads to warning like:
WARNING: drivers/gpu/drm/amd/amdgpu/../display/dc/dc_helper.c
Call Trace:
<TASK>
generic_reg_set_ex+0x6d/0xe0 [amdgpu]
optc2_configure_crc+0x60/0x80 [amdgpu]
dc_stream_configure_crc+0x129/0x150 [amdgpu]
amdgpu_dm_crtc_configure_crc_source+0x5d/0xe0 [amdgpu]

[How]
Use optc1_configure_crc() directly

The Linux kernel CVE team has assigned CVE-2022-49773 to this issue.


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

	Fixed in 6.0.10 with commit f67ef5aa88e3db0a13ae3befab2ddf14ac00a91c
	Fixed in 6.1 with commit e7e4f77c991c9abf90924929a9d55f90b0bb78de

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-2022-49773
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/dcn314/dcn314_optc.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/f67ef5aa88e3db0a13ae3befab2ddf14ac00a91c
	https://git.kernel.org/stable/c/e7e4f77c991c9abf90924929a9d55f90b0bb78de