linux-cve-announce - CVE-2024-50108: drm/amd/display: Disable PSR-SU on Parade 08-01 TCON too

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Message-ID: <2024110554-CVE-2024-50108-e842@gregkh>
Date: Tue,  5 Nov 2024 18:10:57 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-50108: drm/amd/display: Disable PSR-SU on Parade 08-01 TCON too

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

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

drm/amd/display: Disable PSR-SU on Parade 08-01 TCON too

Stuart Hayhurst has found that both at bootup and fullscreen VA-API video
is leading to black screens for around 1 second and kernel WARNING [1] traces
when calling dmub_psr_enable() with Parade 08-01 TCON.

These symptoms all go away with PSR-SU disabled for this TCON, so disable
it for now while DMUB traces [2] from the failure can be analyzed and the failure
state properly root caused.

(cherry picked from commit afb634a6823d8d9db23c5fb04f79c5549349628b)

The Linux kernel CVE team has assigned CVE-2024-50108 to this issue.


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

	Fixed in 6.1.115 with commit 5660bcc4dd53
	Fixed in 6.6.59 with commit c79e0a18e4b3
	Fixed in 6.11.6 with commit fc6afa07b5e2
	Fixed in 6.12-rc5 with commit ba1959f71117

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-2024-50108
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/modules/power/power_helpers.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/5660bcc4dd533005248577d5042f1c48cce2b443
	https://git.kernel.org/stable/c/c79e0a18e4b301401bb745702830be9041cfbf04
	https://git.kernel.org/stable/c/fc6afa07b5e251148fb37600ee06e1a7007178c3
	https://git.kernel.org/stable/c/ba1959f71117b27f3099ee789e0815360b4081dd