linux-cve-announce - CVE-2024-53133: drm/amd/display: Handle dml allocation failure to avoid crash

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Message-ID: <2024120451-CVE-2024-53133-b0b7@gregkh>
Date: Wed,  4 Dec 2024 15:20:56 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-53133: drm/amd/display: Handle dml allocation failure to avoid crash

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

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

drm/amd/display: Handle dml allocation failure to avoid crash

[Why]
In the case where a dml allocation fails for any reason, the
current state's dml contexts would no longer be valid. Then
subsequent calls dc_state_copy_internal would shallow copy
invalid memory and if the new state was released, a double
free would occur.

[How]
Reset dml pointers in new_state to NULL and avoid invalid
pointer

(cherry picked from commit bcafdc61529a48f6f06355d78eb41b3aeda5296c)

The Linux kernel CVE team has assigned CVE-2024-53133 to this issue.


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

	Fixed in 6.11.10 with commit 874ff59cde8f
	Fixed in 6.12 with commit 6825cb07b79f

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-2024-53133
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_state.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/874ff59cde8fc525112dda26b501a1bac17dde9f
	https://git.kernel.org/stable/c/6825cb07b79ffeb1d90ffaa7a1227462cdca34ae