linux-cve-announce - CVE-2024-53045: ASoC: dapm: fix bounds checker error in dapm_widget_list

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Message-ID: <2024111925-CVE-2024-53045-e1dc@gregkh>
Date: Tue, 19 Nov 2024 18:19:27 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-53045: ASoC: dapm: fix bounds checker error in dapm_widget_list_create

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

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

ASoC: dapm: fix bounds checker error in dapm_widget_list_create

The widgets array in the snd_soc_dapm_widget_list has a __counted_by
attribute attached to it, which points to the num_widgets variable. This
attribute is used in bounds checking, and if it is not set before the
array is filled, then the bounds sanitizer will issue a warning or a
kernel panic if CONFIG_UBSAN_TRAP is set.

This patch sets the size of the widgets list calculated with
list_for_each as the initial value for num_widgets as it is used for
allocating memory for the array. It is updated with the actual number of
added elements after the array is filled.

The Linux kernel CVE team has assigned CVE-2024-53045 to this issue.

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

	Issue introduced in 6.7 with commit 80e698e2df5b and fixed in 6.11.7 with commit c549cb66e8de
	Issue introduced in 6.7 with commit 80e698e2df5b and fixed in 6.12 with commit 2ef9439f7a19

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-2024-53045
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:
	sound/soc/soc-dapm.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/c549cb66e8de0ba1936fc97a59f0156741d3492a
	https://git.kernel.org/stable/c/2ef9439f7a19fd3d43b288d38b1c6e55b668a4fe