linux-cve-announce - CVE-2022-49246: ASoC: atmel: Fix error handling in snd_proto

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Message-ID: <2025022625-CVE-2022-49246-0ed0@gregkh>
Date: Wed, 26 Feb 2025 02:57:31 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49246: ASoC: atmel: Fix error handling in snd_proto_probe

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

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

ASoC: atmel: Fix error handling in snd_proto_probe

The device_node pointer is returned by of_parse_phandle()  with refcount
incremented. We should use of_node_put() on it when done.

This function only calls of_node_put() in the regular path.
And it will cause refcount leak in error paths.
Fix this by calling of_node_put() in error handling too.

The Linux kernel CVE team has assigned CVE-2022-49246 to this issue.


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

	Issue introduced in 4.20 with commit a45f8853a5f95e3760dfbd7ba09d3d597d247040 and fixed in 5.15.33 with commit f32ac9bf5e3f594ef9bfedb410aebc98cf784e69
	Issue introduced in 4.20 with commit a45f8853a5f95e3760dfbd7ba09d3d597d247040 and fixed in 5.16.19 with commit 0f517480d5888cd54487c5662ce4da95b30ad798
	Issue introduced in 4.20 with commit a45f8853a5f95e3760dfbd7ba09d3d597d247040 and fixed in 5.17.2 with commit 8fa969cd8485031294f91fc7184399000cae6355
	Issue introduced in 4.20 with commit a45f8853a5f95e3760dfbd7ba09d3d597d247040 and fixed in 5.18 with commit b0bfaf0544d08d093d6211d7ef8816fb0b5b6c75

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-2022-49246
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/atmel/mikroe-proto.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/f32ac9bf5e3f594ef9bfedb410aebc98cf784e69
	https://git.kernel.org/stable/c/0f517480d5888cd54487c5662ce4da95b30ad798
	https://git.kernel.org/stable/c/8fa969cd8485031294f91fc7184399000cae6355
	https://git.kernel.org/stable/c/b0bfaf0544d08d093d6211d7ef8816fb0b5b6c75