linux-cve-announce - CVE-2022-49284: coresight: syscfg: Fix memleak on registration failure in cscfg_create

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Message-ID: <2025022632-CVE-2022-49284-f545@gregkh>
Date: Wed, 26 Feb 2025 02:58:09 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49284: coresight: syscfg: Fix memleak on registration failure in cscfg_create_device

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

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

coresight: syscfg: Fix memleak on registration failure in cscfg_create_device

device_register() calls device_initialize(),
according to doc of device_initialize:

    Use put_device() to give up your reference instead of freeing
    * @dev directly once you have called this function.

To prevent potential memleak, use put_device() for error handling.

The Linux kernel CVE team has assigned CVE-2022-49284 to this issue.


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

	Issue introduced in 5.15 with commit 85e2414c518a03a21dddd4bc88fec2723c5e1197 and fixed in 5.15.33 with commit c61e2fc87f24cae4701f352fe9ecd4c5c143106c
	Issue introduced in 5.15 with commit 85e2414c518a03a21dddd4bc88fec2723c5e1197 and fixed in 5.16.19 with commit a529af1f5a5c096f3e18f0d5a32cfcc3d82df1ec
	Issue introduced in 5.15 with commit 85e2414c518a03a21dddd4bc88fec2723c5e1197 and fixed in 5.17.2 with commit 412225b32986d5b11c3c1ad9234c50a3f5c52c76
	Issue introduced in 5.15 with commit 85e2414c518a03a21dddd4bc88fec2723c5e1197 and fixed in 5.18 with commit cfa5dbcdd7aece76f3415284569f2f384aff0253

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-2022-49284
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/hwtracing/coresight/coresight-syscfg.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/c61e2fc87f24cae4701f352fe9ecd4c5c143106c
	https://git.kernel.org/stable/c/a529af1f5a5c096f3e18f0d5a32cfcc3d82df1ec
	https://git.kernel.org/stable/c/412225b32986d5b11c3c1ad9234c50a3f5c52c76
	https://git.kernel.org/stable/c/cfa5dbcdd7aece76f3415284569f2f384aff0253