linux-cve-announce - CVE-2022-49106: staging: vchiq_arm: Avoid NULL ptr deref in vchiq_dump_platform

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Message-ID: <2025022601-CVE-2022-49106-7fa5@gregkh>
Date: Wed, 26 Feb 2025 02:55:11 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49106: staging: vchiq_arm: Avoid NULL ptr deref in vchiq_dump_platform_instances

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

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

staging: vchiq_arm: Avoid NULL ptr deref in vchiq_dump_platform_instances

vchiq_get_state() can return a NULL pointer. So handle this cases and
avoid a NULL pointer derefence in vchiq_dump_platform_instances.

The Linux kernel CVE team has assigned CVE-2022-49106 to this issue.


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

	Fixed in 5.15.34 with commit 176df12b38c70b0a45e6392a0ee5bc83489dfc29
	Fixed in 5.16.20 with commit 4627250cabaa80278d3ab01ad107893cea83799f
	Fixed in 5.17.3 with commit 51e5e5c34c22c0bfec0808d8c33e0b2fcf4c7c89
	Fixed in 5.18 with commit aa899e686d442c63d50f4d369cc02dbbf0941cb0

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-2022-49106
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/staging/vc04_services/interface/vchiq_arm/vchiq_arm.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/176df12b38c70b0a45e6392a0ee5bc83489dfc29
	https://git.kernel.org/stable/c/4627250cabaa80278d3ab01ad107893cea83799f
	https://git.kernel.org/stable/c/51e5e5c34c22c0bfec0808d8c33e0b2fcf4c7c89
	https://git.kernel.org/stable/c/aa899e686d442c63d50f4d369cc02dbbf0941cb0