linux-cve-announce - CVE-2022-49125: drm/sprd: fix potential NULL dereference

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Message-ID: <2025022604-CVE-2022-49125-5909@gregkh>
Date: Wed, 26 Feb 2025 02:55:30 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49125: drm/sprd: fix potential NULL dereference

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

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

drm/sprd: fix potential NULL dereference

'drm' could be null in sprd_drm_shutdown, and drm_warn maybe dereference
it, remove this warning log.


v1 -> v2:
- Split checking platform_get_resource() return value to a separate patch
- Use dev_warn() instead of removing the warning log

The Linux kernel CVE team has assigned CVE-2022-49125 to this issue.


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

	Fixed in 5.17.3 with commit c3acc8db1bc221604e2db9807f01d8a44b97a64d
	Fixed in 5.18 with commit 8668658aebb0a19d877d5a81c004baf716c4aaa6

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-2022-49125
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/sprd/sprd_drm.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/c3acc8db1bc221604e2db9807f01d8a44b97a64d
	https://git.kernel.org/stable/c/8668658aebb0a19d877d5a81c004baf716c4aaa6