linux-cve-announce - CVE-2022-49510: drm/omap: fix NULL but dereferenced coccicheck error

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Message-ID: <2025022609-CVE-2022-49510-389b@gregkh>
Date: Wed, 26 Feb 2025 03:13:04 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49510: drm/omap: fix NULL but dereferenced coccicheck error

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

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

drm/omap: fix NULL but dereferenced coccicheck error

Fix the following coccicheck warning:
./drivers/gpu/drm/omapdrm/omap_overlay.c:89:22-25: ERROR: r_ovl is NULL
but dereferenced.

Here should be ovl->idx rather than r_ovl->idx.

The Linux kernel CVE team has assigned CVE-2022-49510 to this issue.


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

	Issue introduced in 5.17 with commit e02b5cc9e898ad6f223a69df63397beae60390ff and fixed in 5.17.14 with commit d2507be660310bb9bcca918f81f49b8bba07e462
	Issue introduced in 5.17 with commit e02b5cc9e898ad6f223a69df63397beae60390ff and fixed in 5.18.3 with commit 08d9a75eab594ca508a440db7c73064498d26687
	Issue introduced in 5.17 with commit e02b5cc9e898ad6f223a69df63397beae60390ff and fixed in 5.19 with commit 8f2a3970c969d0d8d7289a4c65edcedafc16fd92

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-2022-49510
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/omapdrm/omap_overlay.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/d2507be660310bb9bcca918f81f49b8bba07e462
	https://git.kernel.org/stable/c/08d9a75eab594ca508a440db7c73064498d26687
	https://git.kernel.org/stable/c/8f2a3970c969d0d8d7289a4c65edcedafc16fd92