linux-cve-announce - CVE-2022-50524: iommu/mediatek: Check return value after calling platform_get

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Message-ID: <2025100705-CVE-2022-50524-f437@gregkh>
Date: Tue,  7 Oct 2025 17:19:11 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-50524: iommu/mediatek: Check return value after calling platform_get_resource()

From: Greg Kroah-Hartman <gregkh@...nel.org>

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

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

iommu/mediatek: Check return value after calling platform_get_resource()

platform_get_resource() may return NULL pointer, we need check its
return value to avoid null-ptr-deref in resource_size().

The Linux kernel CVE team has assigned CVE-2022-50524 to this issue.


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

	Issue introduced in 5.19 with commit 42d57fc58aebc5801804424082028f43bad1b73c and fixed in 6.0.16 with commit bfebf05883cdcf9ac983033987fae869bd59ca53
	Issue introduced in 5.19 with commit 42d57fc58aebc5801804424082028f43bad1b73c and fixed in 6.1.2 with commit feca904412483b2e0a903dd1f2e2843afd445f8c
	Issue introduced in 5.19 with commit 42d57fc58aebc5801804424082028f43bad1b73c and fixed in 6.2 with commit 73b6924cdebc899de9b719e1319aa86c6bed4acf

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-2022-50524
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/iommu/mtk_iommu.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/bfebf05883cdcf9ac983033987fae869bd59ca53
	https://git.kernel.org/stable/c/feca904412483b2e0a903dd1f2e2843afd445f8c
	https://git.kernel.org/stable/c/73b6924cdebc899de9b719e1319aa86c6bed4acf