linux-cve-announce - CVE-2022-49681: xtensa: xtfpga: Fix refcount leak bug in setup

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Message-ID: <2025022625-CVE-2022-49681-faa1@gregkh>
Date: Wed, 26 Feb 2025 03:24:04 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49681: xtensa: xtfpga: Fix refcount leak bug in setup

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

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

xtensa: xtfpga: Fix refcount leak bug in setup

In machine_setup(), of_find_compatible_node() will return a node
pointer with refcount incremented. We should use of_node_put() when
it is not used anymore.

The Linux kernel CVE team has assigned CVE-2022-49681 to this issue.


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

	Fixed in 4.9.321 with commit b12d5c52f073a0420622aaf2f21b615cce8b36cc
	Fixed in 4.14.286 with commit 35d7e961be68732eb3acaeba81fb81ca16eafd05
	Fixed in 4.19.250 with commit 0715d0e60052662c3f225342062f174dd721d1c7
	Fixed in 5.4.202 with commit a52972ee706b438302eb0350e61f378eb191e3d1
	Fixed in 5.10.127 with commit 6c0839cf1b9e1b3c88da6af76794583cbfae8da3
	Fixed in 5.15.51 with commit 0162451723178602c37f0555d235dfa17e486112
	Fixed in 5.18.8 with commit 9b30c5c8884eda3f541229899671cebbad15979b
	Fixed in 5.19 with commit 173940b3ae40114d4179c251a98ee039dc9cd5b3

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-2022-49681
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:
	arch/xtensa/platforms/xtfpga/setup.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/b12d5c52f073a0420622aaf2f21b615cce8b36cc
	https://git.kernel.org/stable/c/35d7e961be68732eb3acaeba81fb81ca16eafd05
	https://git.kernel.org/stable/c/0715d0e60052662c3f225342062f174dd721d1c7
	https://git.kernel.org/stable/c/a52972ee706b438302eb0350e61f378eb191e3d1
	https://git.kernel.org/stable/c/6c0839cf1b9e1b3c88da6af76794583cbfae8da3
	https://git.kernel.org/stable/c/0162451723178602c37f0555d235dfa17e486112
	https://git.kernel.org/stable/c/9b30c5c8884eda3f541229899671cebbad15979b
	https://git.kernel.org/stable/c/173940b3ae40114d4179c251a98ee039dc9cd5b3