cve/published/2024/CVE-2024-50197.mbox

From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: <linux-cve-announce@vger.kernel.org>
Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org>
Subject: CVE-2024-50197: pinctrl: intel: platform: fix error path in device_for_each_child_node()

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

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

pinctrl: intel: platform: fix error path in device_for_each_child_node()

The device_for_each_child_node() loop requires calls to
fwnode_handle_put() upon early returns to decrement the refcount of
the child node and avoid leaking memory if that error path is triggered.

There is one early returns within that loop in
intel_platform_pinctrl_prepare_community(), but fwnode_handle_put() is
missing.

Instead of adding the missing call, the scoped version of the loop can
be used to simplify the code and avoid mistakes in the future if new
early returns are added, as the child node is only used for parsing, and
it is never assigned.

The Linux kernel CVE team has assigned CVE-2024-50197 to this issue.


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

	Issue introduced in 6.8 with commit c5860e4a2737a8b29dc426c800d01c5be6aad811 and fixed in 6.11.5 with commit be3f7b9f995a6c2ee02767a0319929a2a98adf69
	Issue introduced in 6.8 with commit c5860e4a2737a8b29dc426c800d01c5be6aad811 and fixed in 6.12 with commit 16a6d2e685e8f9a2f51dd5a363d3f97fcad35e22

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-2024-50197
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/pinctrl/intel/pinctrl-intel-platform.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/be3f7b9f995a6c2ee02767a0319929a2a98adf69
	https://git.kernel.org/stable/c/16a6d2e685e8f9a2f51dd5a363d3f97fcad35e22