linux-cve-announce - CVE-2024-50166: fsl/fman: Fix refcount handling of fman-related devices

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Message-ID: <2024110748-CVE-2024-50166-7fde@gregkh>
Date: Thu,  7 Nov 2024 10:35:06 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-50166: fsl/fman: Fix refcount handling of fman-related devices

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

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

fsl/fman: Fix refcount handling of fman-related devices

In mac_probe() there are multiple calls to of_find_device_by_node(),
fman_bind() and fman_port_bind() which takes references to of_dev->dev.
Not all references taken by these calls are released later on error path
in mac_probe() and in mac_remove() which lead to reference leaks.

Add references release.

The Linux kernel CVE team has assigned CVE-2024-50166 to this issue.


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

	Issue introduced in 4.5 with commit 3933961682a3 and fixed in 6.6.59 with commit 5ed4334fc951
	Issue introduced in 4.5 with commit 3933961682a3 and fixed in 6.11.6 with commit 3c2a3619d565
	Issue introduced in 4.5 with commit 3933961682a3 and fixed in 6.12-rc5 with commit 1dec67e0d9fb

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-2024-50166
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/net/ethernet/freescale/fman/mac.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/5ed4334fc9512f934fe2ae9c4cf7f8142e451b8b
	https://git.kernel.org/stable/c/3c2a3619d565fe16bf59b0a047bab103a2ee4490
	https://git.kernel.org/stable/c/1dec67e0d9fbb087c2ab17bf1bd17208231c3bb1