linux-cve-announce - CVE-2022-49184: net: sparx5: switchdev: fix possible NULL pointer dereference

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Message-ID: <2025022615-CVE-2022-49184-4de2@gregkh>
Date: Wed, 26 Feb 2025 02:56:29 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49184: net: sparx5: switchdev: fix possible NULL pointer dereference

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

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

net: sparx5: switchdev: fix possible NULL pointer dereference

As the possible failure of the allocation, devm_kzalloc() may return NULL
pointer.
Therefore, it should be better to check the 'db' in order to prevent
the dereference of NULL pointer.

The Linux kernel CVE team has assigned CVE-2022-49184 to this issue.


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

	Issue introduced in 5.15 with commit 10615907e9b51c9ae92f3a6ecabd01c482f20f32 and fixed in 5.15.33 with commit b375ea083fa649092cd016ac1f89a2d1fd8f8e8b
	Issue introduced in 5.15 with commit 10615907e9b51c9ae92f3a6ecabd01c482f20f32 and fixed in 5.16.19 with commit c346791877e6ce923bb21e34b30c6f99326aa5a8
	Issue introduced in 5.15 with commit 10615907e9b51c9ae92f3a6ecabd01c482f20f32 and fixed in 5.17.2 with commit e7e1fff76c4c57688dc7d53a3b6212182d5628d0
	Issue introduced in 5.15 with commit 10615907e9b51c9ae92f3a6ecabd01c482f20f32 and fixed in 5.18 with commit 0906f3a3df07835e37077d8971aac65347f2ed57

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-2022-49184
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/microchip/sparx5/sparx5_fdma.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/b375ea083fa649092cd016ac1f89a2d1fd8f8e8b
	https://git.kernel.org/stable/c/c346791877e6ce923bb21e34b30c6f99326aa5a8
	https://git.kernel.org/stable/c/e7e1fff76c4c57688dc7d53a3b6212182d5628d0
	https://git.kernel.org/stable/c/0906f3a3df07835e37077d8971aac65347f2ed57