linux-cve-announce - CVE-2024-56773: kunit: Fix potential null dereference in kunit_device_driver

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Message-ID: <2025010811-CVE-2024-56773-46a8@gregkh>
Date: Wed,  8 Jan 2025 18:49:11 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-56773: kunit: Fix potential null dereference in kunit_device_driver_test()

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

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

kunit: Fix potential null dereference in kunit_device_driver_test()

kunit_kzalloc() may return a NULL pointer, dereferencing it without
NULL check may lead to NULL dereference.
Add a NULL check for test_state.

The Linux kernel CVE team has assigned CVE-2024-56773 to this issue.


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

	Issue introduced in 6.8 with commit d03c720e03bd9bf0b784d80b5d3ede7e2daf3b6e and fixed in 6.12.4 with commit 5d28fac59369b5d3c48cdf09e50275a61ff91202
	Issue introduced in 6.8 with commit d03c720e03bd9bf0b784d80b5d3ede7e2daf3b6e and fixed in 6.13-rc1 with commit 435c20eed572a95709b1536ff78832836b2f91b1

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-2024-56773
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:
	lib/kunit/kunit-test.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/5d28fac59369b5d3c48cdf09e50275a61ff91202
	https://git.kernel.org/stable/c/435c20eed572a95709b1536ff78832836b2f91b1