linux-cve-announce - CVE-2024-43860: remoteproc: imx_rproc: Skip over memory region when node value is NULL

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Message-ID: <2024081734-CVE-2024-43860-d72f@gregkh>
Date: Sat, 17 Aug 2024 11:24:37 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-43860: remoteproc: imx_rproc: Skip over memory region when node value is NULL

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

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

remoteproc: imx_rproc: Skip over memory region when node value is NULL

In imx_rproc_addr_init() "nph = of_count_phandle_with_args()" just counts
number of phandles. But phandles may be empty. So of_parse_phandle() in
the parsing loop (0 < a < nph) may return NULL which is later dereferenced.
Adjust this issue by adding NULL-return check.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

[Fixed title to fit within the prescribed 70-75 charcters]

The Linux kernel CVE team has assigned CVE-2024-43860 to this issue.


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

	Issue introduced in 4.14 with commit a0ff4aa6f010 and fixed in 6.1.103 with commit 9a17cf8b2ce4
	Issue introduced in 4.14 with commit a0ff4aa6f010 and fixed in 6.6.44 with commit 6c9ea3547fad
	Issue introduced in 4.14 with commit a0ff4aa6f010 and fixed in 6.10.3 with commit c877a5f5268d
	Issue introduced in 4.14 with commit a0ff4aa6f010 and fixed in 6.11-rc1 with commit 2fa26ca8b786

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-2024-43860
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/remoteproc/imx_rproc.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/9a17cf8b2ce483fa75258bc2cdcf628f24bcf5f8
	https://git.kernel.org/stable/c/6c9ea3547fad252fe9ae5d3ed7e066e2085bf3a2
	https://git.kernel.org/stable/c/c877a5f5268d4ab8224b9c9fbce3d746e4e72bc9
	https://git.kernel.org/stable/c/2fa26ca8b786888673689ccc9da6094150939982