linux-cve-announce - CVE-2022-50024: dmaengine: dw-axi-dmac: do not print NULL LLI during error

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Message-ID: <2025061836-CVE-2022-50024-d57b@gregkh>
Date: Wed, 18 Jun 2025 13:01:29 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-50024: dmaengine: dw-axi-dmac: do not print NULL LLI during error

From: Greg Kroah-Hartman <gregkh@...nel.org>

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

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

dmaengine: dw-axi-dmac: do not print NULL LLI during error

During debugging we have seen an issue where axi_chan_dump_lli()
is passed a NULL LLI pointer which ends up causing an OOPS due
to trying to get fields from it. Simply print NULL LLI and exit
to avoid this.

The Linux kernel CVE team has assigned CVE-2022-50024 to this issue.


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

	Fixed in 5.15.63 with commit af76e6fdcf92f1a742b788d0dba5edd194267bf9
	Fixed in 5.19.4 with commit ad764df73ae5eada265fffc0408404703cbb2b8d
	Fixed in 6.0 with commit 86cb0defe0e275453bc39e856bb523eb425a6537

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-2022-50024
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/dma/dw-axi-dmac/dw-axi-dmac-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/af76e6fdcf92f1a742b788d0dba5edd194267bf9
	https://git.kernel.org/stable/c/ad764df73ae5eada265fffc0408404703cbb2b8d
	https://git.kernel.org/stable/c/86cb0defe0e275453bc39e856bb523eb425a6537