linux-cve-announce - CVE-2022-50023: dmaengine: dw-axi-dmac: ignore interrupt if no descriptor

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Message-ID: <2025061836-CVE-2022-50023-1d2a@gregkh>
Date: Wed, 18 Jun 2025 13:01:28 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-50023: dmaengine: dw-axi-dmac: ignore interrupt if no descriptor

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

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

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

dmaengine: dw-axi-dmac: ignore interrupt if no descriptor

If the channel has no descriptor and the interrupt is raised then the
kernel will OOPS. Check the result of vchan_next_desc() in the handler
axi_chan_block_xfer_complete() to avoid the error happening.

The Linux kernel CVE team has assigned CVE-2022-50023 to this issue.


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

	Fixed in 5.15.63 with commit 54aa6c49361b79f7f6b15fc63dfe9ea52c70bb03
	Fixed in 5.19.4 with commit 3d05aeebbde8c69593d8aa512b7c08b8f0ad25ba
	Fixed in 6.0 with commit 820f5ce999d2f99961e88c16d65cd26764df0590

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-2022-50023
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/54aa6c49361b79f7f6b15fc63dfe9ea52c70bb03
	https://git.kernel.org/stable/c/3d05aeebbde8c69593d8aa512b7c08b8f0ad25ba
	https://git.kernel.org/stable/c/820f5ce999d2f99961e88c16d65cd26764df0590