linux-cve-announce - CVE-2024-57800: ALSA: memalloc: prefer dma_mapping

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Message-ID: <2025011152-CVE-2024-57800-699a@gregkh>
Date: Sat, 11 Jan 2025 13:39:55 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-57800: ALSA: memalloc: prefer dma_mapping_error() over explicit address checking

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

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

ALSA: memalloc: prefer dma_mapping_error() over explicit address checking

With CONFIG_DMA_API_DEBUG enabled, the following warning is observed:

DMA-API: snd_hda_intel 0000:03:00.1: device driver failed to check map error[device address=0x00000000ffff0000] [size=20480 bytes] [mapped as single]
WARNING: CPU: 28 PID: 2255 at kernel/dma/debug.c:1036 check_unmap+0x1408/0x2430
CPU: 28 UID: 42 PID: 2255 Comm: wireplumber Tainted: G  W L  6.12.0-10-133577cad6bf48e5a7848c4338124081393bfe8a+ #759
debug_dma_unmap_page+0xe9/0xf0
snd_dma_wc_free+0x85/0x130 [snd_pcm]
snd_pcm_lib_free_pages+0x1e3/0x440 [snd_pcm]
snd_pcm_common_ioctl+0x1c9a/0x2960 [snd_pcm]
snd_pcm_ioctl+0x6a/0xc0 [snd_pcm]
...

Check for returned DMA addresses using specialized dma_mapping_error()
helper which is generally recommended for this purpose by
Documentation/core-api/dma-api.rst.

The Linux kernel CVE team has assigned CVE-2024-57800 to this issue.

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

	Issue introduced in 6.12 with commit c880a5146642e9d35f88aaa353ae98ffd4fc3f99 and fixed in 6.12.8 with commit c180c3f42d340e8dcb9094bb8ea7d477d37081a8
	Issue introduced in 6.12 with commit c880a5146642e9d35f88aaa353ae98ffd4fc3f99 and fixed in 6.13-rc5 with commit fa0308134d26dbbeb209a1581eea46df663866b6

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-2024-57800
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:
	sound/core/memalloc.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/c180c3f42d340e8dcb9094bb8ea7d477d37081a8
	https://git.kernel.org/stable/c/fa0308134d26dbbeb209a1581eea46df663866b6