CVE-2024-57800

/// Technical 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.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References