ghsa-rjr4-cj33-9qjx
Vulnerability from github
Published
2024-07-29 18:30
Modified
2024-07-29 18:30
Details

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

ASoC: mediatek: mt8195: Add platform entry for ETDM1_OUT_BE dai link

Commit e70b8dd26711 ("ASoC: mediatek: mt8195: Remove afe-dai component and rework codec link") removed the codec entry for the ETDM1_OUT_BE dai link entirely instead of replacing it with COMP_EMPTY(). This worked by accident as the remaining COMP_EMPTY() platform entry became the codec entry, and the platform entry became completely empty, effectively the same as COMP_DUMMY() since snd_soc_fill_dummy_dai() doesn't do anything for platform entries.

This causes a KASAN out-of-bounds warning in mtk_soundcard_common_probe() in sound/soc/mediatek/common/mtk-soundcard-driver.c:

for_each_card_prelinks(card, i, dai_link) {
    if (adsp_node && !strncmp(dai_link->name, "AFE_SOF", strlen("AFE_SOF")))
        dai_link->platforms->of_node = adsp_node;
    else if (!dai_link->platforms->name && !dai_link->platforms->of_node)
        dai_link->platforms->of_node = platform_node;
}

where the code expects the platforms array to have space for at least one entry.

Add an COMP_EMPTY() entry so that dai_link->platforms has space.

Show details on source website

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{
   affected: [],
   aliases: [
      "CVE-2024-42088",
   ],
   database_specific: {
      cwe_ids: [],
      github_reviewed: false,
      github_reviewed_at: null,
      nvd_published_at: "2024-07-29T17:15:11Z",
      severity: null,
   },
   details: "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: mediatek: mt8195: Add platform entry for ETDM1_OUT_BE dai link\n\nCommit e70b8dd26711 (\"ASoC: mediatek: mt8195: Remove afe-dai component\nand rework codec link\") removed the codec entry for the ETDM1_OUT_BE\ndai link entirely instead of replacing it with COMP_EMPTY(). This worked\nby accident as the remaining COMP_EMPTY() platform entry became the codec\nentry, and the platform entry became completely empty, effectively the\nsame as COMP_DUMMY() since snd_soc_fill_dummy_dai() doesn't do anything\nfor platform entries.\n\nThis causes a KASAN out-of-bounds warning in mtk_soundcard_common_probe()\nin sound/soc/mediatek/common/mtk-soundcard-driver.c:\n\n\tfor_each_card_prelinks(card, i, dai_link) {\n\t\tif (adsp_node && !strncmp(dai_link->name, \"AFE_SOF\", strlen(\"AFE_SOF\")))\n\t\t\tdai_link->platforms->of_node = adsp_node;\n\t\telse if (!dai_link->platforms->name && !dai_link->platforms->of_node)\n\t\t\tdai_link->platforms->of_node = platform_node;\n\t}\n\nwhere the code expects the platforms array to have space for at least one entry.\n\nAdd an COMP_EMPTY() entry so that dai_link->platforms has space.",
   id: "GHSA-rjr4-cj33-9qjx",
   modified: "2024-07-29T18:30:42Z",
   published: "2024-07-29T18:30:42Z",
   references: [
      {
         type: "ADVISORY",
         url: "https://nvd.nist.gov/vuln/detail/CVE-2024-42088",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/282a4482e198e03781c152c88aac8aa382ef9a55",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/42b9ab7a4d7e6c5efd71847541e4fcc213585aad",
      },
   ],
   schema_version: "1.4.0",
   severity: [],
}


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