FKIE_CVE-2022-50721

Vulnerability from fkie_nvd - Published: 2025-12-24 13:15 - Updated: 2025-12-24 13:15
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: dmaengine: qcom-adm: fix wrong calling convention for prep_slave_sg The calling convention for pre_slave_sg is to return NULL on error and provide an error log to the system. Qcom-adm instead provide error pointer when an error occur. This indirectly cause kernel panic for example for the nandc driver that checks only if the pointer returned by device_prep_slave_sg is not NULL. Returning an error pointer makes nandc think the device_prep_slave_sg function correctly completed and makes the kernel panics later in the code. While nandc is the one that makes the kernel crash, it was pointed out that the real problem is qcom-adm not following calling convention for that function. To fix this, drop returning error pointer and return NULL with an error log.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5653bd0200944e5803fa8e32dc36aa49931312f9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9a041174c58a226e713f6cebd41eccec7a5cfa72
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b9d2140c3badf4107973ad77c5a0ec3075705c85
Impacted products
Vendor Product Version
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: qcom-adm: fix wrong calling convention for prep_slave_sg\n\nThe calling convention for pre_slave_sg is to return NULL on error and\nprovide an error log to the system. Qcom-adm instead provide error\npointer when an error occur. This indirectly cause kernel panic for\nexample for the nandc driver that checks only if the pointer returned by\ndevice_prep_slave_sg is not NULL. Returning an error pointer makes nandc\nthink the device_prep_slave_sg function correctly completed and makes\nthe kernel panics later in the code.\n\nWhile nandc is the one that makes the kernel crash, it was pointed out\nthat the real problem is qcom-adm not following calling convention for\nthat function.\n\nTo fix this, drop returning error pointer and return NULL with an error\nlog."
    }
  ],
  "id": "CVE-2022-50721",
  "lastModified": "2025-12-24T13:15:58.767",
  "metrics": {},
  "published": "2025-12-24T13:15:58.767",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5653bd0200944e5803fa8e32dc36aa49931312f9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9a041174c58a226e713f6cebd41eccec7a5cfa72"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b9d2140c3badf4107973ad77c5a0ec3075705c85"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


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