CVE-2022-50721 (GCVE-0-2022-50721)

Vulnerability from cvelistv5 – Published: 2025-12-24 12:22 – Updated: 2026-05-11 19:24
VLAI
Title
dmaengine: qcom-adm: fix wrong calling convention for prep_slave_sg
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5c9f8c2dbdbe53818bcde6aa6695e1331e5f841f , < 5653bd0200944e5803fa8e32dc36aa49931312f9 (git)
Affected: 5c9f8c2dbdbe53818bcde6aa6695e1331e5f841f , < 9a041174c58a226e713f6cebd41eccec7a5cfa72 (git)
Affected: 5c9f8c2dbdbe53818bcde6aa6695e1331e5f841f , < b9d2140c3badf4107973ad77c5a0ec3075705c85 (git)
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Linux Linux Affected: 5.11
Unaffected: 0 , < 5.11 (semver)
Unaffected: 5.19.17 , ≤ 5.19.* (semver)
Unaffected: 6.0.3 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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{
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          "programFiles": [
            "drivers/dma/qcom/qcom_adm.c"
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          "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."
        }
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        {
          "url": "https://git.kernel.org/stable/c/b9d2140c3badf4107973ad77c5a0ec3075705c85"
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    "datePublished": "2025-12-24T12:22:44.080Z",
    "dateReserved": "2025-12-24T12:20:40.329Z",
    "dateUpdated": "2026-05-11T19:24:13.986Z",
    "state": "PUBLISHED"
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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."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndmaengine: qcom-adm: corregir convenci\u00f3n de llamada incorrecta para prep_slave_sg\n\nLa convenci\u00f3n de llamada para pre_slave_sg es devolver NULL en caso de error y proporcionar un registro de error al sistema. Qcom-adm en su lugar proporciona un puntero de error cuando ocurre un error. Esto causa indirectamente un p\u00e1nico del kernel, por ejemplo, para el controlador nandc que solo verifica si el puntero devuelto por device_prep_slave_sg no es NULL. Devolver un puntero de error hace que nandc piense que la funci\u00f3n device_prep_slave_sg se complet\u00f3 correctamente y provoca p\u00e1nicos del kernel m\u00e1s tarde en el c\u00f3digo.\n\nSi bien nandc es el que provoca el fallo del kernel, se se\u00f1al\u00f3 que el problema real es que qcom-adm no sigue la convenci\u00f3n de llamada para esa funci\u00f3n.\n\nPara solucionar esto, se debe dejar de devolver un puntero de error y devolver NULL con un registro de error."
          }
        ],
        "id": "CVE-2022-50721",
        "lastModified": "2026-11-10T12:10:00.177",
        "metrics": {},
        "published": "2025-12-24T13:15:58.767",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
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      "aggregate_severity": "Moderate",
      "current_release_date": "2026-11-05T10:25:02+00:00",
      "cve": "CVE-2022-50721",
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      "product_status:known_affected": "109",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: dmaengine: qcom-adm: fix wrong calling convention for prep_slave_sg",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50721.json",
      "version": "3"
    }
  }
}



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