fkie_cve-2024-56568
Vulnerability from fkie_nvd
Published
2024-12-27 15:15
Modified
2025-02-03 15:19
Severity ?
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: iommu/arm-smmu: Defer probe of clients after smmu device bound Null pointer dereference occurs due to a race between smmu driver probe and client driver probe, when of_dma_configure() for client is called after the iommu_device_register() for smmu driver probe has executed but before the driver_bound() for smmu driver has been called. Following is how the race occurs: T1:Smmu device probe T2: Client device probe really_probe() arm_smmu_device_probe() iommu_device_register() really_probe() platform_dma_configure() of_dma_configure() of_dma_configure_id() of_iommu_configure() iommu_probe_device() iommu_init_device() arm_smmu_probe_device() arm_smmu_get_by_fwnode() driver_find_device_by_fwnode() driver_find_device() next_device() klist_next() /* null ptr assigned to smmu */ /* null ptr dereference while smmu->streamid_mask */ driver_bound() klist_add_tail() When this null smmu pointer is dereferenced later in arm_smmu_probe_device, the device crashes. Fix this by deferring the probe of the client device until the smmu device has bound to the arm smmu driver. [will: Add comment]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/229e6ee43d2a160a1592b83aad620d6027084aadPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4a9485918a042e3114890dfbe19839a1897f8b2cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5018696b19bc6c021e934a8a59f4b1dd8c0ac9f8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c2527d07c7e9cda2c6165d5edccf74752baac1b0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dc02407ea952e20c544a078a6be2e6f008327973Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f8f794f387ad21c4696e5cd0626cb6f8a5f6aea5Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/arm-smmu: Defer probe of clients after smmu device bound\n\nNull pointer dereference occurs due to a race between smmu\ndriver probe and client driver probe, when of_dma_configure()\nfor client is called after the iommu_device_register() for smmu driver\nprobe has executed but before the driver_bound() for smmu driver\nhas been called.\n\nFollowing is how the race occurs:\n\nT1:Smmu device probe\t\tT2: Client device probe\n\nreally_probe()\narm_smmu_device_probe()\niommu_device_register()\n\t\t\t\t\treally_probe()\n\t\t\t\t\tplatform_dma_configure()\n\t\t\t\t\tof_dma_configure()\n\t\t\t\t\tof_dma_configure_id()\n\t\t\t\t\tof_iommu_configure()\n\t\t\t\t\tiommu_probe_device()\n\t\t\t\t\tiommu_init_device()\n\t\t\t\t\tarm_smmu_probe_device()\n\t\t\t\t\tarm_smmu_get_by_fwnode()\n\t\t\t\t\t\tdriver_find_device_by_fwnode()\n\t\t\t\t\t\tdriver_find_device()\n\t\t\t\t\t\tnext_device()\n\t\t\t\t\t\tklist_next()\n\t\t\t\t\t\t    /* null ptr\n\t\t\t\t\t\t       assigned to smmu */\n\t\t\t\t\t/* null ptr dereference\n\t\t\t\t\t   while smmu-\u003estreamid_mask */\ndriver_bound()\n\tklist_add_tail()\n\nWhen this null smmu pointer is dereferenced later in\narm_smmu_probe_device, the device crashes.\n\nFix this by deferring the probe of the client device\nuntil the smmu device has bound to the arm smmu driver.\n\n[will: Add comment]"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iommu/arm-smmu: Aplazar la sonda de los clientes despu\u00e9s del l\u00edmite del dispositivo smmu. Se produce una desreferencia de puntero nulo debido a una ejecuci\u00f3n entre la sonda del controlador smmu y la sonda del controlador del cliente, cuando se llama a of_dma_configure() para el cliente despu\u00e9s de que se haya ejecutado la sonda iommu_device_register() para el controlador smmu pero antes de que se haya llamado a driver_bound() para el controlador smmu. A continuaci\u00f3n se muestra c\u00f3mo se produce la ejecuci\u00f3n: T1: sonda de dispositivo Smmu T2: sonda de dispositivo cliente really_probe() arm_smmu_device_probe() iommu_device_register() really_probe() platform_dma_configure() of_dma_configure() of_dma_configure_id() of_iommu_configure() iommu_probe_device() iommu_init_device() arm_smmu_probe_device() arm_smmu_get_by_fwnode() driver_find_device_by_fwnode() driver_find_device() next_device() klist_next() /* puntero nulo asignado a smmu */ /* desreferencia de puntero nulo mientras smmu-\u0026gt;streamid_mask */ driver_bound() klist_add_tail() Cuando este puntero smmu nulo se desreferencia m\u00e1s adelante arm_smmu_probe_device, el dispositivo falla. Para solucionar este problema, postergue la prueba del dispositivo cliente hasta que el dispositivo smmu se haya vinculado al controlador smmu de arm. [will: Agregar comentario]"
    }
  ],
  "id": "CVE-2024-56568",
  "lastModified": "2025-02-03T15:19:41.107",
  "metrics": {
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          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2024-12-27T15:15:15.733",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-362"
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          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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  ]
}


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