CVE-2025-38521 (GCVE-0-2025-38521)
Vulnerability from cvelistv5
Published
2025-08-16 10:55
Modified
2025-08-16 10:55
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/imagination: Fix kernel crash when hard resetting the GPU The GPU hard reset sequence calls pm_runtime_force_suspend() and pm_runtime_force_resume(), which according to their documentation should only be used during system-wide PM transitions to sleep states. The main issue though is that depending on some internal runtime PM state as seen by pm_runtime_force_suspend() (whether the usage count is <= 1), pm_runtime_force_resume() might not resume the device unless needed. If that happens, the runtime PM resume callback pvr_power_device_resume() is not called, the GPU clocks are not re-enabled, and the kernel crashes on the next attempt to access GPU registers as part of the power-on sequence. Replace calls to pm_runtime_force_suspend() and pm_runtime_force_resume() with direct calls to the driver's runtime PM callbacks, pvr_power_device_suspend() and pvr_power_device_resume(), to ensure clocks are re-enabled and avoid the kernel crash.
References
Impacted products
Vendor Product Version
Linux Linux Version: cc1aeedb98ad347c06ff59e991b2f94dfb4c565d
Version: cc1aeedb98ad347c06ff59e991b2f94dfb4c565d
Version: cc1aeedb98ad347c06ff59e991b2f94dfb4c565d
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{
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/imagination/pvr_power.c"
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          "vendor": "Linux",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/imagination: Fix kernel crash when hard resetting the GPU\n\nThe GPU hard reset sequence calls pm_runtime_force_suspend() and\npm_runtime_force_resume(), which according to their documentation should\nonly be used during system-wide PM transitions to sleep states.\n\nThe main issue though is that depending on some internal runtime PM\nstate as seen by pm_runtime_force_suspend() (whether the usage count is\n\u003c= 1), pm_runtime_force_resume() might not resume the device unless\nneeded. If that happens, the runtime PM resume callback\npvr_power_device_resume() is not called, the GPU clocks are not\nre-enabled, and the kernel crashes on the next attempt to access GPU\nregisters as part of the power-on sequence.\n\nReplace calls to pm_runtime_force_suspend() and\npm_runtime_force_resume() with direct calls to the driver\u0027s runtime PM\ncallbacks, pvr_power_device_suspend() and pvr_power_device_resume(),\nto ensure clocks are re-enabled and avoid the kernel crash."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-16T10:55:08.373Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/9f852d301f642223c4798f3c13ba15e91165d078"
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        {
          "url": "https://git.kernel.org/stable/c/d38376b3ee48d073c64e75e150510d7e6b4b04f7"
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      ],
      "title": "drm/imagination: Fix kernel crash when hard resetting the GPU",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38521",
    "datePublished": "2025-08-16T10:55:08.373Z",
    "dateReserved": "2025-04-16T04:51:24.023Z",
    "dateUpdated": "2025-08-16T10:55:08.373Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38521\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-08-16T11:15:45.413\",\"lastModified\":\"2025-08-16T11:15:45.413\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/imagination: Fix kernel crash when hard resetting the GPU\\n\\nThe GPU hard reset sequence calls pm_runtime_force_suspend() and\\npm_runtime_force_resume(), which according to their documentation should\\nonly be used during system-wide PM transitions to sleep states.\\n\\nThe main issue though is that depending on some internal runtime PM\\nstate as seen by pm_runtime_force_suspend() (whether the usage count is\\n\u003c= 1), pm_runtime_force_resume() might not resume the device unless\\nneeded. If that happens, the runtime PM resume callback\\npvr_power_device_resume() is not called, the GPU clocks are not\\nre-enabled, and the kernel crashes on the next attempt to access GPU\\nregisters as part of the power-on sequence.\\n\\nReplace calls to pm_runtime_force_suspend() and\\npm_runtime_force_resume() with direct calls to the driver\u0027s runtime PM\\ncallbacks, pvr_power_device_suspend() and pvr_power_device_resume(),\\nto ensure clocks are re-enabled and avoid the kernel crash.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/9f852d301f642223c4798f3c13ba15e91165d078\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d38376b3ee48d073c64e75e150510d7e6b4b04f7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e066cc6e0f094ca2120f1928d126d56f686cd73e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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