thermal: intel_powerclamp: Use get_cpu() instead of smp_processor_id() to avoid crash

{
  "id": "efa8f29084fce6e8cdad64080b4b39a3681679187edba2768f06ffe88dc6d838",
  "url": "https://osv.dev/vulnerability/CVE-2022-50494",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "thermal: intel_powerclamp: Use get_cpu() instead of smp_processor_id() to avoid crash",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: thermal: intel_powerclamp: Use get_cpu() instead of smp_processor_id() to avoid crash When CPU 0 is offline and intel_powerclamp is used to inject idle, it generates kernel BUG: BUG: using smp_processor_id() in preemptible [00000000] code: bash/15687 caller is debug_smp_processor_id+0x17/0x20 CPU: 4 PID: 15687 Comm: bash Not tainted 5.19.0-rc7+ #57 Call Trace: dump_stack_lvl+0x49/0x63 dump_stack+0x10/0x16 check_preemption_disabled+0xdd/0xe0 debug_smp_processor_id+0x17/0x20 powerclamp_set_cur_state+0x7f/0xf9 [intel_powerclamp] ... ... Here CPU 0 is the control CPU by default and changed to the current CPU, if CPU 0 offlined. This check has to be performed under cpus_read_lock(), hence the above warning. Use get_cpu() instead of smp_processor_id() to avoid this BUG. [ rjw: Subject edits ]",
    "evidence": "osv:CVE-2022-50494",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
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        "prerequisites": [],
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            "value": "5.19.17",
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          {
            "value": "6.0.3",
            "evidence": "/affected/1/ranges"
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        "affected_versions": []
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    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-50494",
      "aliases": [
        "CVE-2022-50494"
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      ],
      "modified": "2026-10-28T02:30:22.876845508Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0f91f66c568b316b19cb042cf50584467b3bdff4",
        "https://git.kernel.org/stable/c/3e799e815097febbcb81b472285be824f5d089f9",
        "https://git.kernel.org/stable/c/418fae0700e85a498062424f8656435c32cdb200",
        "https://git.kernel.org/stable/c/513943bf879d45005213e6f5cfb7d9e9943f589f",
        "https://git.kernel.org/stable/c/5614908434451aafbf9b24cb5247cf1d21269f76",
        "https://git.kernel.org/stable/c/5a646c38f648185ee2c62f2a19da3c6f04e27612",
        "https://git.kernel.org/stable/c/68b99e94a4a2db6ba9b31fe0485e057b9354a640",
        "https://git.kernel.org/stable/c/6904727db0eb62fb0c2dce1cf331c341d97ee4b7",
        "https://git.kernel.org/stable/c/6e2a347b304224b2aeb1c0ea000d1cf8a02cc592",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50494.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50494",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50494.json"
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        "value": "CVE-2022-50494",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 488945,
  "published_at": "2025-10-04T15:43:46.562+00:00"
}