cpufreq: amd-pstate-ut: Fix kernel panic when loading the driver

{
  "id": "c7d43ae37c43b56d43137f3ca8f96445b0a67b793a374be20b2cc5cc0d96085c",
  "url": "https://osv.dev/vulnerability/CVE-2023-53563",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "cpufreq: amd-pstate-ut: Fix kernel panic when loading the driver",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: cpufreq: amd-pstate-ut: Fix kernel panic when loading the driver After loading the amd-pstate-ut driver, amd_pstate_ut_check_perf() and amd_pstate_ut_check_freq() use cpufreq_cpu_get() to get the policy of the CPU and mark it as busy. In these functions, cpufreq_cpu_put() should be used to release the policy, but it is not, so any other entity trying to access the policy is blocked indefinitely. One such scenario is when amd_pstate mode is changed, leading to the following splat: [ 1332.103727] INFO: task bash:2929 blocked for more than 120 seconds. [ 1332.110001] Not tainted 6.5.0-rc2-amd-pstate-ut #5 [ 1332.115315] \"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message. [ 1332.123140] task:bash state:D stack:0 pid:2929 ppid:2873 flags:0x00004006 [ 1332.123143] Call Trace: [ 1332.123145] [ 1332.123148] __schedule+0x3c1/0x16a0 [ 1332.123154] ? _raw_read_lock_irqsave+0x2d/0x70 [ 1332.123157] schedule+0x6f/0x110 [ 1332.123160] schedule_timeout+0x14f/0x160 [ 1332.123162] ? preempt_count_add+0x86/0xd0 [ 1332.123165] __wait_for_common+0x92/0x190 [ 1332.123168] ? __pfx_schedule_timeout+0x10/0x10 [ 1332.123170] wait_for_completion+0x28/0x30 [ 1332.123173] cpufreq_policy_put_kobj+0x4d/0x90 [ 1332.123177] cpufreq_policy_free+0x157/0x1d0 [ 1332.123178] ? preempt_count_add+0x58/0xd0 [ 1332.123180] cpufreq_remove_dev+0xb6/0x100 [ 1332.123182] subsys_interface_unregister+0x114/0x120 [ 1332.123185] ? pree",
    "evidence": "osv:CVE-2023-53563",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.53",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.4.16",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.5.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2023-53563",
      "aliases": [
        "CVE-2023-53563"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "14eb1c96e3a3fd9cd377ac9af3c7a410f8bf1015"
                },
                {
                  "fixed": "fcf78a17bbb94bebaa912f0460a1848f7d374c94"
                },
                {
                  "fixed": "84857640c67405eed258c461b3ef909002f1e201"
                },
                {
                  "fixed": "0f74f12ee042fd72e45f0e8700e063c84ef3883b"
                },
                {
                  "fixed": "60dd283804479c4a52f995b713f448e2cd65b8c8"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53563.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.1.0"
                },
                {
                  "fixed": "6.1.53"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.4.16"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.5.0"
                },
                {
                  "fixed": "6.5.3"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53563.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.072694453Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0f74f12ee042fd72e45f0e8700e063c84ef3883b",
        "https://git.kernel.org/stable/c/60dd283804479c4a52f995b713f448e2cd65b8c8",
        "https://git.kernel.org/stable/c/84857640c67405eed258c461b3ef909002f1e201",
        "https://git.kernel.org/stable/c/fcf78a17bbb94bebaa912f0460a1848f7d374c94",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53563.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-53563",
        "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/2023/53xxx/CVE-2023-53563.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-53563",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 490341,
  "published_at": "2025-10-04T15:17:06.34+00:00"
}