refscale: Fix uninitalized use of wait_queue_head_t

{
  "id": "db39f5f3e900152deb3cc10c62c94ef09a94e57a48e25fb81d9c7970c0f84778",
  "url": "https://osv.dev/vulnerability/CVE-2023-54316",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "refscale: Fix uninitalized use of wait_queue_head_t",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: refscale: Fix uninitalized use of wait_queue_head_t Running the refscale test occasionally crashes the kernel with the following error: [ 8569.952896] BUG: unable to handle page fault for address: ffffffffffffffe8 [ 8569.952900] #PF: supervisor read access in kernel mode [ 8569.952902] #PF: error_code(0x0000) - not-present page [ 8569.952904] PGD c4b048067 P4D c4b049067 PUD c4b04b067 PMD 0 [ 8569.952910] Oops: 0000 [#1] PREEMPT_RT SMP NOPTI [ 8569.952916] Hardware name: Dell Inc. PowerEdge R750/0WMWCR, BIOS 1.2.4 05/28/2021 [ 8569.952917] RIP: 0010:prepare_to_wait_event+0x101/0x190 : [ 8569.952940] Call Trace: [ 8569.952941] [ 8569.952944] ref_scale_reader+0x380/0x4a0 [refscale] [ 8569.952959] kthread+0x10e/0x130 [ 8569.952966] ret_from_fork+0x1f/0x30 [ 8569.952973] The likely cause is that init_waitqueue_head() is called after the call to the torture_create_kthread() function that creates the ref_scale_reader kthread. Although this init_waitqueue_head() call will very likely complete before this kthread is created and starts running, it is possible that the calling kthread will be delayed between the calls to torture_create_kthread() and init_waitqueue_head(). In this case, the new kthread will use the waitqueue head before it is properly initialized, which is not good for the kernel's health and well-being. The above crash happened here: static inline void __add_wait_queue(...) { : if (!(wq->flags & WQ_FLAG",
    "evidence": "osv:CVE-2023-54316",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.195",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.132",
            "evidence": "/affected/1/ranges"
          },
          {
            "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-2023-54316",
      "aliases": [
        "CVE-2023-54316"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "653ed64b01dc5989f8f579d0038e987476c2c023"
                },
                {
                  "fixed": "066fbd8bc981cf49923bf828b7b4092894df577f"
                },
                {
                  "fixed": "ec9d118ad99dc6f1bc674c1e649c25533d89b9ba"
                },
                {
                  "fixed": "e0322a255a2242dbe4686b6176b3c83dea490529"
                },
                {
                  "fixed": "e5de968a9032366198720eac4f368ed7e690b3ef"
                },
                {
                  "fixed": "70a2856fd1d0a040c876ba9e3f89b949ae92e4dd"
                },
                {
                  "fixed": "f5063e8948dad7f31adb007284a5d5038ae31bb8"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-54316.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.9.0"
                },
                {
                  "fixed": "5.10.195"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.132"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "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-2023-54316.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.443446482Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/066fbd8bc981cf49923bf828b7b4092894df577f",
        "https://git.kernel.org/stable/c/70a2856fd1d0a040c876ba9e3f89b949ae92e4dd",
        "https://git.kernel.org/stable/c/e0322a255a2242dbe4686b6176b3c83dea490529",
        "https://git.kernel.org/stable/c/e5de968a9032366198720eac4f368ed7e690b3ef",
        "https://git.kernel.org/stable/c/ec9d118ad99dc6f1bc674c1e649c25533d89b9ba",
        "https://git.kernel.org/stable/c/f5063e8948dad7f31adb007284a5d5038ae31bb8",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54316.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-54316",
        "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/2023/54xxx/CVE-2023-54316.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-54316",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 492127,
  "published_at": "2025-12-30T12:23:46.526+00:00"
}