clk: bcm: rpi: Assign ->num before accessing ->hws

{
  "id": "8d6fcbb8e01b6e69cff4804ffd1c47af1dc0aa8e94bae9af0025363cd661ef9b",
  "url": "https://osv.dev/vulnerability/CVE-2024-39461",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "clk: bcm: rpi: Assign ->num before accessing ->hws",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: clk: bcm: rpi: Assign ->num before accessing ->hws Commit f316cdff8d67 (\"clk: Annotate struct clk_hw_onecell_data with __counted_by\") annotated the hws member of 'struct clk_hw_onecell_data' with __counted_by, which informs the bounds sanitizer about the number of elements in hws, so that it can warn when hws is accessed out of bounds. As noted in that change, the __counted_by member must be initialized with the number of elements before the first array access happens, otherwise there will be a warning from each access prior to the initialization because the number of elements is zero. This occurs in raspberrypi_discover_clocks() due to ->num being assigned after ->hws has been accessed: UBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-raspberrypi.c:374:4 index 3 is out of range for type 'struct clk_hw *[] __counted_by(num)' (aka 'struct clk_hw *[]') Move the ->num initialization to before the first access of ->hws, which clears up the warning.",
    "evidence": "osv:CVE-2024-39461",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.34",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.9.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2024-39461",
      "aliases": [
        "CVE-2024-39461"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "f316cdff8d677db9ad9c90acb44c4cd535b0ee27"
                },
                {
                  "fixed": "9562dbe5cdbb16ac887d27ef6f179980bb99193c"
                },
                {
                  "fixed": "cdf9c7871d58d3df59d2775982e3533adb8ec920"
                },
                {
                  "fixed": "6dc445c1905096b2ed4db1a84570375b4e00cc0f"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-39461.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.6.0"
                },
                {
                  "fixed": "6.6.34"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.9.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-39461.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.536728187Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/6dc445c1905096b2ed4db1a84570375b4e00cc0f",
        "https://git.kernel.org/stable/c/9562dbe5cdbb16ac887d27ef6f179980bb99193c",
        "https://git.kernel.org/stable/c/cdf9c7871d58d3df59d2775982e3533adb8ec920",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39461.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-39461",
        "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/2024/39xxx/CVE-2024-39461.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-39461",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 521058,
  "published_at": "2024-06-25T14:25:01.453+00:00"
}