block: fix q->blkg_list corruption during disk rebind

{
  "id": "4df866e476679080e22b3ecd28ff51ecd076ebbbcad6cfb1105e051d1336df6c",
  "url": "https://osv.dev/vulnerability/CVE-2024-35974",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "block: fix q->blkg_list corruption during disk rebind",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: block: fix q->blkg_list corruption during disk rebind Multiple gendisk instances can allocated/added for single request queue in case of disk rebind. blkg may still stay in q->blkg_list when calling blkcg_init_disk() for rebind, then q->blkg_list becomes corrupted. Fix the list corruption issue by: - add blkg_init_queue() to initialize q->blkg_list & q->blkcg_mutex only - move calling blkg_init_queue() into blk_alloc_queue() The list corruption should be started since commit f1c006f1c685 (\"blk-cgroup: synchronize pd_free_fn() from blkg_free_workfn() and blkcg_deactivate_policy()\") which delays removing blkg from q->blkg_list into blkg_free_workfn().",
    "evidence": "osv:CVE-2024-35974",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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    "severity": "unknown",
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      "aliases": [
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      ],
      "modified": "2026-10-28T02:30:26.353031250Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/083b58373463a6e5ee60ecb135269348f68ad7df",
        "https://git.kernel.org/stable/c/740ffad95ca8033bd6e080ed337655b13b4d38ac",
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        "https://git.kernel.org/stable/c/8b8ace080319a866f5dfe9da8e665ae51d971c54",
        "https://git.kernel.org/stable/c/b5dae1cd0d8368b4338430ff93403df67f0b8bcc",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/35xxx/CVE-2024-35974.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-35974",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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        "value": "CVE-2024-35974",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 492722,
  "published_at": "2024-05-20T09:42:01.114+00:00"
}