null_blk: fix validation of block size

{
  "id": "0b0fac7fa261c498f09e3ec4fe759cf051449e2284f7195da43699e437454999",
  "url": "https://osv.dev/vulnerability/CVE-2024-41077",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "null_blk: fix validation of block size",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: null_blk: fix validation of block size Block size should be between 512 and PAGE_SIZE and be a power of 2. The current check does not validate this, so update the check. Without this patch, null_blk would Oops due to a null pointer deref when loaded with bs=1536 [1]. [axboe: remove unnecessary braces and != 0 check]",
    "evidence": "osv:CVE-2024-41077",
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      "modified": "2026-10-28T02:30:30.722726459Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/08f03186b96e25e3154916a2e70732557c770ea7",
        "https://git.kernel.org/stable/c/2772ed2fc075eef7df3789906fc9dae01e4e132e",
        "https://git.kernel.org/stable/c/9625afe1dd4a158a14bb50f81af9e2dac634c0b1",
        "https://git.kernel.org/stable/c/9b873bdaae64bddade9d8c6df23c8a31948d47d0",
        "https://git.kernel.org/stable/c/c462ecd659b5fce731f1d592285832fd6ad54053",
        "https://git.kernel.org/stable/c/f92409a9da02f27d05d713bff5f865e386cef9b3",
        "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/41xxx/CVE-2024-41077.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-41077",
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    "security_relevant": true,
    "severity_evidence": null
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  "source_id": "core-osv",
  "document_id": 497442,
  "published_at": "2024-07-29T14:57:36.68+00:00"
}