ocfs2: fix uninitialized value in ocfs2_file_read_iter()

{
  "id": "318e6b910baf6c7dea5c706e13703d2682ffcd620099c1510abe60e54f6ecc49",
  "url": "https://osv.dev/vulnerability/CVE-2024-53155",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ocfs2: fix uninitialized value in ocfs2_file_read_iter()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix uninitialized value in ocfs2_file_read_iter() Syzbot has reported the following KMSAN splat: BUG: KMSAN: uninit-value in ocfs2_file_read_iter+0x9a4/0xf80 ocfs2_file_read_iter+0x9a4/0xf80 __io_read+0x8d4/0x20f0 io_read+0x3e/0xf0 io_issue_sqe+0x42b/0x22c0 io_wq_submit_work+0xaf9/0xdc0 io_worker_handle_work+0xd13/0x2110 io_wq_worker+0x447/0x1410 ret_from_fork+0x6f/0x90 ret_from_fork_asm+0x1a/0x30 Uninit was created at: __alloc_pages_noprof+0x9a7/0xe00 alloc_pages_mpol_noprof+0x299/0x990 alloc_pages_noprof+0x1bf/0x1e0 allocate_slab+0x33a/0x1250 ___slab_alloc+0x12ef/0x35e0 kmem_cache_alloc_bulk_noprof+0x486/0x1330 __io_alloc_req_refill+0x84/0x560 io_submit_sqes+0x172f/0x2f30 __se_sys_io_uring_enter+0x406/0x41c0 __x64_sys_io_uring_enter+0x11f/0x1a0 x64_sys_call+0x2b54/0x3ba0 do_syscall_64+0xcd/0x1e0 entry_SYSCALL_64_after_hwframe+0x77/0x7f Since an instance of 'struct kiocb' may be passed from the block layer with 'private' field uninitialized, introduce 'ocfs2_iocb_init_rw_locked()' and use it from where 'ocfs2_dio_end_io()' might take care, i.e. in 'ocfs2_file_read_iter()' and 'ocfs2_file_write_iter()'.",
    "evidence": "osv:CVE-2024-53155",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.19.325",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.4.287",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.231",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.174",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.120",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.64",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.11.11",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2024-53155",
      "aliases": [
        "CVE-2024-53155"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"
        }
      ],
      "affected": [
        {
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              "type": "GIT",
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                  "fixed": "f4078ef38d3163e6be47403a619558b19c4bfccd"
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                {
                  "fixed": "66b7ddd1804e2c4216dd7ead8eeb746cdbb3b62f"
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                  "fixed": "8c966150d5abff58c3c2bdb9a6e63fd773782905"
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                {
                  "fixed": "83f8713a0ef1d55d6a287bcfadcaab8245ac5098"
                },
                {
                  "fixed": "8e0de82ed18ba0e71f817adbd81317fd1032ca5a"
                },
                {
                  "fixed": "366c933c2ab34dd6551acc03b4872726b7605143"
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                {
                  "fixed": "dc78efe556fed162d48736ef24066f42e463e27c"
                },
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                  "fixed": "adc77b19f62d7e80f98400b2fca9d700d2afdd6f"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-53155.json"
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        {
          "ranges": [
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              "type": "ECOSYSTEM",
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                  "introduced": "6.7.0"
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            {
              "type": "ECOSYSTEM",
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                  "introduced": "6.12.0"
                },
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-53155.json"
          }
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      ],
      "modified": "2026-10-28T02:30:40.307605777Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/366c933c2ab34dd6551acc03b4872726b7605143",
        "https://git.kernel.org/stable/c/66b7ddd1804e2c4216dd7ead8eeb746cdbb3b62f",
        "https://git.kernel.org/stable/c/6c8f8d1e595dabd5389817f6d798cc8bd95c40ab",
        "https://git.kernel.org/stable/c/83f8713a0ef1d55d6a287bcfadcaab8245ac5098",
        "https://git.kernel.org/stable/c/8c966150d5abff58c3c2bdb9a6e63fd773782905",
        "https://git.kernel.org/stable/c/8e0de82ed18ba0e71f817adbd81317fd1032ca5a",
        "https://git.kernel.org/stable/c/adc77b19f62d7e80f98400b2fca9d700d2afdd6f",
        "https://git.kernel.org/stable/c/dc78efe556fed162d48736ef24066f42e463e27c",
        "https://git.kernel.org/stable/c/f4078ef38d3163e6be47403a619558b19c4bfccd",
        "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html",
        "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/53xxx/CVE-2024-53155.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-53155",
        "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/2024/53xxx/CVE-2024-53155.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-53155",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 507862,
  "published_at": "2024-12-24T11:28:54.241+00:00"
}