nilfs2: do not write dirty data after degenerating to read-only

{
  "id": "fce1a4a68db969b2d9fb3fc45f00beda74e83c8a593312fabc4cd24462661afe",
  "url": "https://osv.dev/vulnerability/CVE-2023-53337",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "nilfs2: do not write dirty data after degenerating to read-only",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: nilfs2: do not write dirty data after degenerating to read-only According to syzbot's report, mark_buffer_dirty() called from nilfs_segctor_do_construct() outputs a warning with some patterns after nilfs2 detects metadata corruption and degrades to read-only mode. After such read-only degeneration, page cache data may be cleared through nilfs_clear_dirty_page() which may also clear the uptodate flag for their buffer heads. However, even after the degeneration, log writes are still performed by unmount processing etc., which causes mark_buffer_dirty() to be called for buffer heads without the \"uptodate\" flag and causes the warning. Since any writes should not be done to a read-only file system in the first place, this fixes the warning in mark_buffer_dirty() by letting nilfs_segctor_do_construct() abort early if in read-only mode. This also changes the retry check of nilfs_segctor_write_out() to avoid unnecessary log write retries if it detects -EROFS that nilfs_segctor_do_construct() returned.",
    "evidence": "osv:CVE-2023-53337",
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        "prerequisites": [],
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      "modified": "2026-10-28T02:30:46.796854600Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/13f73ef77baa4764dc1ca4fcbae9cade05b83866",
        "https://git.kernel.org/stable/c/28a65b49eb53e172d23567005465019658bfdb4d",
        "https://git.kernel.org/stable/c/4005cec6847c06ee191583270b7cdd7e696543cc",
        "https://git.kernel.org/stable/c/4569a292a84e340e97d178898ad1cfe1a3080a61",
        "https://git.kernel.org/stable/c/55f7810632f993cff622a0ddbc7c865892294b61",
        "https://git.kernel.org/stable/c/7c3e662048053802f6b0db3a78e97f4e1f7edc4f",
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        "https://git.kernel.org/stable/c/e9c5412c5972124776c1b873533eb39e287a4dfa",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53337.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-53337",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53337.json"
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    "severity_evidence": "/severity/0/score"
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  "source_id": "core-osv",
  "document_id": 514433,
  "published_at": "2025-09-17T14:56:31.582+00:00"
}