fkie_cve-2023-53337
Vulnerability from fkie_nvd
Published
2025-09-17 15:15
Modified
2025-09-18 13:43
Severity ?
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/13f73ef77baa4764dc1ca4fcbae9cade05b83866
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/28a65b49eb53e172d23567005465019658bfdb4d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4005cec6847c06ee191583270b7cdd7e696543cc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4569a292a84e340e97d178898ad1cfe1a3080a61
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/55f7810632f993cff622a0ddbc7c865892294b61
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7c3e662048053802f6b0db3a78e97f4e1f7edc4f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a73201c607d8e506358d60aafddda4246bdd9350
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bd89073fc7a5d03b1d06b372addbe405e5a925f4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e9c5412c5972124776c1b873533eb39e287a4dfa
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: do not write dirty data after degenerating to read-only\n\nAccording to syzbot\u0027s report, mark_buffer_dirty() called from\nnilfs_segctor_do_construct() outputs a warning with some patterns after\nnilfs2 detects metadata corruption and degrades to read-only mode.\n\nAfter such read-only degeneration, page cache data may be cleared through\nnilfs_clear_dirty_page() which may also clear the uptodate flag for their\nbuffer heads.  However, even after the degeneration, log writes are still\nperformed by unmount processing etc., which causes mark_buffer_dirty() to\nbe called for buffer heads without the \"uptodate\" flag and causes the\nwarning.\n\nSince any writes should not be done to a read-only file system in the\nfirst place, this fixes the warning in mark_buffer_dirty() by letting\nnilfs_segctor_do_construct() abort early if in read-only mode.\n\nThis also changes the retry check of nilfs_segctor_write_out() to avoid\nunnecessary log write retries if it detects -EROFS that\nnilfs_segctor_do_construct() returned."
    }
  ],
  "id": "CVE-2023-53337",
  "lastModified": "2025-09-18T13:43:34.310",
  "metrics": {},
  "published": "2025-09-17T15:15:36.793",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/13f73ef77baa4764dc1ca4fcbae9cade05b83866"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/28a65b49eb53e172d23567005465019658bfdb4d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4005cec6847c06ee191583270b7cdd7e696543cc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4569a292a84e340e97d178898ad1cfe1a3080a61"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/55f7810632f993cff622a0ddbc7c865892294b61"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7c3e662048053802f6b0db3a78e97f4e1f7edc4f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a73201c607d8e506358d60aafddda4246bdd9350"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bd89073fc7a5d03b1d06b372addbe405e5a925f4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e9c5412c5972124776c1b873533eb39e287a4dfa"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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