fkie_cve-2023-54140
Vulnerability from fkie_nvd
Published
2025-12-24 13:16
Modified
2025-12-24 13:16
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix WARNING in mark_buffer_dirty due to discarded buffer reuse A syzbot stress test using a corrupted disk image reported that mark_buffer_dirty() called from __nilfs_mark_inode_dirty() or nilfs_palloc_commit_alloc_entry() may output a kernel warning, and can panic if the kernel is booted with panic_on_warn. This is because nilfs2 keeps buffer pointers in local structures for some metadata and reuses them, but such buffers may be forcibly discarded by nilfs_clear_dirty_page() in some critical situations. This issue is reported to appear after commit 28a65b49eb53 ("nilfs2: do not write dirty data after degenerating to read-only"), but the issue has potentially existed before. Fix this issue by checking the uptodate flag when attempting to reuse an internally held buffer, and reloading the metadata instead of reusing the buffer if the flag was lost.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/46c11be2dca295742a5508ea910a77f7733fb7f4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/473795610594f261e98920f0945550314df36f07
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4da07e958bfda2d69d83db105780e8916e3ac02e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/99a73016a5e12a09586a96f998e91f9ea145cd00
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b308b3eabc429649b5501d36290cea403fbd746c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b911bef132a06de01a745c6a24172d6db7216333
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cdaac8e7e5a059f9b5e816cda257f08d0abffacd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d95e403588738c7ec38f52b9f490b15e7745d393
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f1d637b63d8a27ac3386f186a694907f2717fc13
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix WARNING in mark_buffer_dirty due to discarded buffer reuse\n\nA syzbot stress test using a corrupted disk image reported that\nmark_buffer_dirty() called from __nilfs_mark_inode_dirty() or\nnilfs_palloc_commit_alloc_entry() may output a kernel warning, and can\npanic if the kernel is booted with panic_on_warn.\n\nThis is because nilfs2 keeps buffer pointers in local structures for some\nmetadata and reuses them, but such buffers may be forcibly discarded by\nnilfs_clear_dirty_page() in some critical situations.\n\nThis issue is reported to appear after commit 28a65b49eb53 (\"nilfs2: do\nnot write dirty data after degenerating to read-only\"), but the issue has\npotentially existed before.\n\nFix this issue by checking the uptodate flag when attempting to reuse an\ninternally held buffer, and reloading the metadata instead of reusing the\nbuffer if the flag was lost."
    }
  ],
  "id": "CVE-2023-54140",
  "lastModified": "2025-12-24T13:16:15.997",
  "metrics": {},
  "published": "2025-12-24T13:16:15.997",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/46c11be2dca295742a5508ea910a77f7733fb7f4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/473795610594f261e98920f0945550314df36f07"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4da07e958bfda2d69d83db105780e8916e3ac02e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/99a73016a5e12a09586a96f998e91f9ea145cd00"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b308b3eabc429649b5501d36290cea403fbd746c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b911bef132a06de01a745c6a24172d6db7216333"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cdaac8e7e5a059f9b5e816cda257f08d0abffacd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d95e403588738c7ec38f52b9f490b15e7745d393"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f1d637b63d8a27ac3386f186a694907f2717fc13"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


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