fkie_cve-2022-50766
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: btrfs: set generation before calling btrfs_clean_tree_block in btrfs_init_new_buffer syzbot is reporting uninit-value in btrfs_clean_tree_block() [1], for commit bc877d285ca3dba2 ("btrfs: Deduplicate extent_buffer init code") missed that btrfs_set_header_generation() in btrfs_init_new_buffer() must not be moved to after clean_tree_block() because clean_tree_block() is calling btrfs_header_generation() since commit 55c69072d6bd5be1 ("Btrfs: Fix extent_buffer usage when nodesize != leafsize"). Since memzero_extent_buffer() will reset "struct btrfs_header" part, we can't move btrfs_set_header_generation() to before memzero_extent_buffer(). Just re-add btrfs_set_header_generation() before btrfs_clean_tree_block().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0a408c6212c16b9a2a1141d3c531247582ef8101
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/89bc41c92d10b905c60f6ec13c9ef664a3555c54
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a687c2890fe4a2acaac6941fa4097a1264d8f3eb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cbddcc4fa3443fe8cfb2ff8e210deb1f6a0eea38
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: set generation before calling btrfs_clean_tree_block in btrfs_init_new_buffer\n\nsyzbot is reporting uninit-value in btrfs_clean_tree_block() [1], for\ncommit bc877d285ca3dba2 (\"btrfs: Deduplicate extent_buffer init code\")\nmissed that btrfs_set_header_generation() in btrfs_init_new_buffer() must\nnot be moved to after clean_tree_block() because clean_tree_block() is\ncalling btrfs_header_generation() since commit 55c69072d6bd5be1 (\"Btrfs:\nFix extent_buffer usage when nodesize != leafsize\").\n\nSince memzero_extent_buffer() will reset \"struct btrfs_header\" part, we\ncan\u0027t move btrfs_set_header_generation() to before memzero_extent_buffer().\nJust re-add btrfs_set_header_generation() before btrfs_clean_tree_block()."
    }
  ],
  "id": "CVE-2022-50766",
  "lastModified": "2025-12-24T13:16:03.400",
  "metrics": {},
  "published": "2025-12-24T13:16:03.400",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0a408c6212c16b9a2a1141d3c531247582ef8101"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/89bc41c92d10b905c60f6ec13c9ef664a3555c54"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a687c2890fe4a2acaac6941fa4097a1264d8f3eb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cbddcc4fa3443fe8cfb2ff8e210deb1f6a0eea38"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.