btrfs: remove BUG() after failure to insert delayed dir index item

{
  "id": "8c7667abb3d585c0f73e187b3ca4f4a38afe5c48896e0c5702cbb974e53f00fb",
  "url": "https://osv.dev/vulnerability/CVE-2023-52569",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "btrfs: remove BUG() after failure to insert delayed dir index item",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: btrfs: remove BUG() after failure to insert delayed dir index item Instead of calling BUG() when we fail to insert a delayed dir index item into the delayed node's tree, we can just release all the resources we have allocated/acquired before and return the error to the caller. This is fine because all existing call chains undo anything they have done before calling btrfs_insert_delayed_dir_index() or BUG_ON (when creating pending snapshots in the transaction commit path). So remove the BUG() call and do proper error handling. This relates to a syzbot report linked below, but does not fix it because it only prevents hitting a BUG(), it does not fix the issue where somehow we attempt to use twice the same index number for different index items.",
    "evidence": "osv:CVE-2023-52569",
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        "name": {
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    "severity": "unknown",
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      "modified": "2026-10-28T02:30:29.940289858Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2c58c3931ede7cd08cbecf1f1a4acaf0a04a41a9",
        "https://git.kernel.org/stable/c/39c4a9522db0072570d602e9b365119e17fb9f4f",
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        "https://nvd.nist.gov/vuln/detail/CVE-2023-52569",
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        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": null
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  "source_id": "core-osv",
  "document_id": 496512,
  "published_at": "2024-03-02T21:59:40.081+00:00"
}