CVE-2023-53183 (GCVE-0-2023-53183)
Vulnerability from cvelistv5
Published
2025-09-15 14:04
Modified
2025-09-15 14:04
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: exit gracefully if reloc roots don't match [BUG] Syzbot reported a crash that an ASSERT() got triggered inside prepare_to_merge(). [CAUSE] The root cause of the triggered ASSERT() is we can have a race between quota tree creation and relocation. This leads us to create a duplicated quota tree in the btrfs_read_fs_root() path, and since it's treated as fs tree, it would have ROOT_SHAREABLE flag, causing us to create a reloc tree for it. The bug itself is fixed by a dedicated patch for it, but this already taught us the ASSERT() is not something straightforward for developers. [ENHANCEMENT] Instead of using an ASSERT(), let's handle it gracefully and output extra info about the mismatch reloc roots to help debug. Also with the above ASSERT() removed, we can trigger ASSERT(0)s inside merge_reloc_roots() later. Also replace those ASSERT(0)s with WARN_ON()s.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/05d7ce504545f7874529701664c90814ca645c5d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/69dd147de419b04d1d8d2ca67ef424cddd5b8fd5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9d04716e36654275aea00fb93fc9b30b850925e7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a96b6519ac71583835cb46d74bc450de5a13877f
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/relocation.c"
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          "vendor": "Linux",
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          "vendor": "Linux",
          "versions": [
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              "version": "5.15.127",
              "versionType": "semver"
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              "versionType": "semver"
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              "version": "6.4.11",
              "versionType": "semver"
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              "versionType": "original_commit_for_fix"
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        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: exit gracefully if reloc roots don\u0027t match\n\n[BUG]\nSyzbot reported a crash that an ASSERT() got triggered inside\nprepare_to_merge().\n\n[CAUSE]\nThe root cause of the triggered ASSERT() is we can have a race between\nquota tree creation and relocation.\n\nThis leads us to create a duplicated quota tree in the\nbtrfs_read_fs_root() path, and since it\u0027s treated as fs tree, it would\nhave ROOT_SHAREABLE flag, causing us to create a reloc tree for it.\n\nThe bug itself is fixed by a dedicated patch for it, but this already\ntaught us the ASSERT() is not something straightforward for\ndevelopers.\n\n[ENHANCEMENT]\nInstead of using an ASSERT(), let\u0027s handle it gracefully and output\nextra info about the mismatch reloc roots to help debug.\n\nAlso with the above ASSERT() removed, we can trigger ASSERT(0)s inside\nmerge_reloc_roots() later.\nAlso replace those ASSERT(0)s with WARN_ON()s."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-15T14:04:35.399Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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        },
        {
          "url": "https://git.kernel.org/stable/c/05d7ce504545f7874529701664c90814ca645c5d"
        }
      ],
      "title": "btrfs: exit gracefully if reloc roots don\u0027t match",
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        "engine": "bippy-1.2.0"
      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53183",
    "datePublished": "2025-09-15T14:04:35.399Z",
    "dateReserved": "2025-09-15T13:59:19.065Z",
    "dateUpdated": "2025-09-15T14:04:35.399Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53183\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-15T14:15:40.420\",\"lastModified\":\"2025-09-15T15:22:27.090\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbtrfs: exit gracefully if reloc roots don\u0027t match\\n\\n[BUG]\\nSyzbot reported a crash that an ASSERT() got triggered inside\\nprepare_to_merge().\\n\\n[CAUSE]\\nThe root cause of the triggered ASSERT() is we can have a race between\\nquota tree creation and relocation.\\n\\nThis leads us to create a duplicated quota tree in the\\nbtrfs_read_fs_root() path, and since it\u0027s treated as fs tree, it would\\nhave ROOT_SHAREABLE flag, causing us to create a reloc tree for it.\\n\\nThe bug itself is fixed by a dedicated patch for it, but this already\\ntaught us the ASSERT() is not something straightforward for\\ndevelopers.\\n\\n[ENHANCEMENT]\\nInstead of using an ASSERT(), let\u0027s handle it gracefully and output\\nextra info about the mismatch reloc roots to help debug.\\n\\nAlso with the above ASSERT() removed, we can trigger ASSERT(0)s inside\\nmerge_reloc_roots() later.\\nAlso replace those ASSERT(0)s with WARN_ON()s.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/05d7ce504545f7874529701664c90814ca645c5d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/69dd147de419b04d1d8d2ca67ef424cddd5b8fd5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9d04716e36654275aea00fb93fc9b30b850925e7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a96b6519ac71583835cb46d74bc450de5a13877f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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