CVE-2025-22124 (GCVE-0-2025-22124)

Vulnerability from cvelistv5 – Published: 2025-04-16 14:13 – Updated: 2025-09-09 17:05
VLAI?
Title
md/md-bitmap: fix wrong bitmap_limit for clustermd when write sb
Summary
In the Linux kernel, the following vulnerability has been resolved: md/md-bitmap: fix wrong bitmap_limit for clustermd when write sb In clustermd, separate write-intent-bitmaps are used for each cluster node: 0 4k 8k 12k ------------------------------------------------------------------- | idle | md super | bm super [0] + bits | | bm bits[0, contd] | bm super[1] + bits | bm bits[1, contd] | | bm super[2] + bits | bm bits [2, contd] | bm super[3] + bits | | bm bits [3, contd] | | | So in node 1, pg_index in __write_sb_page() could equal to bitmap->storage.file_pages. Then bitmap_limit will be calculated to 0. md_super_write() will be called with 0 size. That means the first 4k sb area of node 1 will never be updated through filemap_write_page(). This bug causes hang of mdadm/clustermd_tests/01r1_Grow_resize. Here use (pg_index % bitmap->storage.file_pages) to make calculation of bitmap_limit correct.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: ab99a87542f194f28e2364a42afbf9fb48b1c724 , < 60196f92bbc7901eb5cfa5d456651b87ea50a4a3 (git)
Affected: ab99a87542f194f28e2364a42afbf9fb48b1c724 , < bc3a9788961631359527763d7e1fcf26554c7cb1 (git)
Affected: ab99a87542f194f28e2364a42afbf9fb48b1c724 , < 6130825f34d41718c98a9b1504a79a23e379701e (git)
Affected: 655cc01889fa9b65441922565cddee64af49e6d6 (git)
Affected: 5600d6013c634c2b6b6c6c55c8ecb50c3a6211f2 (git)
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    Linux Linux Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.12.46 , ≤ 6.12.* (semver)
Unaffected: 6.14.2 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
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{
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/md-bitmap.c"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/md-bitmap: fix wrong bitmap_limit for clustermd when write sb\n\nIn clustermd, separate write-intent-bitmaps are used for each cluster\nnode:\n\n0                    4k                     8k                    12k\n-------------------------------------------------------------------\n| idle                | md super            | bm super [0] + bits |\n| bm bits[0, contd]   | bm super[1] + bits  | bm bits[1, contd]   |\n| bm super[2] + bits  | bm bits [2, contd]  | bm super[3] + bits  |\n| bm bits [3, contd]  |                     |                     |\n\nSo in node 1, pg_index in __write_sb_page() could equal to\nbitmap-\u003estorage.file_pages. Then bitmap_limit will be calculated to\n0. md_super_write() will be called with 0 size.\nThat means the first 4k sb area of node 1 will never be updated\nthrough filemap_write_page().\nThis bug causes hang of mdadm/clustermd_tests/01r1_Grow_resize.\n\nHere use (pg_index % bitmap-\u003estorage.file_pages) to make calculation\nof bitmap_limit correct."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-09T17:05:52.349Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        },
        {
          "url": "https://git.kernel.org/stable/c/6130825f34d41718c98a9b1504a79a23e379701e"
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      ],
      "title": "md/md-bitmap: fix wrong bitmap_limit for clustermd when write sb",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-22124",
    "datePublished": "2025-04-16T14:13:08.134Z",
    "dateReserved": "2024-12-29T08:45:45.823Z",
    "dateUpdated": "2025-09-09T17:05:52.349Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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