ghsa-48f7-49jv-jj2v
Vulnerability from github
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.
{
"affected": [],
"aliases": [
"CVE-2025-22124"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-04-16T15:16:06Z",
"severity": null
},
"details": "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.",
"id": "GHSA-48f7-49jv-jj2v",
"modified": "2025-04-16T15:34:45Z",
"published": "2025-04-16T15:34:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22124"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6130825f34d41718c98a9b1504a79a23e379701e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bc3a9788961631359527763d7e1fcf26554c7cb1"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
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