GHSA-93Q3-24JJ-X39C
Vulnerability from github – Published: 2024-05-01 15:30 – Updated: 2025-09-18 15:30In the Linux kernel, the following vulnerability has been resolved:
md: Fix missing release of 'active_io' for flush
submit_flushes atomic_set(&mddev->flush_pending, 1); rdev_for_each_rcu(rdev, mddev) atomic_inc(&mddev->flush_pending); bi->bi_end_io = md_end_flush submit_bio(bi); / flush io is done first / md_end_flush if (atomic_dec_and_test(&mddev->flush_pending)) percpu_ref_put(&mddev->active_io) -> active_io is not released
if (atomic_dec_and_test(&mddev->flush_pending)) -> missing release of active_io
For consequence, mddev_suspend() will wait for 'active_io' to be zero forever.
Fix this problem by releasing 'active_io' in submit_flushes() if 'flush_pending' is decreased to zero.
{
"affected": [],
"aliases": [
"CVE-2024-27023"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-01T13:15:48Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd: Fix missing release of \u0027active_io\u0027 for flush\n\nsubmit_flushes\n atomic_set(\u0026mddev-\u003eflush_pending, 1);\n rdev_for_each_rcu(rdev, mddev)\n atomic_inc(\u0026mddev-\u003eflush_pending);\n bi-\u003ebi_end_io = md_end_flush\n submit_bio(bi);\n /* flush io is done first */\n md_end_flush\n if (atomic_dec_and_test(\u0026mddev-\u003eflush_pending))\n percpu_ref_put(\u0026mddev-\u003eactive_io)\n -\u003e active_io is not released\n\n if (atomic_dec_and_test(\u0026mddev-\u003eflush_pending))\n -\u003e missing release of active_io\n\nFor consequence, mddev_suspend() will wait for \u0027active_io\u0027 to be zero\nforever.\n\nFix this problem by releasing \u0027active_io\u0027 in submit_flushes() if\n\u0027flush_pending\u0027 is decreased to zero.",
"id": "GHSA-93q3-24jj-x39c",
"modified": "2025-09-18T15:30:21Z",
"published": "2024-05-01T15:30:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-27023"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/02dad157ba11064d073f5499dc33552b227d5d3a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/11f81438927f84edfaaeb5d5f10856c3a1c1fc82"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6b2ff10390b19a2364af622b6666b690443f9f3f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/855678ed8534518e2b428bcbcec695de9ba248e8"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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