ghsa-8mjp-767h-9569
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
fs/proc: fix softlockup in __read_vmcore (part 2)
Since commit 5cbcb62dddf5 ("fs/proc: fix softlockup in __read_vmcore") the number of softlockups in __read_vmcore at kdump time have gone down, but they still happen sometimes.
In a memory constrained environment like the kdump image, a softlockup is not just a harmless message, but it can interfere with things like RCU freeing memory, causing the crashdump to get stuck.
The second loop in __read_vmcore has a lot more opportunities for natural sleep points, like scheduling out while waiting for a data write to happen, but apparently that is not always enough.
Add a cond_resched() to the second loop in __read_vmcore to (hopefully) get rid of the softlockups.
{
"affected": [],
"aliases": [
"CVE-2025-21694"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-12T14:15:32Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/proc: fix softlockup in __read_vmcore (part 2)\n\nSince commit 5cbcb62dddf5 (\"fs/proc: fix softlockup in __read_vmcore\") the\nnumber of softlockups in __read_vmcore at kdump time have gone down, but\nthey still happen sometimes.\n\nIn a memory constrained environment like the kdump image, a softlockup is\nnot just a harmless message, but it can interfere with things like RCU\nfreeing memory, causing the crashdump to get stuck.\n\nThe second loop in __read_vmcore has a lot more opportunities for natural\nsleep points, like scheduling out while waiting for a data write to\nhappen, but apparently that is not always enough.\n\nAdd a cond_resched() to the second loop in __read_vmcore to (hopefully)\nget rid of the softlockups.",
"id": "GHSA-8mjp-767h-9569",
"modified": "2025-02-14T18:30:49Z",
"published": "2025-02-12T15:31:59Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21694"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/649b266606bc413407ce315f710c8ce8a88ee30a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/65c367bd9d4f43513c7f837df5753bea9561b836"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/80828540dad0757b6337c6561d49c81038f38d87"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/80da29deb88a3a907441fc35bb7bac309f31e713"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/84c4ed15626574c9ac6c1039ba9c137a77bcc7f2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a5a2ee8144c3897d37403a69118c3e3dc5713958"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cbc5dde0a461240046e8a41c43d7c3b76d5db952"
}
],
"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"
}
]
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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