ghsa-9m45-9636-5jr3
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
Revert "readahead: properly shorten readahead when falling back to do_page_cache_ra()"
This reverts commit 7c877586da3178974a8a94577b6045a48377ff25.
Anders and Philippe have reported that recent kernels occasionally hang when used with NFS in readahead code. The problem has been bisected to 7c877586da3 ("readahead: properly shorten readahead when falling back to do_page_cache_ra()"). The cause of the problem is that ra->size can be shrunk by read_pages() call and subsequently we end up calling do_page_cache_ra() with negative (read huge positive) number of pages. Let's revert 7c877586da3 for now until we can find a proper way how the logic in read_pages() and page_cache_ra_order() can coexist. This can lead to reduced readahead throughput due to readahead window confusion but that's better than outright hangs.
{
"affected": [],
"aliases": [
"CVE-2024-57839"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-01-11T15:15:07Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"readahead: properly shorten readahead when falling back to do_page_cache_ra()\"\n\nThis reverts commit 7c877586da3178974a8a94577b6045a48377ff25.\n\nAnders and Philippe have reported that recent kernels occasionally hang\nwhen used with NFS in readahead code. The problem has been bisected to\n7c877586da3 (\"readahead: properly shorten readahead when falling back to\ndo_page_cache_ra()\"). The cause of the problem is that ra-\u003esize can be\nshrunk by read_pages() call and subsequently we end up calling\ndo_page_cache_ra() with negative (read huge positive) number of pages. \nLet\u0027s revert 7c877586da3 for now until we can find a proper way how the\nlogic in read_pages() and page_cache_ra_order() can coexist. This can\nlead to reduced readahead throughput due to readahead window confusion but\nthat\u0027s better than outright hangs.",
"id": "GHSA-9m45-9636-5jr3",
"modified": "2025-01-11T15:30:29Z",
"published": "2025-01-11T15:30:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-57839"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/85351e4941a253e4c50fb7048bfc19b60b4ec44b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a220d6b95b1ae12c7626283d7609f0a1438e6437"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
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