CVE-2024-57839 (GCVE-0-2024-57839)
Vulnerability from cvelistv5
Published
2025-01-11 14:30
Modified
2025-05-04 10:05
Severity ?
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 7c877586da3178974a8a94577b6045a48377ff25
Version: 7c877586da3178974a8a94577b6045a48377ff25
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          "programFiles": [
            "mm/readahead.c"
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          "value": "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."
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    "cveId": "CVE-2024-57839",
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    "dateReserved": "2025-01-11T12:34:02.622Z",
    "dateUpdated": "2025-05-04T10:05:21.323Z",
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