cve-2024-40917
Vulnerability from cvelistv5
Published
2024-07-12 12:25
Modified
2025-01-17 13:26
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: memblock: make memblock_set_node() also warn about use of MAX_NUMNODES On an (old) x86 system with SRAT just covering space above 4Gb: ACPI: SRAT: Node 0 PXM 0 [mem 0x100000000-0xfffffffff] hotplug the commit referenced below leads to this NUMA configuration no longer being refused by a CONFIG_NUMA=y kernel (previously NUMA: nodes only cover 6144MB of your 8185MB e820 RAM. Not used. No NUMA configuration found Faking a node at [mem 0x0000000000000000-0x000000027fffffff] was seen in the log directly after the message quoted above), because of memblock_validate_numa_coverage() checking for NUMA_NO_NODE (only). This in turn led to memblock_alloc_range_nid()'s warning about MAX_NUMNODES triggering, followed by a NULL deref in memmap_init() when trying to access node 64's (NODE_SHIFT=6) node data. To compensate said change, make memblock_set_node() warn on and adjust a passed in value of MAX_NUMNODES, just like various other functions already do.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/22f742b8f738918f683198a18ec3c691acda14c4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4ddb7f966f3d06fcf1ba5ee298af6714b593584b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e0eec24e2e199873f43df99ec39773ad3af2bff7
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/22f742b8f738918f683198a18ec3c691acda14c4
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e0eec24e2e199873f43df99ec39773ad3af2bff7
Impacted products
Vendor Product Version
Linux Linux Version: 6fdc770506eb8379bf68a49d4e193c8364ac64e0
Version: ff6c3d81f2e86b63a3a530683f89ef393882782a
Version: ff6c3d81f2e86b63a3a530683f89ef393882782a
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   Linux Linux Version: 6.8
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