Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: mm/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug We miss a failed allocation check for pgdat->per_cpu_nodestats, which results in a NULL deref when we offset into the per-cpu area. Propagate -ENOMEM up the stack and leave per_cpu_nodestats pointing at boot_nodestats so a later online can retry the allocation. hotadd_init_pgdat() returns NULL on failure, which __try_online_node() already maps to -ENOMEM. On failure nothing needs to be unwound: - the node is never marked online - per_cpu_nodestats is left pointing at boot_nodestats - __add_memory_resource() cleans up pending memblock resources - later online attempts retry the per_cpu_nodestats allocation
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 75ef7184053989118d3814c558a9af62e7376a58 before 4dda09e7ca0bf0c3fa7c5c8f134d9804b67f455c; affected 75ef7184053989118d3814c558a9af62e7376a58 before 4cc5caef9a8d1894dfa31d84a0daa0ac1437dadc; affected 75ef7184053989118d3814c558a9af62e7376a58 before bc3b5e6519b8df22d622a03eab6772784da97db4; affected 75ef7184053989118d3814c558a9af62e7376a58 before 1017fe1c7f48e511c5a680e3057005daaff2f3a2; affected 75ef7184053989118d3814c558a9af62e7376a58 before 2ebce860bdd7ae5e13002811bc9bbbf33fcfc221 |
| Linux / Linux | affected 4.8; unaffected 0 before 4.8; unaffected 6.6.160 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/4dda09e7ca0bf0c3fa7c5c8f134d9804b67f455c
- https://git.kernel.org/stable/c/4cc5caef9a8d1894dfa31d84a0daa0ac1437dadc
- https://git.kernel.org/stable/c/bc3b5e6519b8df22d622a03eab6772784da97db4
- https://git.kernel.org/stable/c/1017fe1c7f48e511c5a680e3057005daaff2f3a2
- https://git.kernel.org/stable/c/2ebce860bdd7ae5e13002811bc9bbbf33fcfc221