In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
mm\/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug<\/p>\n
We miss a failed allocation check for pgdat->per_cpu_nodestats, which
\nresults in a NULL deref when we offset into the per-cpu area.<\/p>\n
Propagate -ENOMEM up the stack and leave per_cpu_nodestats pointing
\nat boot_nodestats so a later online can retry the allocation.<\/p>\n
hotadd_init_pgdat() returns NULL on failure, which __try_online_node()
\nalready maps to -ENOMEM.<\/p>\n
On failure nothing needs to be unwound:
\n – the node is never marked online
\n – per_cpu_nodestats is left pointing at boot_nodestats
\n – __add_memory_resource() cleans up pending memblock resources
\n – later online attempts retry the per_cpu_nodestats allocation<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
mm\/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug<\/p>\n
We miss a failed allocation check for pgdat->per_cpu_nodest<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-26029","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/26029","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=26029"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=26029"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=26029"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}