In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
kho: fix size calculation in kho_preserved_memory_reserve()<\/p>\n
kho_preserved_memory_reserve() calculates the size of a preservation by
\ndoing 1 << (order + PAGE_SHIFT). Since the '1' is a 32-bit integer, it
\ncan only be shifted by 31. That is, it will only work for preservations
\nup to 2 GiB. Larger preservations will trigger undefined behaviour.<\/p>\n
While preservations larger than 2 GiB can't be obtained via folios
\ncurrently, they can be obtained via kho_preserve_pages().<\/p>\n
For example, memblock reserve_mem uses kho_preserve_pages().
\nReservations larger than 2 GiB are valid and will trigger this bug if
\nproperly aligned.<\/p>\n
Fix it by using 1UL for shifting.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
kho: fix size calculation in kho_preserved_memory_reserve()<\/p>\n
kho_preserved_memory_reserve() calculates the size of a preservation b<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21490","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21490","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=21490"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21490"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21490"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}