In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
zram: fix slot lock bit position on big-endian 64-bit<\/p>\n
The slot lock is a bit operation on the whole __lock word, which flags and
\nac_time alias as two u32s. On little-endian the lock bit lands in the
\nposition ZRAM_ENTRY_LOCK reserves in flags, so the aliasing works out. On
\n64-bit big-endian it lands in ac_time instead: with
\nZRAM_TRACK_ENTRY_ACTIME enabled, storing the access time from
\nmark_slot_accessed() or slot_free() wipes out the held lock bit, letting
\nanother CPU take the same slot lock; an access time value with that bit
\nset makes the slot look locked forever.<\/p>\n
Shift the lock bit into the flags half of the word on big-endian 64-bit.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
zram: fix slot lock bit position on big-endian 64-bit<\/p>\n
The slot lock is a bit operation on the whole __lock word, which flags and
\na<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-24731","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/24731","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=24731"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24731"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24731"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}