In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
ksmbd: detach blocked lock requests before freeing<\/p>\n
A file_lock retained by ksmbd for byte-range lock bookkeeping can still
\nbe part of the VFS blocked-request graph. In particular, the VFS can
\nchain a new waiter below an already blocked request through
\nflc_blocked_requests. The ksmbd_file reference count does not cover that
\ngraph.<\/p>\n
Both __ksmbd_close_fd() and the cross-request unlock path free these
\nretained file_lock objects directly. If a dependent waiter is still
\nattached, locks_release_private() hits
\nBUG_ON(!list_empty(&flc->flc_blocked_requests)). The same lifetime
\nmismatch can leave a freed ksmbd_lock reachable through its request-local
\nllist.<\/p>\n
Detach the file_lock from the blocked-request graph before freeing it in
\nthe close, cross-request unlock, and rollback paths. locks_delete_block()
\nalso wakes requests chained below the object. Remove llist when a
\ncompleted lock is published so a globally visible ksmbd_lock no longer
\npoints into the submitting worker’s stack.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
ksmbd: detach blocked lock requests before freeing<\/p>\n
A file_lock retained by ksmbd for byte-range lock bookkeeping can still
\nbe part<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25564","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25564","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=25564"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25564"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25564"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}