In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
netconsole: take target_cleanup_list_lock in drop_netconsole_target()<\/p>\n
drop_netconsole_target() unlinks the target while only holding
\ntarget_list_lock. However, when the underlying interface has been
\nunregistered, netconsole_netdev_event() moves the target from
\ntarget_list to target_cleanup_list, and netconsole_process_cleanups_core()
\nwalks that list under target_cleanup_list_lock only.<\/p>\n
If a user removes the configfs target at the same time the cleanup
\nworker is iterating target_cleanup_list, list_del() can corrupt the list
\nbecause the two paths take disjoint locks while operating on the same
\nlist node.<\/p>\n
Acquire target_cleanup_list_lock around the list_del() so the unlink is
\nserialised against netconsole_process_cleanups_core() regardless of
\nwhich list the target currently belongs to. The state transition that
\ndowngrades STATE_DEACTIVATED to STATE_DISABLED is left intact and is
\nperformed under the same combined locking, preserving the existing
\nordering with resume_target().<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
netconsole: take target_cleanup_list_lock in drop_netconsole_target()<\/p>\n
drop_netconsole_target() unlinks the target while only holdi<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-28657","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/28657","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=28657"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=28657"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=28657"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}