In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
xfrm: avoid lock inversion in nat keepalive work<\/p>\n
nat_keepalive_work() walks the state table while xfrm_state_walk()
\nholds net->xfrm.xfrm_state_lock. Its callback then acquires x->lock,
\nwhich conflicts with the delete path taking the same locks in reverse
\norder via xfrm_state_delete() and __xfrm_state_delete(). This creates
\nan AB-BA deadlock that is reported by lockdep when a NAT keepalive
\nworker races with SA deletion.<\/p>\n
Fix this by splitting the keepalive walk into two phases. First,
\ncollect the candidate states while the walk holds xfrm_state_lock and
\ntake a reference on each state. Then, after the walk completes, process
\neach collected state and acquire x->lock without nesting it under
\nxfrm_state_lock.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
xfrm: avoid lock inversion in nat keepalive work<\/p>\n
nat_keepalive_work() walks the state table while xfrm_state_walk()
\nholds net->xfr<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-17349","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/17349","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=17349"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=17349"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=17349"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}