In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
NFSv4\/flexfiles: fix NULL dereference for NFSv4.0 data servers<\/p>\n
flexfiles accepts NFSv4.0 data servers, but two NFSv4 code paths assume
\nthe data server client has a session. Unlike NFSv4.1+, an NFSv4.0 client
\nhas no session (clp->cl_session is NULL; it uses clp->cl_slot_tbl), so
\nI\/O to a v4.0 flexfiles DS oopses:<\/p>\n
– nfs4_init_ds_session() dereferences clp->cl_session->session_state
\n while seeding the DS lease. It also only seeds cl_lease_time when
\n NFS4_SESSION_INITING is set; without a session that never happens, so
\n cl_lease_time stays 0 and nfs4_renew_state() busy-loops, requeuing
\n every 5 seconds. Seed the lease whenever there is no session and
\n return before touching session state.<\/p>\n
– ff_layout_async_handle_error_v4() dereferences
\n clp->cl_session->fc_slot_table on every DS I\/O error. Fall back to the
\n v4.0 transport slot table (clp->cl_slot_tbl) when there is no session.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
NFSv4\/flexfiles: fix NULL dereference for NFSv4.0 data servers<\/p>\n
flexfiles accepts NFSv4.0 data servers, but two NFSv4 code paths as<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25558","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25558","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=25558"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25558"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25558"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}