In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
RDMA\/mad: Fix receive buffer leak when PKey enforcement fails<\/p>\n
ib_mad_complete_recv() initializes mad_recv_wc->rmpp_list and then runs
\nib_mad_enforce_security() before linking recv_buf onto that list. On
\nfailure it calls ib_free_recv_mad(), which only walks rmpp_list and frees
\nthe ib_mad_private of every buffer found there. As the list is still
\nempty at that point, nothing is freed at all.<\/p>\n
The caller cannot clean up either: ib_mad_recv_done() sets recv to NULL
\nright after ib_mad_complete_recv() returns, assuming the MAD layer took
\nownership of the buffer. Every MAD that fails the PKey check therefore
\nleaks one ib_mad_private (about 300 bytes per IB port MAD, ~2K for OPA),
\nand a remote node can trigger this repeatedly by sending MADs with a
\nwrong PKey.<\/p>\n
Link recv_buf onto rmpp_list right after the list is initialized, so the
\nerror path has something to free.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
RDMA\/mad: Fix receive buffer leak when PKey enforcement fails<\/p>\n
ib_mad_complete_recv() initializes mad_recv_wc->rmpp_list and then r<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-33423","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/33423","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=33423"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=33423"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=33423"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}