In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
RDMA\/mlx5: Fix integer overflow of user QP buffer size<\/p>\n
set_user_buf_size() computes the QP buffer size by left-shifting the
\nuser-supplied rq.wqe_cnt and rq.wqe_shift values as signed integers.
\nA sufficiently large rq.wqe_cnt causes signed integer overflow, which
\nis undefined behavior, and yields a small or negative buf_size, causing
\nib_umem_get() to map a buffer smaller than the hardware will actually
\nwrite into.<\/p>\n
Replace the shifts and addition with check_shl_overflow() and
\ncheck_add_overflow(), rejecting invalid user inputs.<\/p>\n
Moreover, guard the identical shift computing qp->sq.offset in
\n_create_user_qp() before set_user_buf_size() is reached.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
RDMA\/mlx5: Fix integer overflow of user QP buffer size<\/p>\n
set_user_buf_size() computes the QP buffer size by left-shifting the
\nuser-s<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25844","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25844","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=25844"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25844"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25844"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}