In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
gve: DQO: reject TSO packets with an out of range MSS<\/p>\n
gve_prep_tso() notes that the device requires the MSS to be len and gso_segs, never gso_size.<\/p>\n
Such a packet reaches gve_tx_fill_tso_ctx_desc(), which puts gso_size
\ninto the mss field of the TSO context descriptor. This field is 14 bits
\nwide, so a gso_size of 16384 is silently turned into an MSS of zero.<\/p>\n
Drop these packets from gve_prep_tso(), and make sure that
\ngve_features_check_dqo() leaves their GSO bits alone: skb_segment()
\nsplits at gso_size regardless of the MTU, so falling back to software
\nsegmentation would give the device non TSO packets bigger than the
\n9728 bytes it supports.<\/p>\n
Note that the device can still be given oversized non TSO packets when
\nthe stack segments in software for other reasons, for instance after
\nTSO has been disabled with ethtool. This is a generic issue, because
\nthe MTU check is skipped for GSO packets in the forwarding path, and
\nis addressed separately.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
gve: DQO: reject TSO packets with an out of range MSS<\/p>\n
gve_prep_tso() notes that the device requires the MSS to be len and gso_segs<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-41028","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/41028","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=41028"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41028"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41028"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}