In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
bpf: Preserve pointer spill metadata during half-slot cleanup<\/p>\n
__clean_func_state() cleans dead stack slots in 4-byte halves. When the
\nhigh half of a STACK_SPILL slot is dead and the low half remains live,
\ncleanup converts the live low half to STACK_MISC or STACK_ZERO and clears
\nthe saved spilled_ptr metadata.<\/p>\n
That conversion is safe only for scalar spills. For a pointer spill, this
\nmetadata clear lets a later 32-bit fill from the still-live half avoid the
\nnormal non-scalar register-fill check and be treated as an ordinary scalar
\nstack read.<\/p>\n
Leave non-scalar spill slots intact in this half-live shape. This is
\nconservative for pruning and preserves the existing
\ncheck_stack_read_fixed_off() rejection path for partial fills from pointer
\nspills.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
bpf: Preserve pointer spill metadata during half-slot cleanup<\/p>\n
__clean_func_state() cleans dead stack slots in 4-byte halves. When <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-7085","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/7085","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=7085"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7085"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7085"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}