In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
LoongArch: BPF: Zero-extend signed ALU32 div\/mod results<\/p>\n
ALU32 operations write a 32-bit result and leave the upper 32 bits of
\nthe BPF register zero. The LoongArch JIT sign-extends the result of
\nsigned ALU32 BPF_DIV and BPF_MOD (off=1), so a negative 32-bit quotient
\nor remainder leaves bits 63:32 set in JITted code while the verifier
\nand interpreter model those bits as zero.<\/p>\n
Keep sign-extension on the operands, which signed divide needs, and
\nzero-extend the ALU32 result after the divide or modulo instruction,
\nmatching the unsigned ALU32 div\/mod paths and every other ALU32
\noperation in this JIT.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
LoongArch: BPF: Zero-extend signed ALU32 div\/mod results<\/p>\n
ALU32 operations write a 32-bit result and leave the upper 32 bits of
\nthe<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-5414","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/5414","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=5414"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5414"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5414"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}