In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
powerpc\/iommu: Fix the overflow validation in iommu_tce_check_ioba<\/p>\n
The commit b1af23d836f8 (“KVM: PPC: iommu: Unify TCE checking”) unified
\nIOBA parameter checking across KVM and VFIO into iommu_tce_check_ioba().
\nWhile doing so, the passed in argument npages is ignored and constant
\nvalue ‘1’ is used leaving out a possible overflow as the callers can
\nlegitimately be using npages > 1 for H_STUFF_TCE or H_PUT_TCE_INDIRECT
\ncases.<\/p>\n
Fix this by accounting for ‘npages’, checking for arithmetic overflow,
\nand verifying that the entire requested range (ioba – offset + npages)
\ndoes not exceed the table capacity ‘size’.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
powerpc\/iommu: Fix the overflow validation in iommu_tce_check_ioba<\/p>\n
The commit b1af23d836f8 (“KVM: PPC: iommu: Unify TCE checking”)<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-33351","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/33351","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=33351"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=33351"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=33351"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}