In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
iommu\/arm-smmu-v3-iommufd: Require exactly one Stream ID for a vDEVICE<\/p>\n
arm_vsmmu_vsid_to_sid() maps a guest’s vSID to a single physical Stream ID
\ntaken from master->streams[0], assuming a device has exactly one stream. A
\ndevice with several streams gets only its first one mapped, so a guest vSID
\ninvalidation cannot reach the others’ ATC and IOTLB entries; a device with
\nnone makes master->streams a ZERO_SIZE_PTR, read out of bounds.<\/p>\n
Add an arm_vsmmu_vdevice_init() op to reject the vDEVICE with -EOPNOTSUPP
\nwhen master->num_streams is not one, rather than mapping it silently.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
iommu\/arm-smmu-v3-iommufd: Require exactly one Stream ID for a vDEVICE<\/p>\n
arm_vsmmu_vsid_to_sid() maps a guest’s vSID to a single phy<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-7594","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/7594","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=7594"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7594"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7594"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}