In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
KVM: arm64: vgic: Check the interrupt is still ours before migrating it<\/p>\n
vgic_prune_ap_list() drops both ap_list_lock and irq_lock while migrating
\nan interrupt to another vCPU. After reacquiring the locks it only checks
\nthat the affinity is unchanged (target_vcpu == vgic_target_oracle(irq))
\nbefore moving the interrupt, which assumes that an interrupt whose affinity
\nis preserved is still queued on this vCPU’s ap_list.<\/p>\n
That assumption no longer holds if the interrupt is taken off the ap_list
\nwhile the locks are dropped. vgic_flush_pending_lpis() removes the
\ninterrupt from the list and sets irq->vcpu to NULL, but leaves
\nenabled\/pending\/target_vcpu untouched. As the interrupt is still enabled
\nand pending, vgic_target_oracle() returns the same target_vcpu, so the
\naffinity check passes and list_del() is run a second time on an entry that
\nhas already been removed.<\/p>\n
Also check that the interrupt is still assigned to this vCPU
\n(irq->vcpu == vcpu) before moving it.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
KVM: arm64: vgic: Check the interrupt is still ours before migrating it<\/p>\n
vgic_prune_ap_list() drops both ap_list_lock and irq_lock <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-6909","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/6909","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=6909"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6909"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6909"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}