Description
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Fix SPSR_EL2 restore in kvm_hyp_handle_mops() kvm_hyp_handle_mops() resets the single-step state machine as part of rewinding state for a MOPS exception by modifying vcpu_cpsr() and writing the result directly into hardware. In the case of nested virtualization, vcpu_cpsr() is a synthetic value such that the rest of KVM can deal with vEL2 cleanly. That means the value requires translation before being written into hardware, which is unfortunately missing from the MOPS handler. Fix it by directly modifying SPSR_EL2 and avoiding the synthetic state altogether, which will be resynchronized on the next 'full' exit back to KVM.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
2de451a329cf662beeba71f63c7f83ee24ca6642 to < 10a568010e827108d149779908850afaec898846affected2de451a329cf662beeba71f63c7f83ee24ca6642 to < 884b44256041ec6b2dcbe8e6a67384d26145cba1affected2de451a329cf662beeba71f63c7f83ee24ca6642 to < dd3b237eb7780d65eae296d3d3a70012b6e7a02faffected2de451a329cf662beeba71f63c7f83ee24ca6642 to < ff1022c3de46753eb7eba2f6efd990569e66ff95affected
Linux Linux
Default version status: affected
6.7affected0 to < 6.7unaffected6.12.97 to ≤ 6.12.*unaffected6.18.40 to ≤ 6.18.*unaffected7.1.5 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected