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KVM: nVMX: Truncate base/index GPR value on address calc in !64-bit
Drop bits 63:32 of the base and/or index GPRs when calculating the
effective address of a VMX instruction memory operand. Outside of 64-bit
mode, memory encodings are strictly limited to E*X and below.
Fixes: 064aea7747
("KVM: nVMX: Decoding memory operands of VMX instructions")
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210422022128.3464144-7-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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parent
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1 changed files with 2 additions and 2 deletions
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@ -4619,9 +4619,9 @@ int get_vmx_mem_address(struct kvm_vcpu *vcpu, unsigned long exit_qualification,
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else if (addr_size == 0)
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off = (gva_t)sign_extend64(off, 15);
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if (base_is_valid)
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off += kvm_register_read(vcpu, base_reg);
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off += kvm_register_readl(vcpu, base_reg);
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if (index_is_valid)
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off += kvm_register_read(vcpu, index_reg) << scaling;
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off += kvm_register_readl(vcpu, index_reg) << scaling;
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vmx_get_segment(vcpu, &s, seg_reg);
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/*
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