KVM: x86: Emulator does not calculate address correctly

[platform/kernel/linux-rpi.git] / arch / x86 / kvm / emulate.c

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 058aff8..bdd4197 100644 (file)
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -655,7 +655,8 @@ static __always_inline int __linearize(struct x86_emulate_ctxt *ctxt,
        u16 sel;
        unsigned cpl;
 
-       la = seg_base(ctxt, addr.seg) + addr.ea;
+       la = seg_base(ctxt, addr.seg) +
+           (fetch || ctxt->ad_bytes == 8 ? addr.ea : (u32)addr.ea);
        *max_size = 0;
        switch (ctxt->mode) {
        case X86EMUL_MODE_PROT64:
@@ -717,7 +718,7 @@ static __always_inline int __linearize(struct x86_emulate_ctxt *ctxt,
                }
                break;
        }
-       if (fetch ? ctxt->mode != X86EMUL_MODE_PROT64 : ctxt->ad_bytes != 8)
+       if (ctxt->mode != X86EMUL_MODE_PROT64)
                la &= (u32)-1;
        if (insn_aligned(ctxt, size) && ((la & (size - 1)) != 0))
                return emulate_gp(ctxt, 0);