KVM: x86: Sysexit emulation does not mask RIP/RSP
If the operand size is not 64-bit, then the sysexit instruction should assign ECX to RSP and EDX to RIP. The current code assigns the full 64-bits. Fix it by masking. Signed-off-by: NNadav Amit <namit@cs.technion.ac.il> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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