Commit a5625189 authored by Avi Kivity's avatar Avi Kivity Committed by Marcelo Tosatti
Browse files

KVM: x86 emulator: Check segment limits in real mode too



Segment limits are verified in real mode, not just protected mode.

Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent 03ebebeb
......@@ -668,8 +668,6 @@ static int __linearize(struct x86_emulate_ctxt *ctxt,
la = seg_base(ctxt, addr.seg) + addr.ea;
switch (ctxt->mode) {
case X86EMUL_MODE_REAL:
break;
case X86EMUL_MODE_PROT64:
if (((signed long)la << 16) >> 16 != la)
return emulate_gp(ctxt, 0);
......@@ -699,7 +697,10 @@ static int __linearize(struct x86_emulate_ctxt *ctxt,
goto bad;
}
cpl = ctxt->ops->cpl(ctxt);
rpl = sel & 3;
if (ctxt->mode == X86EMUL_MODE_REAL)
rpl = 0;
else
rpl = sel & 3;
cpl = max(cpl, rpl);
if (!(desc.type & 8)) {
/* data segment */
......
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