The check on the higher limit of the segment, and the check on the
maximum accessible size, is the same for both expand-up and
expand-down segments. Only the computation of "lim" varies.
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
---
arch/x86/kvm/emulate.c | 13 ++++---------
1 file changed, 4 insertions(+), 9 deletions(-)
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 43a5b432d06f..f62209e7ad84 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -654,20 +654,15 @@ static __always_inline int __linearize(struct x86_emulate_ctxt *ctxt,
if (!fetch && (desc.type & 8) && !(desc.type & 2))
goto bad;
lim = desc_limit_scaled(&desc);
- if ((desc.type & 8) || !(desc.type & 4)) {
- /* expand-up segment */
- if (addr.ea > lim)
- goto bad;
- *max_size = min_t(u64, ~0u, (u64)lim + 1 - addr.ea);
- } else {
+ if (!(desc.type & 8) && (desc.type & 4)) {
/* expand-down segment */
if (addr.ea <= lim)
goto bad;
lim = desc.d ? 0xffffffff : 0xffff;
- if (addr.ea > lim)
- goto bad;
- *max_size = min_t(u64, ~0u, (u64)lim + 1 - addr.ea);
}
+ if (addr.ea > lim)
+ goto bad;
+ *max_size = min_t(u64, ~0u, (u64)lim + 1 - addr.ea);
if (size > *max_size)
goto bad;
la &= (u32)-1;
--
1.8.3.1
--
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