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-rw-r--r--arch/x86/kvm/mmu.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h
index 3ed6192d93b1..67e7ec2eb7e0 100644
--- a/arch/x86/kvm/mmu.h
+++ b/arch/x86/kvm/mmu.h
@@ -48,6 +48,9 @@
static inline u64 rsvd_bits(int s, int e)
{
+ if (e < s)
+ return 0;
+
return ((1ULL << (e - s + 1)) - 1) << s;
}