KVM: check injected pic irq within valid pic irqs

Check that an injected pic irq is between 0 and 15.

Signed-off-by: Ben-Ami Yassour <benami@il.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
index 5857f59ad4aa..c31164e8aa46 100644
--- a/arch/x86/kvm/i8259.c
+++ b/arch/x86/kvm/i8259.c
@@ -130,8 +130,10 @@ void kvm_pic_set_irq(void *opaque, int irq, int level)
 {
         struct kvm_pic *s = opaque;
 
-        pic_set_irq1(&s->pics[irq >> 3], irq & 7, level);
-        pic_update_irq(s);
+        if (irq >= 0 && irq < PIC_NUM_PINS) {
+                pic_set_irq1(&s->pics[irq >> 3], irq & 7, level);
+                pic_update_irq(s);
+        }
 }
 
 /*