[Xen-devel] [PATCH] x86/PV: fix off-by-one in I/O bitmap limit check

["Jan Beulich" <JBeulich@xxxxxxxx>]

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/xen/arch/x86/pv/emul-priv-op.c
+++ b/xen/arch/x86/pv/emul-priv-op.c
@@ -136,7 +136,7 @@ static bool guest_io_okay(unsigned int p
     if ( iopl_ok(v, regs) )
         return true;
 
-    if ( v->arch.pv_vcpu.iobmp_limit > (port + bytes) )
+    if ( v->arch.pv_vcpu.iobmp_limit >= (port + bytes) )
     {
         union { uint8_t bytes[2]; uint16_t mask; } x;
 




_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel