Index: acpica-unix2-20180209/source/compiler/aslanalyze.c
===================================================================
--- acpica-unix2-20180209.orig/source/compiler/aslanalyze.c
+++ acpica-unix2-20180209/source/compiler/aslanalyze.c
@@ -355,11 +355,16 @@ AnCheckMethodReturnValue (
          */
         if (ThisNodeBtype != 0)
         {
-            sprintf (MsgBuffer,
+	     int cnt;
+	     char *strp;
+
+            cnt = asprintf (&strp,
                 "Method returns [%s], %s operator requires [%s]",
                 StringBuffer, OpInfo->Name, StringBuffer2);
 
-            AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, ArgOp, MsgBuffer);
+            AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, ArgOp, strp);
+	     if (cnt > 0)
+	         free(strp);
         }
     }
 }
Index: acpica-unix2-20180209/source/compiler/aslpredef.c
===================================================================
--- acpica-unix2-20180209.orig/source/compiler/aslpredef.c
+++ acpica-unix2-20180209/source/compiler/aslpredef.c
@@ -159,14 +159,19 @@ ApCheckForPredefinedMethod (
         if (MethodInfo->NumReturnNoValue &&
             ThisName->Info.ExpectedBtypes)
         {
+	     int cnt;
+	     char *strp;
+
             AcpiUtGetExpectedReturnTypes (StringBuffer,
                 ThisName->Info.ExpectedBtypes);
 
-            sprintf (MsgBuffer, "%s required for %4.4s",
-                StringBuffer, ThisName->Info.Name);
+            cnt = asprintf (&strp, "%s required for %4.4s",
+	        StringBuffer, ThisName->Info.Name);
 
             AslError (ASL_WARNING, ASL_MSG_RESERVED_RETURN_VALUE, Op,
-                MsgBuffer);
+                strp);
+	     if (cnt > 0)
+	        free(strp);
         }
         break;
     }
@@ -698,18 +703,26 @@ TypeErrorExit:
 
     AcpiUtGetExpectedReturnTypes (StringBuffer, ExpectedBtypes);
 
-    if (PackageIndex == ACPI_NOT_PACKAGE_ELEMENT)
-    {
-        sprintf (MsgBuffer, "%4.4s: found %s, %s required",
-            PredefinedName, TypeName, StringBuffer);
-    }
-    else
     {
-        sprintf (MsgBuffer, "%4.4s: found %s at index %u, %s required",
-            PredefinedName, TypeName, PackageIndex, StringBuffer);
+        int cnt;
+	char *strp;
+
+        if (PackageIndex == ACPI_NOT_PACKAGE_ELEMENT)
+        {
+            cnt = asprintf (&strp, "%4.4s: found %s, %s required",
+                PredefinedName, TypeName, StringBuffer);
+        }
+        else
+        {
+            cnt = asprintf (&strp, "%4.4s: found %s at index %u, %s required",
+                PredefinedName, TypeName, PackageIndex, StringBuffer);
+        }
+
+        AslError (ASL_ERROR, ASL_MSG_RESERVED_OPERAND_TYPE, Op, strp);
+	if (cnt > 0)
+	    free(strp);
     }
 
-    AslError (ASL_ERROR, ASL_MSG_RESERVED_OPERAND_TYPE, Op, MsgBuffer);
     return (AE_TYPE);
 }
 
Index: acpica-unix2-20180209/source/compiler/aslwalks.c
===================================================================
--- acpica-unix2-20180209.orig/source/compiler/aslwalks.c
+++ acpica-unix2-20180209/source/compiler/aslwalks.c
@@ -507,15 +507,19 @@ AnOperandTypecheckWalkEnd (
             else if (!CommonBtypes)
             {
                 /* No match -- this is a type mismatch error */
+		int cnt;
+		char *strp;
 
                 AnFormatBtype (StringBuffer, ThisNodeBtype);
                 AnFormatBtype (StringBuffer2, RequiredBtypes);
 
-                sprintf (MsgBuffer, "[%s] found, %s operator requires [%s]",
+                cnt = asprintf (&strp, "[%s] found, %s operator requires [%s]",
                     StringBuffer, OpInfo->Name, StringBuffer2);
 
                 AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE,
-                    ArgOp, MsgBuffer);
+                    ArgOp, strp);
+		if (cnt > 0)
+		    free(strp);
             }
 
         NextArgument: