eas_mdls: fix OOB read.

Bug: 34031018
AOSP-Change-Id: I8d373c905f64286b23ec819bdbee51368b12e85a

CVE-2017-0541

Change-Id: Ifb1825e25751e98b7f1d5355c5d3d0699ec08be7
(cherry picked from commit 56d1532)
(cherry picked from commit f7b1abeb6bfd9eb404be641ea347cf2b1198140e)

arm-wt-22k/lib_src/eas_mdls.c

@@ -114,6 +114,8 @@
 /* this define allows us to use the sndlib.h structures as RW memory */
 #define SCNST
 
+#include "log/log.h"
+
 #include "eas_data.h"
 #include "eas_host.h"
 #include "eas_mdls.h"
@@ -2086,8 +2088,11 @@ static EAS_RESULT PushcdlStack (EAS_U32 *pStack, EAS_INT *pStackPtr, EAS_U32 val
 {
 
     /* stack overflow, return an error */
-    if (*pStackPtr >= CDL_STACK_SIZE)
+    if (*pStackPtr >= (CDL_STACK_SIZE - 1)) {
+        ALOGE("b/34031018, stackPtr(%d)", *pStackPtr);
+        android_errorWriteLog(0x534e4554, "34031018");
         return EAS_ERROR_FILE_FORMAT;
+    }
 
     /* push the value onto the stack */
     *pStackPtr = *pStackPtr + 1;