Fix potential overflow

Bug: 28533562
Change-Id: I798ab24caa4c81f3ba564cad7c9ee019284fb702

media/libstagefright/codecs/on2/h264dec/source/h264bsd_dpb.c

diff --git a/media/libstagefright/codecs/on2/h264dec/source/h264bsd_dpb.c b/media/libstagefright/codecs/on2/h264dec/source/h264bsd_dpb.c
index 9517d0a..799bd16 100644
--- a/media/libstagefright/codecs/on2/h264dec/source/h264bsd_dpb.c
+++ b/media/libstagefright/codecs/on2/h264dec/source/h264bsd_dpb.c
@@ -60,6 +60,7 @@
 #include "h264bsd_util.h"
 #include "basetype.h"
 
+#include <log/log.h>
 /*------------------------------------------------------------------------------
     2. External compiler flags
 --------------------------------------------------------------------------------
@@ -998,6 +999,13 @@
     ASSERT(maxFrameNum);
     ASSERT(dpbSize);
 
+    // see comment in loop below about size calculation
+    if (picSizeInMbs > (UINT32_MAX - 32 - 15) / 384) {
+        ALOGE("b/28533562");
+        android_errorWriteLog(0x534e4554, "28533562");
+        return(MEMORY_ALLOCATION_ERROR);
+    }
+
     dpb->maxLongTermFrameIdx = NO_LONG_TERM_FRAME_INDICES;
     dpb->maxRefFrames        = MAX(maxRefFrames, 1);
     if (noReordering)