Check malloc result to avoid NPD

Bug: 28471206
Change-Id: Id5d055d76893d6f53a2e524ff5f282d1ddca3345

media/libstagefright/MPEG4Extractor.cpp

@@ -543,6 +543,10 @@ status_t MPEG4Extractor::readMetaData() {
     }
     if (psshsize) {
         char *buf = (char*)malloc(psshsize);
+        if (!buf) {
+            ALOGE("b/28471206");
+            return NO_MEMORY;
+        }
         char *ptr = buf;
         for (size_t i = 0; i < mPssh.size(); i++) {
             memcpy(ptr, mPssh[i].uuid, 20); // uuid + length
@@ -1635,6 +1639,11 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
 
             sp<ABuffer> buffer = new ABuffer(chunk_data_size);
 
+            if (buffer->data() == NULL) {
+                ALOGE("b/28471206");
+                return NO_MEMORY;
+            }
+
             if (mDataSource->readAt(
                         data_offset, buffer->data(), chunk_data_size) < chunk_data_size) {
                 return ERROR_IO;
@@ -1649,6 +1658,11 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
         {
             sp<ABuffer> buffer = new ABuffer(chunk_data_size);
 
+            if (buffer->data() == NULL) {
+                ALOGE("b/28471206");
+                return NO_MEMORY;
+            }
+
             if (mDataSource->readAt(
                         data_offset, buffer->data(), chunk_data_size) < chunk_data_size) {
                 return ERROR_IO;
@@ -1952,6 +1966,10 @@ status_t MPEG4Extractor::parseChunk(off64_t *offset, int depth) {
                     return ERROR_MALFORMED;
                 }
                 sp<ABuffer> buffer = new ABuffer(chunk_data_size + 1);
+                if (buffer->data() == NULL) {
+                    ALOGE("b/28471206");
+                    return NO_MEMORY;
+                }
                 if (mDataSource->readAt(
                     data_offset, buffer->data(), chunk_data_size) != (ssize_t)chunk_data_size) {
                     return ERROR_IO;