diff --git a/drm/mediadrm/plugins/clearkey/hidl/CryptoPlugin.cpp b/drm/mediadrm/plugins/clearkey/hidl/CryptoPlugin.cpp
index 1495703..d278633 100644
--- a/drm/mediadrm/plugins/clearkey/hidl/CryptoPlugin.cpp
+++ b/drm/mediadrm/plugins/clearkey/hidl/CryptoPlugin.cpp
@@ -119,7 +119,11 @@
         return Void();
     }
 
-    if (source.offset + offset + source.size > sourceBase->getSize()) {
+    size_t totalSize = 0;
+    if (__builtin_add_overflow(source.offset, offset, &totalSize) ||
+        __builtin_add_overflow(totalSize, source.size, &totalSize) ||
+        totalSize > sourceBase->getSize()) {
+        android_errorWriteLog(0x534e4554, "176496160");
         _hidl_cb(Status_V1_2::ERROR_DRM_CANNOT_HANDLE, 0, "invalid buffer size");
         return Void();
     }