diff --git a/src/codec/SkWebpCodec.cpp b/src/codec/SkWebpCodec.cpp
index 6cfb385..8acd205 100644
--- a/src/codec/SkWebpCodec.cpp
+++ b/src/codec/SkWebpCodec.cpp
@@ -235,7 +235,10 @@
     while (true) {
         const size_t bytesRead = stream()->read(buffer, BUFFER_SIZE);
         if (0 == bytesRead) {
-            WebPIDecGetRGB(idec, rowsDecoded, NULL, NULL, NULL);
+            if (!WebPIDecGetRGB(idec, rowsDecoded, NULL, NULL, NULL)
+                    || rowsDecoded && *rowsDecoded <= 0) {
+                return kInvalidInput;
+            }
             return kIncompleteInput;
         }