Checking structure sizes before reading them from memory to avoid overflowing the buffer's stream.

src/core/SkRRect.cpp

Index: src/core/SkRRect.cpp
diff --git a/src/core/SkRRect.cpp b/src/core/SkRRect.cpp
index e3d11cb01efb294221315a9b2879f17332e0da7a..bcbf37ec5927925cb3109e9391d36876f6538985 100644
--- a/src/core/SkRRect.cpp
+++ b/src/core/SkRRect.cpp
@@ -259,7 +259,7 @@ void SkRRect::inset(SkScalar dx, SkScalar dy, SkRRect* dst) const {
 
 ///////////////////////////////////////////////////////////////////////////////
 
-uint32_t SkRRect::writeToMemory(void* buffer) const {
+size_t SkRRect::writeToMemory(void* buffer) const {
     SkASSERT(kSizeInMemory == sizeof(SkRect) + sizeof(fRadii));
 
     memcpy(buffer, &fRect, sizeof(SkRect));
@@ -267,7 +267,11 @@ uint32_t SkRRect::writeToMemory(void* buffer) const {
     return kSizeInMemory;
 }
 
-uint32_t SkRRect::readFromMemory(const void* buffer) {
+size_t SkRRect::readFromMemory(const void* buffer, size_t length) {
+    if (length < kSizeInMemory) {
+        return 0;
+    }
+
     SkScalar storage[12];
     SkASSERT(sizeof(storage) == kSizeInMemory);