1 files changed, 8 insertions, 0 deletions
diff --git a/indra/llimage/llimagepng.cpp b/indra/llimage/llimagepng.cpp
index 4d081ce169..d75084cf08 100644
--- a/indra/llimage/llimagepng.cpp
+++ b/indra/llimage/llimagepng.cpp
@@ -54,6 +54,8 @@ bool LLImagePNG::updateData()
 
     try
     {
+        LLImageDataLock lock(this);
+
         // Check to make sure that this instance has been initialized with data
         if (!getData() || (0 == getDataSize()))
         {
@@ -103,6 +105,9 @@ bool LLImagePNG::decode(LLImageRaw* raw_image, F32 decode_time)
 
     resetLastError();
 
+    LLImageDataSharedLock lockIn(this);
+    LLImageDataLock lockOut(raw_image);
+
     // Check to make sure that this instance has been initialized with data
     if (!getData() || (0 == getDataSize()))
     {
@@ -135,6 +140,9 @@ bool LLImagePNG::encode(const LLImageRaw* raw_image, F32 encode_time)
 
     resetLastError();
 
+    LLImageDataSharedLock lockIn(raw_image);
+    LLImageDataLock lockOut(this);
+
     // Image logical size
     setSize(raw_image->getWidth(), raw_image->getHeight(), raw_image->getComponents());