2 files changed, 40 insertions, 4 deletions
diff --git a/indra/llimage/llimage.cpp b/indra/llimage/llimage.cpp
index c7f02a6b1a..feb97ec2ab 100644
--- a/indra/llimage/llimage.cpp
+++ b/indra/llimage/llimage.cpp
@@ -1075,6 +1075,11 @@ void LLImageRaw::composite( LLImageRaw* src )
 {
 	LLImageRaw* dst = this;  // Just for clarity.
 
+	if (!validateSrcAndDst("LLImageRaw::composite", src, dst))
+	{
+		return;
+	}
+
 	llassert(3 == src->getComponents());
 	llassert(3 == dst->getComponents());
 
@@ -1176,6 +1181,11 @@ void LLImageRaw::copyUnscaledAlphaMask( LLImageRaw* src, const LLColor4U& fill)
 {
 	LLImageRaw* dst = this;  // Just for clarity.
 
+	if (!validateSrcAndDst("LLImageRaw::copyUnscaledAlphaMask", src, dst))
+	{
+		return;
+	}
+
 	llassert( 1 == src->getComponents() );
 	llassert( 4 == dst->getComponents() );
 	llassert( (src->getWidth() == dst->getWidth()) && (src->getHeight() == dst->getHeight()) );
@@ -1242,14 +1252,13 @@ LLPointer<LLImageRaw> LLImageRaw::duplicate()
 // Src and dst can be any size.  Src and dst can each have 3 or 4 components.
 void LLImageRaw::copy(LLImageRaw* src)
 {
-	if (!src)
+	LLImageRaw* dst = this;  // Just for clarity.
+
+	if (!validateSrcAndDst("LLImageRaw::copy", src, dst))
 	{
-		LL_WARNS() << "LLImageRaw::copy called with a null src pointer" << LL_ENDL;
 		return;
 	}
 
-	LLImageRaw* dst = this;  // Just for clarity.
-
 	if( (src->getWidth() == dst->getWidth()) && (src->getHeight() == dst->getHeight()) )
 	{
 		// No scaling needed
@@ -1376,6 +1385,11 @@ void LLImageRaw::copyScaled( LLImageRaw* src )
 {
 	LLImageRaw* dst = this;  // Just for clarity.
 
+	if (!validateSrcAndDst("LLImageRaw::copyScaled", src, dst))
+	{
+		return;
+	}
+
 	llassert_always( (1 == src->getComponents()) || (3 == src->getComponents()) || (4 == src->getComponents()) );
 	llassert_always( src->getComponents() == dst->getComponents() );
 
@@ -1709,6 +1723,25 @@ void LLImageRaw::compositeRowScaled4onto3( U8* in, U8* out, S32 in_pixel_len, S3
 	}
 }
 
+bool LLImageRaw::validateSrcAndDst(std::string func, LLImageRaw* src, LLImageRaw* dst)
+{
+	if (!src || !dst || src->isBufferInvalid() || dst->isBufferInvalid())
+	{
+		LL_WARNS() << func << ": Source: ";
+		if (!src) LL_CONT << "Null pointer";
+		else if (src->isBufferInvalid()) LL_CONT << "Invalid buffer";
+		else LL_CONT << "OK";
+
+		LL_CONT << "; Destination: ";
+		if (!dst) LL_CONT << "Null pointer";
+		else if (dst->isBufferInvalid()) LL_CONT << "Invalid buffer";
+		else LL_CONT << "OK";
+		LL_CONT << "." << LL_ENDL;
+
+		return false;
+	}
+	return true;
+}
 
 //----------------------------------------------------------------------------
 
diff --git a/indra/llimage/llimage.h b/indra/llimage/llimage.h
index adc650d360..9cc7431a9c 100644
--- a/indra/llimage/llimage.h
+++ b/indra/llimage/llimage.h
@@ -277,6 +277,9 @@ protected:
 public:
 	static S32 sGlobalRawMemory;
 	static S32 sRawImageCount;
+
+private:
+	bool validateSrcAndDst(std::string func, LLImageRaw* src, LLImageRaw* dst);
 };
 
 // Compressed representation of image.