MAINT-5343 (Viewer sometimes crashes when updating a local tga texture when...

MAINT-5343 (Viewer sometimes crashes when updating a local tga texture when RLE or BMP compression is disabled - LLImageTGA::decodeTruecolorNonRle)

indra/llimage/llimagebmp.cpp

@@ -443,6 +443,10 @@ BOOL LLImageBMP::decodeColorMask32( U8* dst, U8* src )
 		mBitfieldMask[2] = 0x000000FF;
 	}
 
+	if (getWidth() * getHeight() * 4 > getDataSize() - mBitmapOffset)
+	{ //here we have situation when data size in src less than actually needed
+		return FALSE;
+	}
 
 	S32 src_row_span = getWidth() * 4;
 	S32 alignment_bytes = (3 * src_row_span) % 4;  // round up to nearest multiple of 4
@@ -476,6 +480,11 @@ BOOL LLImageBMP::decodeColorTable8( U8* dst, U8* src )
 	S32 src_row_span = getWidth() * 1;
 	S32 alignment_bytes = (3 * src_row_span) % 4;  // round up to nearest multiple of 4
 
+	if ((getWidth() * getHeight()) + getHeight() * alignment_bytes > getDataSize() - mBitmapOffset)
+	{ //here we have situation when data size in src less than actually needed
+		return FALSE;
+	}
+
 	for( S32 row = 0; row < getHeight(); row++ )
 	{
 		for( S32 col = 0; col < getWidth(); col++ )
@@ -501,6 +510,11 @@ BOOL LLImageBMP::decodeTruecolor24( U8* dst, U8* src )
 	S32 src_row_span = getWidth() * 3;
 	S32 alignment_bytes = (3 * src_row_span) % 4;  // round up to nearest multiple of 4
 
+	if ((getWidth() * getHeight() * 3) + getHeight() * alignment_bytes > getDataSize() - mBitmapOffset)
+	{ //here we have situation when data size in src less than actually needed
+		return FALSE;
+	}
+
 	for( S32 row = 0; row < getHeight(); row++ )
 	{
 		for( S32 col = 0; col < getWidth(); col++ )

indra/llimage/llimagetga.cpp

@@ -437,7 +437,13 @@ BOOL LLImageTGA::decodeTruecolorNonRle( LLImageRaw* raw_image, BOOL &alpha_opaqu
 	// Origin is the bottom left
 	U8* dst = raw_image->getData();
 	U8* src = getData() + mDataOffset;
+
 	S32 pixels = getWidth() * getHeight();
+	
+	if (pixels * (mIs15Bit ? 2 : getComponents()) > getDataSize() - mDataOffset)
+	{ //here we have situation when data size in src less than actually needed
+		return FALSE;
+	}
 
 	if (getComponents() == 4)
 	{