double-check unpackedBuffer created in DWA uncompress

Signed-off-by: Peter Hillman <[email protected]>
cary-ilm · May 12, 2021 · 2e17ee6 · 2e17ee6
1 parent cd985ea
commit 2e17ee6
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/OpenEXR/IlmImf/ImfDwaCompressor.cpp b/OpenEXR/IlmImf/ImfDwaCompressor.cpp
@@ -2533,7 +2533,7 @@ DwaCompressor::uncompress
 
     if (acCompressedSize > 0)
     {
-        if (totalAcUncompressedCount*sizeof(unsigned short) > _packedAcBufferSize)
+        if ( !_packedAcBuffer || totalAcUncompressedCount*sizeof(unsigned short) > _packedAcBufferSize)
         {
             throw IEX_NAMESPACE::InputExc("Error uncompressing DWA data"
                                 "(corrupt header).");