tile cache: handle null processor due to out of bounds

Author: Grok Compression

src/lib/core/codestream/decompress/CodeStreamDecompress.cpp

@@ -1592,7 +1592,8 @@ ITileProcessor* CodeStreamDecompress::getTileProcessor(uint16_t tileIndex)
 
     tileProcessor =
         new TileProcessor(tileIndex, tcp, this, stream_, false, tileCache_->getStrategy());
-    tileCache_->put(tileIndex, tileProcessor);
+    if(!tileCache_->put(tileIndex, tileProcessor))
+      return nullptr;
   }
   return tileProcessor;
 }

src/lib/core/codestream/decompress/CodeStreamDecompress_ReadMarkers.cpp

@@ -379,15 +379,17 @@ bool CodeStreamDecompress::readSOT(uint8_t* headerData, uint16_t headerSize)
     // Record SOT info for non-slated tiles so tilePartSeq_ is populated
     // for potential future decode via decompressFromCachedTileParts()
     auto processor = getTileProcessor(tileIndex);
-    if(!processor->readSOT(this->stream_, headerData, headerSize, currTilePartInfo_, false))
+    if(!processor ||
+       !processor->readSOT(this->stream_, headerData, headerSize, currTilePartInfo_, false))
       return false;
     return currTilePartInfo_.tilePartLength_
                ? stream_->skip((int64_t)(currTilePartInfo_.tilePartLength_ - sotMarkerSegmentLen))
                : true;
   }
 
   auto processor = getTileProcessor(tileIndex);
-  if(!processor->readSOT(this->stream_, headerData, headerSize, currTilePartInfo_, false))
+  if(!processor ||
+     !processor->readSOT(this->stream_, headerData, headerSize, currTilePartInfo_, false))
     return false;
   currTileProcessor_ = processor;
   return true;