do not perform arithmetic on nullptr

AntelopeIO · Sep 19, 2023 · 0234a41 · 0234a41
1 parent 7be27dc
commit 0234a41
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/libraries/wasm-jit/Include/Inline/Serialization.h b/libraries/wasm-jit/Include/Inline/Serialization.h
@@ -35,7 +35,7 @@ namespace Serialization
 		// Advances the stream cursor by numBytes, and returns a pointer to the previous stream cursor.
 		inline U8* advance(Uptr numBytes)
 		{
-			if(next + numBytes > end) { extendBuffer(numBytes); }
+			if(next == nullptr || next + numBytes > end) { extendBuffer(numBytes); }
 			WAVM_ASSERT_THROW(next + numBytes <= end);
 
 			U8* data = next;