From dd8c66d90e347eebecbd8f81ce1b3309f286d3a8 Mon Sep 17 00:00:00 2001
From: Alibek Omarov <a1ba.omarov@gmail.com>
Date: Thu, 4 Apr 2024 18:41:47 +0300
Subject: [PATCH] engine: common: fix possible NULL dereference in
 LZSS_Compress

---
 engine/common/common.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/engine/common/common.c b/engine/common/common.c
index d373dae0..b97f4369 100644
--- a/engine/common/common.c
+++ b/engine/common/common.c
@@ -390,6 +390,9 @@ byte *LZSS_Compress( byte *pInput, int inputLength, uint *pOutputSize )
 	byte		*pFinal = NULL;
 	lzss_state_t	state;
 
+	if( !pStart )
+		return NULL;
+
 	memset( &state, 0, sizeof( state ));
 	state.window_size = LZSS_WINDOW_SIZE;