From d7bd15792ea3d2613aa5a0b09d948dc2ef77dfcf Mon Sep 17 00:00:00 2001
From: lingsheng <lingsheng@huawei.com>
Date: Wed, 27 Jan 2021 15:00:32 +0800
Subject: [PATCH] Add check for ports to avoid Segmentation fault

---
 tools/umax_pp.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/tools/umax_pp.c b/tools/umax_pp.c
index 7b127e3..00ffea9 100644
--- a/tools/umax_pp.c
+++ b/tools/umax_pp.c
@@ -355,12 +355,15 @@ main (int argc, char **argv)
       if (rc != 1)
 	{
 	  ports = sanei_parport_find_port ();
-	  i = 0;
-	  rc = 0;
-	  while ((ports[i] != NULL) && (rc != 1))
+	  if (ports != NULL)
 	    {
-	      rc = sanei_umax_pp_initPort (strtol (ports[i], NULL, 16), NULL);
-	      i++;
+	      i = 0;
+	      rc = 0;
+	      while ((ports[i] != NULL) && (rc != 1))
+	        {
+	          rc = sanei_umax_pp_initPort (strtol (ports[i], NULL, 16), NULL);
+	          i++;
+	        }
 	    }
 	}
       if (rc != 1)
-- 
2.23.0