From c13c26f415405e3203d91f601409497f8aa930dd Mon Sep 17 00:00:00 2001
From: chengguipeng <chengguipeng1@huawei.com>
Date: Thu, 3 Sep 2020 16:54:34 +0800
Subject: [PATCH] 2
Avoid NULL pointer dereference in function re_case_expand. 
Because parse_regexp() will return NULL pointer when the input parameter is abnomal.
---
 src/fa.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/fa.c b/src/fa.c
index 8e1d7d4..7935041 100644
--- a/src/fa.c
+++ b/src/fa.c
@@ -4447,7 +4447,7 @@ int fa_expand_nocase(const char *regexp, size_t regexp_len,
     parse.rend = regexp + regexp_len;
     parse.error = REG_NOERROR;
     re = parse_regexp(&parse);
-    if (parse.error != REG_NOERROR)
+    if (re == NULL)
         return parse.error;
 
     r = re_case_expand(re);
-- 
1.8.3.1