From 4238396058d8d0af6452720cb78a4f06c4898e52 Mon Sep 17 00:00:00 2001
From: arvinzzz <zhaotianyu9@huawei.com>
Date: Sat, 18 Dec 2021 18:52:30 +0800
Subject: [PATCH] =?UTF-8?q?fixed=206ee8e14=20from=20https://gitee.com/arvi?=
 =?UTF-8?q?nzzz/third=5Fparty=5Fmusl/pulls/177=20fix:=20=E4=BF=AE=E5=A4=8D?=
 =?UTF-8?q?fopen=E5=85=A5=E5=8F=82=E6=A3=80=E9=AA=8C=E4=B8=8D=E5=85=A8?=
 =?UTF-8?q?=E5=AF=BC=E8=87=B4=E8=AE=BF=E9=97=AE=E5=BC=82=E5=B8=B8?=
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当mode入参为空也做错误返回

close: #I4N0WY

Signed-off-by: arvinzzz <zhaotianyu9@huawei.com>
Change-Id: I0b0b997b6498b53da6324ea60d2502c3d2e80be3
---
 porting/liteos_m/kernel/src/stdio/fopen.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/porting/liteos_m/kernel/src/stdio/fopen.c b/porting/liteos_m/kernel/src/stdio/fopen.c
index 7dddf930..56086846 100644
--- a/porting/liteos_m/kernel/src/stdio/fopen.c
+++ b/porting/liteos_m/kernel/src/stdio/fopen.c
@@ -12,7 +12,7 @@ FILE *fopen(const char *restrict filename, const char *restrict mode)
 	int flags;
 
 	/* Check for valid initial mode character */
-	if (!strchr("rwa", *mode)) {
+	if ((mode == NULL) || (!strchr("rwa", *mode))) {
 		errno = EINVAL;
 		return 0;
 	}
-- 
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