Received-SPF: pass (google.com: domain of linux-kernel+bounces-10923-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:40f1:3f00::1 as permitted sender) client-ip=2604:1380:40f1:3f00::1;
From: ZhaoLong Wang <wangzhaolong1@huawei.com>
To: <richard@nod.at>, <miquel.raynal@bootlin.com>, <vigneshr@ti.com>
CC: <linux-mtd@lists.infradead.org>, <linux-kernel@vger.kernel.org>,
	<chengzhihao1@huawei.com>, <wangzhaolong1@huawei.com>, <yi.zhang@huawei.com>,
	<yangerkun@huawei.com>
Subject: [PATCH v5 4/5] ubi: Reserve sufficient buffer length for the input mask
Date: Mon, 25 Dec 2023 15:10:54 +0800
Message-ID: <20231225071055.1721000-5-wangzhaolong1@huawei.com>
In-Reply-To: <20231225071055.1721000-1-wangzhaolong1@huawei.com>
References: <20231225071055.1721000-1-wangzhaolong1@huawei.com>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Content-Type: text/plain

Because the mask received by the emulate_failures interface
is a 32-bit unsigned integer, ensure that there is sufficient
buffer length to receive and display this value.

Signed-off-by: ZhaoLong Wang <wangzhaolong1@huawei.com>
Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com>
---
 drivers/mtd/ubi/debug.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/ubi/debug.c b/drivers/mtd/ubi/debug.c
index e8aa1827f23a..b4f40cd2bdaf 100644
--- a/drivers/mtd/ubi/debug.c
+++ b/drivers/mtd/ubi/debug.c
@@ -332,7 +332,7 @@ static ssize_t dfs_file_read(struct file *file, char __user *user_buf,
 	struct dentry *dent = file->f_path.dentry;
 	struct ubi_device *ubi;
 	struct ubi_debug_info *d;
-	char buf[8];
+	char buf[16];
 	int val;
 
 	ubi = ubi_get_device(ubi_num);
@@ -400,7 +400,7 @@ static ssize_t dfs_file_write(struct file *file, const char __user *user_buf,
 	struct ubi_device *ubi;
 	struct ubi_debug_info *d;
 	size_t buf_size;
-	char buf[8] = {0};
+	char buf[16] = {0};
 	int val;
 
 	ubi = ubi_get_device(ubi_num);
-- 
2.39.2