linux-kernel - [PATCH net-next v1] hinic: fix strncpy output truncated compile warnings

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Date:   Fri, 7 Aug 2020 10:09:14 +0800
From:   Luo bin <luobin9@...wei.com>
To:     <davem@...emloft.net>
CC:     <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        <luoxianjun@...wei.com>, <yin.yinshi@...wei.com>,
        <cloud.wangxiaoyun@...wei.com>, <chiqijun@...wei.com>
Subject: [PATCH net-next v1] hinic: fix strncpy output truncated compile warnings

fix the compile warnings of 'strncpy' output truncated before
terminating nul copying N bytes from a string of the same length

Signed-off-by: Luo bin <luobin9@...wei.com>
Reported-by: kernel test robot <lkp@...el.com>
---
V0~V1:
- use the strlen()+1 pattern consistently

 drivers/net/ethernet/huawei/hinic/hinic_devlink.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/huawei/hinic/hinic_devlink.c b/drivers/net/ethernet/huawei/hinic/hinic_devlink.c
index c6adc776f3c8..1ec88ebf81d6 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_devlink.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_devlink.c
@@ -342,9 +342,9 @@ static int chip_fault_show(struct devlink_fmsg *fmsg,
 
 	level = event->event.chip.err_level;
 	if (level < FAULT_LEVEL_MAX)
-		strncpy(level_str, fault_level[level], strlen(fault_level[level]));
+		strncpy(level_str, fault_level[level], strlen(fault_level[level]) + 1);
 	else
-		strncpy(level_str, "Unknown", strlen("Unknown"));
+		strncpy(level_str, "Unknown", strlen("Unknown") + 1);
 
 	if (level == FAULT_LEVEL_SERIOUS_FLR) {
 		err = devlink_fmsg_u32_pair_put(fmsg, "Function level err func_id",
@@ -388,9 +388,9 @@ static int fault_report_show(struct devlink_fmsg *fmsg,
 	int err;
 
 	if (event->type < FAULT_TYPE_MAX)
-		strncpy(type_str, fault_type[event->type], strlen(fault_type[event->type]));
+		strncpy(type_str, fault_type[event->type], strlen(fault_type[event->type]) + 1);
 	else
-		strncpy(type_str, "Unknown", strlen("Unknown"));
+		strncpy(type_str, "Unknown", strlen("Unknown") + 1);
 
 	err = devlink_fmsg_string_pair_put(fmsg, "Fault type", type_str);
 	if (err)
-- 
2.17.1