linux-kernel - [PATCH net-next v2] liquidio: use strscpy() to instead of strncpy()

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Message-ID: <202212091534493764895@zte.com.cn>
Date:   Fri, 9 Dec 2022 15:34:49 +0800 (CST)
From:   <yang.yang29@....com.cn>
To:     <dchickles@...vell.com>
Cc:     <sburla@...vell.com>, <fmanlunas@...vell.com>,
        <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <xu.panda@....com.cn>,
        <yang.yang29@....com.cn>
Subject: [PATCH net-next v2] liquidio: use strscpy() to instead of strncpy()

From: Xu Panda <xu.panda@....com.cn>

The implementation of strscpy() is more robust and safer.
That's now the recommended way to copy NUL terminated strings.

Signed-off-by: Xu Panda <xu.panda@....com.cn>
Signed-off-by: Yang Yang <yang.yang29@....com>
---
change for v2
 - change the subject, replace linux-next with net-next.
---
 drivers/net/ethernet/cavium/liquidio/octeon_console.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/cavium/liquidio/octeon_console.c b/drivers/net/ethernet/cavium/liquidio/octeon_console.c
index 28feabec8fbb..67c3570f875f 100644
--- a/drivers/net/ethernet/cavium/liquidio/octeon_console.c
+++ b/drivers/net/ethernet/cavium/liquidio/octeon_console.c
@@ -247,8 +247,7 @@ static const struct cvmx_bootmem_named_block_desc
 					struct cvmx_bootmem_named_block_desc,
 					size));

-		strncpy(desc->name, name, sizeof(desc->name));
-		desc->name[sizeof(desc->name) - 1] = 0;
+		strscpy(desc->name, name, sizeof(desc->name));
 		return &oct->bootmem_named_block_desc;
 	} else {
 		return NULL;
@@ -471,8 +470,8 @@ static void output_console_line(struct octeon_device *oct,
 	if (line != &console_buffer[bytes_read]) {
 		console_buffer[bytes_read] = '\0';
 		len = strlen(console->leftover);
-		strncpy(&console->leftover[len], line,
-			sizeof(console->leftover) - len);
+		strscpy(&console->leftover[len], line,
+			sizeof(console->leftover) - len + 1);
 	}
 }

-- 
2.15.2