net: ethernet: use strscpy() to instead of strncpy()

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

Posted by yang.yang29@zte.com.cn 3 years, 4 months ago

From: Xu Panda <xu.panda@zte.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@zte.com.cn>
Signed-off-by: Yang Yang <yang.yang29@zte.com>
---
 drivers/net/ethernet/myricom/myri10ge/myri10ge.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/myricom/myri10ge/myri10ge.c b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c
index 9063e2e22cd5..8073d7a90a26 100644
--- a/drivers/net/ethernet/myricom/myri10ge/myri10ge.c
+++ b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c
@@ -552,8 +552,7 @@ myri10ge_validate_firmware(struct myri10ge_priv *mgp,
 	}

 	/* save firmware version for ethtool */
-	strncpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));
-	mgp->fw_version[sizeof(mgp->fw_version) - 1] = '\0';
+	strscpy(mgp->fw_version, hdr->version, sizeof(mgp->fw_version));

 	sscanf(mgp->fw_version, "%d.%d.%d", &mgp->fw_ver_major,
 	       &mgp->fw_ver_minor, &mgp->fw_ver_tiny);
-- 
2.15.2

Re: [PATCH linux-next] net: ethernet: use strscpy() to instead of strncpy()

Posted by Simon Horman 3 years, 4 months ago

On Thu, Dec 08, 2022 at 07:52:03PM +0800, yang.yang29@zte.com.cn wrote:
> From: Xu Panda <xu.panda@zte.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@zte.com.cn>
> Signed-off-by: Yang Yang <yang.yang29@zte.com>

This change looks good to me, but I think the subject should be:

  [PATCH net-next] myri10ge: use strscpy() to instead of strncpy()

That not withstanding,

Reviewed-by: Simon Horman <simon.horman@corigine.com>