Linux Ethernet Bridging - Aug 2022 - [Bridge] [PATCH] bridge: move from strlcpy with unused retval to strscpy

Follow the advice of the below link and prefer 'strscpy' in this
subsystem. Conversion is 1:1 because the return value is not used.
Generated by a coccinelle script.

Link:
https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw at
mail.gmail.com/
Signed-off-by: Wolfram Sang <wsa+renesas at sang-engineering.com>
---
 net/bridge/br_device.c          | 8 ++++----
 net/bridge/br_sysfs_if.c        | 4 ++--
 net/bridge/netfilter/ebtables.c | 2 +-
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index 58a4f70e01e3..b82906fc999a 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -251,10 +251,10 @@ static int br_set_mac_address(struct net_device *dev, void
*p)
 
 static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info)
 {
-	strlcpy(info->driver, "bridge", sizeof(info->driver));
-	strlcpy(info->version, BR_VERSION, sizeof(info->version));
-	strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
-	strlcpy(info->bus_info, "N/A", sizeof(info->bus_info));
+	strscpy(info->driver, "bridge", sizeof(info->driver));
+	strscpy(info->version, BR_VERSION, sizeof(info->version));
+	strscpy(info->fw_version, "N/A", sizeof(info->fw_version));
+	strscpy(info->bus_info, "N/A", sizeof(info->bus_info));
 }
 
 static int br_get_link_ksettings(struct net_device *dev,
diff --git a/net/bridge/br_sysfs_if.c b/net/bridge/br_sysfs_if.c
index 07fa76080512..74fdd8105dca 100644
--- a/net/bridge/br_sysfs_if.c
+++ b/net/bridge/br_sysfs_if.c
@@ -384,7 +384,7 @@ int br_sysfs_addif(struct net_bridge_port *p)
 			return err;
 	}
 
-	strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ);
+	strscpy(p->sysfs_name, p->dev->name, IFNAMSIZ);
 	return sysfs_create_link(br->ifobj, &p->kobj, p->sysfs_name);
 }
 
@@ -406,7 +406,7 @@ int br_sysfs_renameif(struct net_bridge_port *p)
 		netdev_notice(br->dev, "unable to rename link %s to %s",
 			      p->sysfs_name, p->dev->name);
 	else
-		strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ);
+		strscpy(p->sysfs_name, p->dev->name, IFNAMSIZ);
 
 	return err;
 }
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index f2dbefb61ce8..3c3ecd4cddb5 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -1446,7 +1446,7 @@ static inline int ebt_obj_to_user(char __user *um, const
char *_name,
 	/* ebtables expects 31 bytes long names but xt_match names are 29 bytes
 	 * long. Copy 29 bytes and fill remaining bytes with zeroes.
 	 */
-	strlcpy(name, _name, sizeof(name));
+	strscpy(name, _name, sizeof(name));
 	if (copy_to_user(um, name, EBT_EXTENSION_MAXNAMELEN) ||
 	    put_user(revision, (u8 __user *)(um + EBT_EXTENSION_MAXNAMELEN)) ||
 	    put_user(datasize, (int __user *)(um + EBT_EXTENSION_MAXNAMELEN + 1)) ||
-- 
2.35.1

On 19/08/2022 00:02, Wolfram Sang wrote:
> Follow the advice of the below link and prefer 'strscpy' in this
> subsystem. Conversion is 1:1 because the return value is not used.
> Generated by a coccinelle script.
> 
> Link:
https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw at
mail.gmail.com/
> Signed-off-by: Wolfram Sang <wsa+renesas at sang-engineering.com>
> ---
>  net/bridge/br_device.c          | 8 ++++----
>  net/bridge/br_sysfs_if.c        | 4 ++--
>  net/bridge/netfilter/ebtables.c | 2 +-
>  3 files changed, 7 insertions(+), 7 deletions(-)
> 
Looks good, but should be targeted at net-next.
Acked-by: Nikolay Aleksandrov <razor at blackwall.org>

Hello:

This patch was applied to netdev/net-next.git (master)
by Jakub Kicinski <kuba at kernel.org>:

On Thu, 18 Aug 2022 23:02:12 +0200 you wrote:
> Follow the advice of the below link and prefer 'strscpy' in this
> subsystem. Conversion is 1:1 because the return value is not used.
> Generated by a coccinelle script.
> 
> Link:
https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw at
mail.gmail.com/
> Signed-off-by: Wolfram Sang <wsa+renesas at sang-engineering.com>
> 
> [...]
Here is the summary with links:
  - bridge: move from strlcpy with unused retval to strscpy
    https://git.kernel.org/netdev/net-next/c/993e1634ab44

You are awesome, thank you!
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