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[2/4] batman-adv: Replace usage of strlcpy with strscpy

Message ID 20190808130619.4481-3-sw@simonwunderlich.de
State Not Applicable, archived
Delegated to: Simon Wunderlich
Headers show
Series [1/4] batman-adv: Start new development cycle | expand

Commit Message

Simon Wunderlich Aug. 8, 2019, 1:06 p.m. UTC
From: Sven Eckelmann <sven@narfation.org>

The strscpy was introduced to fix some API problems around strlcpy. And
checkpatch started to report recently that strlcpy is deprecated and
strscpy is preferred.

The functionality introduced in commit 30035e45753b ("string: provide
strscpy()") improves following points compared to strlcpy:

* it doesn't read from memory beyond (src + size)
* provides an easy way to check for destination buffer overflow
* robust against asynchronous source buffer changes

Since batman-adv doesn't depend on any of the previously mentioned behavior
changes, the usage of strlcpy can simply be replaced by strscpy to silence

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
 net/batman-adv/soft-interface.c | 8 ++++----
 net/batman-adv/sysfs.c          | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)
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diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index c7a2e77ca1da..a1146cb10919 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -943,10 +943,10 @@  static const struct net_device_ops batadv_netdev_ops = {
 static void batadv_get_drvinfo(struct net_device *dev,
 			       struct ethtool_drvinfo *info)
-	strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver));
-	strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version));
-	strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
-	strlcpy(info->bus_info, "batman", sizeof(info->bus_info));
+	strscpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver));
+	strscpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version));
+	strscpy(info->fw_version, "N/A", sizeof(info->fw_version));
+	strscpy(info->bus_info, "batman", sizeof(info->bus_info));
 /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
diff --git a/net/batman-adv/sysfs.c b/net/batman-adv/sysfs.c
index 1efcb97039cd..e5bbc28ed12c 100644
--- a/net/batman-adv/sysfs.c
+++ b/net/batman-adv/sysfs.c
@@ -1070,7 +1070,7 @@  static ssize_t batadv_store_mesh_iface(struct kobject *kobj,
 	INIT_WORK(&store_work->work, batadv_store_mesh_iface_work);
 	store_work->net_dev = net_dev;
-	strlcpy(store_work->soft_iface_name, buff,
+	strscpy(store_work->soft_iface_name, buff,
 	queue_work(batadv_event_workqueue, &store_work->work);