ethtool: fix drvinfo strings set in drivers

Use strlcpy where possible to ensure the string is \0 terminated.
Use always sizeof(string) instead of 32, ETHTOOL_BUSINFO_LEN
and custom defines.
Use snprintf instead of sprint.
Remove unnecessary inits of ->fw_version
Remove unnecessary inits of drvinfo struct.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>

6 files changed, 18 insertions, 18 deletions

diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 4a6d31a082b9..09f9108d4688 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -640,9 +640,9 @@ static int vlan_ethtool_get_settings(struct net_device *dev,
 static void vlan_ethtool_get_drvinfo(struct net_device *dev,
                                      struct ethtool_drvinfo *info)
 {
-        strcpy(info->driver, vlan_fullname);
-        strcpy(info->version, vlan_version);
-        strcpy(info->fw_version, "N/A");
+        strlcpy(info->driver, vlan_fullname, sizeof(info->driver));
+        strlcpy(info->version, vlan_version, sizeof(info->version));
+        strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
 }
 
 static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index fa388b2c60d7..90f4049a90dd 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -580,10 +580,10 @@ static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 static void batadv_get_drvinfo(struct net_device *dev,
                                struct ethtool_drvinfo *info)
 {
-        strcpy(info->driver, "B.A.T.M.A.N. advanced");
-        strcpy(info->version, BATADV_SOURCE_VERSION);
-        strcpy(info->fw_version, "N/A");
-        strcpy(info->bus_info, "batman");
+        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));
 }
 
 static u32 batadv_get_msglevel(struct net_device *dev)
diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index 38974f70ec7b..e1bc090bc00a 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -184,10 +184,10 @@ static int br_set_mac_address(struct net_device *dev, void *p)
 
 static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info)
 {
-        strcpy(info->driver, "bridge");
-        strcpy(info->version, BR_VERSION);
-        strcpy(info->fw_version, "N/A");
-        strcpy(info->bus_info, "N/A");
+        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));
 }
 
 static netdev_features_t br_fix_features(struct net_device *dev,
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index e32083d5d8f8..f795b0ca7ee6 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -203,10 +203,10 @@ dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 static void dsa_slave_get_drvinfo(struct net_device *dev,
                                   struct ethtool_drvinfo *drvinfo)
 {
-        strncpy(drvinfo->driver, "dsa", 32);
-        strncpy(drvinfo->version, dsa_driver_version, 32);
-        strncpy(drvinfo->fw_version, "N/A", 32);
-        strncpy(drvinfo->bus_info, "platform", 32);
+        strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
+        strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
+        strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
+        strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
 }
 
 static int dsa_slave_nway_reset(struct net_device *dev)
diff --git a/net/openvswitch/vport-internal_dev.c b/net/openvswitch/vport-internal_dev.c
index 44cd5c3a4c22..0531de6c7a4a 100644
--- a/net/openvswitch/vport-internal_dev.c
+++ b/net/openvswitch/vport-internal_dev.c
@@ -97,7 +97,7 @@ static int internal_dev_stop(struct net_device *netdev)
 static void internal_dev_getinfo(struct net_device *netdev,
                                  struct ethtool_drvinfo *info)
 {
-        strcpy(info->driver, "openvswitch");
+        strlcpy(info->driver, "openvswitch", sizeof(info->driver));
 }
 
 static const struct ethtool_ops internal_dev_ethtool_ops = {
diff --git a/net/wireless/ethtool.c b/net/wireless/ethtool.c
index 48c48ffafa1d..e37862f1b127 100644
--- a/net/wireless/ethtool.c
+++ b/net/wireless/ethtool.c
@@ -15,10 +15,10 @@ static void cfg80211_get_drvinfo(struct net_device *dev,
         strlcpy(info->version, init_utsname()->release, sizeof(info->version));
 
         if (wdev->wiphy->fw_version[0])
-                strncpy(info->fw_version, wdev->wiphy->fw_version,
+                strlcpy(info->fw_version, wdev->wiphy->fw_version,
                         sizeof(info->fw_version));
         else
-                strncpy(info->fw_version, "N/A", sizeof(info->fw_version));
+                strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
 
         strlcpy(info->bus_info, dev_name(wiphy_dev(wdev->wiphy)),
                 sizeof(info->bus_info));