ethtool: Null-terminate filename passed to ethtool_ops::flash_device

The parameters for ETHTOOL_FLASHDEV include a filename, which ought to
be null-terminated.  Currently the only driver that implements
ethtool_ops::flash_device attempts to add a null terminator if
necessary, but does it wrongly.  Do it in the ethtool core instead.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/emulex/benet/be_ethtool.c b/drivers/net/ethernet/emulex/benet/be_ethtool.c
index 6db6b6a..802e5dd 100644 (file)
--- a/drivers/net/ethernet/emulex/benet/be_ethtool.c
+++ b/drivers/net/ethernet/emulex/benet/be_ethtool.c
@@ -716,12 +716,8 @@ static int
 be_do_flash(struct net_device *netdev, struct ethtool_flash *efl)
 {
        struct be_adapter *adapter = netdev_priv(netdev);
-       char file_name[ETHTOOL_FLASH_MAX_FILENAME];
 
-       file_name[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
-       strcpy(file_name, efl->data);
-
-       return be_load_fw(adapter, file_name);
+       return be_load_fw(adapter, efl->data);
 }
 
 static int

diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 369b418..3f79db1 100644 (file)
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -1190,6 +1190,8 @@ static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
        if (!dev->ethtool_ops->flash_device)
                return -EOPNOTSUPP;
 
+       efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
+
        return dev->ethtool_ops->flash_device(dev, &efl);
 }