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 <[email protected]> Signed-off-by: David S. Miller <[email protected]>
mrcsosa · Feb 1, 2012 · 786f528 · 786f528
1 parent efcdbf2
commit 786f528
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diff --git 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
@@ -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);
 }