[patch 29/37] tun: Return -EINVAL if neither IFF_TUN nor IFF_TAP is set.

[Greg KH]

2.6.31-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Kusanagi Kouichi <slash@xxxxxxxxxxxxxx>

[ Upstream commit 36989b90879c785f95b877bdcf65a2527dadd893 ]

After commit 2b980dbd77d229eb60588802162c9659726b11f4
("lsm: Add hooks to the TUN driver") tun_set_iff doesn't
return -EINVAL though neither IFF_TUN nor IFF_TAP is set.

Signed-off-by: Kusanagi Kouichi <slash@xxxxxxxxxxxxxx>
Reviewed-by: Paul Moore <paul.moore@xxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
 drivers/net/tun.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -943,8 +943,6 @@ static int tun_set_iff(struct net *net, 
 		char *name;
 		unsigned long flags = 0;
 
-		err = -EINVAL;
-
 		if (!capable(CAP_NET_ADMIN))
 			return -EPERM;
 
@@ -958,7 +956,7 @@ static int tun_set_iff(struct net *net, 
 			flags |= TUN_TAP_DEV;
 			name = "tap%d";
 		} else
-			goto failed;
+			return -EINVAL;
 
 		if (*ifr->ifr_name)
 			name = ifr->ifr_name;


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