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tun: set the flags before registering the netdevice

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Otherwise, register_netdevice advertises the creation of the device with
the default flags, instead of what the user requested.

Reported-by: Thomas Haller <thaller@redhat.com>
Fixes: 1ec010e705 ("tun: export flags, uid, gid, queue information over netlink")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sabrina Dubroca 2018-04-10 16:28:55 +02:00 committed by David S. Miller
parent 47b998653f
commit 9fffc5c6dd
1 changed files with 6 additions and 3 deletions
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9
drivers/net/tun.c
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@ -2564,6 +2564,9 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
*/
return 0;
}
tun->flags = (tun->flags & ~TUN_FEATURES) |
(ifr->ifr_flags & TUN_FEATURES);
}
else {
char *name;
@ -2642,6 +2645,9 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
~(NETIF_F_HW_VLAN_CTAG_TX |
NETIF_F_HW_VLAN_STAG_TX);
tun->flags = (tun->flags & ~TUN_FEATURES) |
(ifr->ifr_flags & TUN_FEATURES);
INIT_LIST_HEAD(&tun->disabled);
err = tun_attach(tun, file, false, ifr->ifr_flags & IFF_NAPI);
if (err < 0)
@ -2656,9 +2662,6 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
tun_debug(KERN_INFO, tun, "tun_set_iff\n");
tun->flags = (tun->flags & ~TUN_FEATURES) |
(ifr->ifr_flags & TUN_FEATURES);
/* Make sure persistent devices do not get stuck in
* xoff state.
*/