diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/tun.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c index db43a2409733..6acbdbccebcd 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -501,7 +501,7 @@ static void tun_detach_all(struct net_device *dev) module_put(THIS_MODULE); } -static int tun_attach(struct tun_struct *tun, struct file *file) +static int tun_attach(struct tun_struct *tun, struct file *file, bool skip_filter) { struct tun_file *tfile = file->private_data; int err; @@ -526,7 +526,7 @@ static int tun_attach(struct tun_struct *tun, struct file *file) err = 0; /* Re-attach the filter to presist device */ - if (tun->filter_attached == true) { + if (!skip_filter && (tun->filter_attached == true)) { err = sk_attach_filter(&tun->fprog, tfile->socket.sk); if (!err) goto out; @@ -1557,7 +1557,7 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr) if (err < 0) return err; - err = tun_attach(tun, file); + err = tun_attach(tun, file, ifr->ifr_flags & IFF_NOFILTER); if (err < 0) return err; @@ -1631,7 +1631,7 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr) dev->vlan_features = dev->features; INIT_LIST_HEAD(&tun->disabled); - err = tun_attach(tun, file); + err = tun_attach(tun, file, false); if (err < 0) goto err_free_dev; @@ -1795,7 +1795,7 @@ static int tun_set_queue(struct file *file, struct ifreq *ifr) ret = security_tun_dev_attach_queue(tun->security); if (ret < 0) goto unlock; - ret = tun_attach(tun, file); + ret = tun_attach(tun, file, false); } else if (ifr->ifr_flags & IFF_DETACH_QUEUE) { tun = rtnl_dereference(tfile->tun); if (!tun || !(tun->flags & TUN_TAP_MQ) || tfile->detached) @@ -1883,6 +1883,8 @@ static long __tun_chr_ioctl(struct file *file, unsigned int cmd, if (tfile->detached) ifr.ifr_flags |= IFF_DETACH_QUEUE; + if (!tfile->socket.sk->sk_filter) + ifr.ifr_flags |= IFF_NOFILTER; if (copy_to_user(argp, &ifr, ifreq_len)) ret = -EFAULT; |