diff options
| author | Julien Gomes <julien@arista.com> | 2017-10-25 21:50:50 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-18 13:30:38 +0300 |
| commit | fa46a4aff8496ae3d7b067fb820830cb1326031f (patch) | |
| tree | e32fc9d115ae1edab21d6b9d297432a153254224 /drivers | |
| parent | 8838e7ea8d532d226111f6be8e7467b0e9e23d54 (diff) | |
| download | linux-fa46a4aff8496ae3d7b067fb820830cb1326031f.tar.xz | |
tun: allow positive return values on dev_get_valid_name() call
[ Upstream commit 5c25f65fd1e42685f7ccd80e0621829c105785d9 ]
If the name argument of dev_get_valid_name() contains "%d", it will try
to assign it a unit number in __dev__alloc_name() and return either the
unit number (>= 0) or an error code (< 0).
Considering positive values as error values prevent tun device creations
relying this mechanism, therefor we should only consider negative values
as errors here.
Signed-off-by: Julien Gomes <julien@arista.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/tun.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 9e7b4e7d3f97..87d18f313ebc 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -1814,7 +1814,7 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr) if (!dev) return -ENOMEM; err = dev_get_valid_name(net, dev, name); - if (err) + if (err < 0) goto err_free_dev; dev_net_set(dev, net); |