This is a note to let you know that I've just added the patch titled

tun: allow positive return values on dev_get_valid_name() call

to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: tun-allow-positive-return-values-on-dev_get_valid_name-call.patch and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Wed Nov 15 17:24:03 CET 2017

From: Julien Gomes julien@arista.com Date: Wed, 25 Oct 2017 11:50:50 -0700 Subject: tun: allow positive return values on dev_get_valid_name() call

From: Julien Gomes julien@arista.com

[ 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 --- drivers/net/tun.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -1788,7 +1788,7 @@ static int tun_set_iff(struct net *net, 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);

Patches currently in stable-queue which might be from julien@arista.com are

queue-4.9/tun-allow-positive-return-values-on-dev_get_valid_name-call.patch