Re: [PATCH v3] tun: bail out from tun_get_user() if the skb is empty

[David Miller]

From: Alexander Potapenko <glider@xxxxxxxxxx>
Date: Thu, 28 Sep 2017 11:32:37 +0200

> KMSAN (https://github.com/google/kmsan) reported accessing uninitialized
> skb->data[0] in the case the skb is empty (i.e. skb->len is 0):
 ...
> Make sure tun_get_user() doesn't touch skb->data[0] unless there is
> actual data.
 ...
> Signed-off-by: Alexander Potapenko <glider@xxxxxxxxxx>

Applied and queued up for -stable, thanks.