[PATCH 3.18 117/121] vti6: better validate user provided tunnel names

3.18-stable review patch. If anyone has any objections, please let me know. -- From: Eric Dumazet [ Upstream commit 537b361fbcbcc3cd6fe2bb47069fd292b9256d16 ] Use valid_name() to make sure user does not provide illegal device name. Fixes: ed1efb2aefbb

[PATCH 3.18 117/121] vti6: better validate user provided tunnel names

3.18-stable review patch. If anyone has any objections, please let me know. -- From: Eric Dumazet [ Upstream commit 537b361fbcbcc3cd6fe2bb47069fd292b9256d16 ] Use valid_name() to make sure user does not provide illegal device name. Fixes: ed1efb2aefbb ("ipv6: Add support