[PATCH 3.19.y-ckt 005/170] crypto: algif_skcipher - Add key check exception for cipher_null

3.19.8-ckt18 -stable review patch. If anyone has any objections, please let me know. ---8< From: Herbert Xu commit 6e8d8ecf438792ecf7a3207488fb4eebc4edb040 upstream. This patch adds an exception to the

[PATCH 3.19.y-ckt 005/170] crypto: algif_skcipher - Add key check exception for cipher_null

3.19.8-ckt18 -stable review patch. If anyone has any objections, please let me know. ---8< From: Herbert Xu commit 6e8d8ecf438792ecf7a3207488fb4eebc4edb040 upstream. This patch adds an exception to the key check so that cipher_null