From 5d4c935b8a1ea8bb0efed11b204de06f96fdb6b1 Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Fri, 8 Jan 2016 21:31:04 +0800
Subject: [PATCH] crypto: algif_hash - Require setkey before accept(2)

commit 6de62f15b581f920ade22d758f4c338311c2f0d4 upstream.

Hash implementations that require a key may crash if you use
them without setting a key.  This patch adds the necessary checks
so that if you do attempt to use them without a key that we return
-ENOKEY instead of proceeding.

This patch also adds a compatibility path to support old applications
that do acept(2) before setkey.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
[bwh: Backported to 3.2:
 - Add struct kiocb * parameter to {recv,send}msg ops
 - Adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
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