[PATCH] crypto: algif_hash - correctly handle algos without state

[Sasha Levin]

Algorithms without state will cause the creation of a 0 sized array, which
is undefined outside of structs.

Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
---
 crypto/algif_hash.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crypto/algif_hash.c b/crypto/algif_hash.c
index 68a5cea..a9f923f 100644
--- a/crypto/algif_hash.c
+++ b/crypto/algif_hash.c
@@ -184,7 +184,7 @@ static int hash_accept(struct socket *sock, struct socket *newsock, int flags)
 	struct alg_sock *ask = alg_sk(sk);
 	struct hash_ctx *ctx = ask->private;
 	struct ahash_request *req = &ctx->req;
-	char state[crypto_ahash_statesize(crypto_ahash_reqtfm(req))];
+	char state[crypto_ahash_statesize(crypto_ahash_reqtfm(req))?:1];
 	struct sock *sk2;
 	struct alg_sock *ask2;
 	struct hash_ctx *ctx2;
-- 
1.7.10.4