crypto: algif_skcipher - Do not set MAY_BACKLOG on the async path

commit dad41997063723eaf5f77bc2015606a5a9bce320 upstream.

The async path cannot use MAY_BACKLOG because it is not meant to
block, which is what MAY_BACKLOG does.  On the other hand, both
the sync and async paths can make use of MAY_SLEEP.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/crypto/algif_skcipher.c b/crypto/algif_skcipher.c
index 878fcaf344450f035d820c8522b170b5d35df53b..8ea54ac958ac85afcbd62ba9429c2525dd720f51 100644 (file)
--- a/crypto/algif_skcipher.c
+++ b/crypto/algif_skcipher.c
@@ -536,7 +536,7 @@ static int skcipher_recvmsg_async(struct socket *sock, struct msghdr *msg,
        sg_init_table(sreq->tsg, tx_nents);
        memcpy(iv, ctx->iv, ivsize);
        skcipher_request_set_tfm(req, tfm);
-       skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
+       skcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP,
                                      skcipher_async_cb, sreq);
 
        while (iov_iter_count(&msg->msg_iter)) {
@@ -950,7 +950,8 @@ static int skcipher_accept_parent_nokey(void *private, struct sock *sk)
        ask->private = ctx;
 
        skcipher_request_set_tfm(&ctx->req, skcipher);
-       skcipher_request_set_callback(&ctx->req, CRYPTO_TFM_REQ_MAY_BACKLOG,
+       skcipher_request_set_callback(&ctx->req, CRYPTO_TFM_REQ_MAY_SLEEP |
+                                                CRYPTO_TFM_REQ_MAY_BACKLOG,
                                      af_alg_complete, &ctx->completion);
 
        sk->sk_destruct = skcipher_sock_destruct;