[PATCH v2 3/4] crypto: algif_hash - wait for crypto_ahash_init() to complete

[Rui Wang]

hash_sendmsg/sendpage() need to wait for the completion
of crypto_ahash_init() otherwise it can cause panic.

Signed-off-by: Rui Wang <rui.y.w...@intel.com>
---
 crypto/algif_hash.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/crypto/algif_hash.c b/crypto/algif_hash.c
index b4c24fe..83dc095 100644
--- a/crypto/algif_hash.c
+++ b/crypto/algif_hash.c
@@ -49,7 +49,8 @@ static int hash_sendmsg(struct socket *sock, struct msghdr 
*msg,
 
        lock_sock(sk);
        if (!ctx->more) {
-               err = crypto_ahash_init(&ctx->req);
+               err = af_alg_wait_for_completion(crypto_ahash_init(&ctx->req),
+                                               &ctx->completion);
                if (err)
                        goto unlock;
        }
@@ -120,6 +121,7 @@ static ssize_t hash_sendpage(struct socket *sock, struct 
page *page,
        } else {
                if (!ctx->more) {
                        err = crypto_ahash_init(&ctx->req);
+                       err = af_alg_wait_for_completion(err, &ctx->completion);
                        if (err)
                                goto unlock;
                }
-- 
1.8.3.1