diff options
| -rw-r--r-- | crypto/algif_hash.c | 38 |
1 files changed, 25 insertions, 13 deletions
diff --git a/crypto/algif_hash.c b/crypto/algif_hash.c index dfb048cefb6073..0ab43e149f0e4a 100644 --- a/crypto/algif_hash.c +++ b/crypto/algif_hash.c @@ -76,13 +76,30 @@ static int hash_sendmsg(struct socket *sock, struct msghdr *msg, lock_sock(sk); if (!continuing) { - if ((msg->msg_flags & MSG_MORE)) - hash_free_result(sk, ctx); + /* Discard a previous request that wasn't marked MSG_MORE. */ + hash_free_result(sk, ctx); + if (!msg_data_left(msg)) + goto done; /* Zero-length; don't start new req */ need_init = true; + } else if (!msg_data_left(msg)) { + /* + * No data - finalise the prev req if MSG_MORE so any error + * comes out here. + */ + if (!(msg->msg_flags & MSG_MORE)) { + err = hash_alloc_result(sk, ctx); + if (err) + goto unlock_free; + ahash_request_set_crypt(&ctx->req, NULL, + ctx->result, 0); + err = crypto_wait_req(crypto_ahash_final(&ctx->req), + &ctx->wait); + if (err) + goto unlock_free; + } + goto done_more; } - ctx->more = false; - while (msg_data_left(msg)) { ctx->sgl.sgt.sgl = ctx->sgl.sgl; ctx->sgl.sgt.nents = 0; @@ -93,15 +110,6 @@ static int hash_sendmsg(struct socket *sock, struct msghdr *msg, if (npages == 0) goto unlock_free; - if (npages > ARRAY_SIZE(ctx->sgl.sgl)) { - err = -ENOMEM; - ctx->sgl.sgt.sgl = - kvmalloc(array_size(npages, - sizeof(*ctx->sgl.sgt.sgl)), - GFP_KERNEL); - if (!ctx->sgl.sgt.sgl) - goto unlock_free; - } sg_init_table(ctx->sgl.sgl, npages); ctx->sgl.need_unpin = iov_iter_extract_will_pin(&msg->msg_iter); @@ -150,7 +158,9 @@ static int hash_sendmsg(struct socket *sock, struct msghdr *msg, af_alg_free_sg(&ctx->sgl); } +done_more: ctx->more = msg->msg_flags & MSG_MORE; +done: err = 0; unlock: release_sock(sk); @@ -158,6 +168,8 @@ unlock: unlock_free: af_alg_free_sg(&ctx->sgl); + hash_free_result(sk, ctx); + ctx->more = false; goto unlock; } |