From cbdad1f246dd98e6c9c32a6e5212337f542aa7e0 Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Fri, 31 Jul 2020 17:03:50 +1000
Subject: [PATCH] crypto: algif_aead - Do not set MAY_BACKLOG on the async path
Git-commit: cbdad1f246dd98e6c9c32a6e5212337f542aa7e0
Patch-mainline: v5.10-rc1
References: git-fixes
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.
Fixes: 83094e5e9e49 ("crypto: af_alg - add async support to...")
Cc: <stable@vger.kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
crypto/algif_aead.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/crypto/algif_aead.c b/crypto/algif_aead.c
index 54f2fb2c6535..42493b4d8ce4 100644
--- a/crypto/algif_aead.c
+++ b/crypto/algif_aead.c
@@ -78,7 +78,7 @@ static int crypto_aead_copy_sgl(struct crypto_sync_skcipher *null_tfm,
SYNC_SKCIPHER_REQUEST_ON_STACK(skreq, null_tfm);
skcipher_request_set_sync_tfm(skreq, null_tfm);
- skcipher_request_set_callback(skreq, CRYPTO_TFM_REQ_MAY_BACKLOG,
+ skcipher_request_set_callback(skreq, CRYPTO_TFM_REQ_MAY_SLEEP,
NULL, NULL);
skcipher_request_set_crypt(skreq, src, dst, len, NULL);
@@ -291,19 +291,20 @@ static int _aead_recvmsg(struct socket *sock, struct msghdr *msg,
areq->outlen = outlen;
aead_request_set_callback(&areq->cra_u.aead_req,
- CRYPTO_TFM_REQ_MAY_BACKLOG,
+ CRYPTO_TFM_REQ_MAY_SLEEP,
af_alg_async_cb, areq);
err = ctx->enc ? crypto_aead_encrypt(&areq->cra_u.aead_req) :
crypto_aead_decrypt(&areq->cra_u.aead_req);
/* AIO operation in progress */
- if (err == -EINPROGRESS || err == -EBUSY)
+ if (err == -EINPROGRESS)
return -EIOCBQUEUED;
sock_put(sk);
} else {
/* Synchronous operation */
aead_request_set_callback(&areq->cra_u.aead_req,
+ CRYPTO_TFM_REQ_MAY_SLEEP |
CRYPTO_TFM_REQ_MAY_BACKLOG,
crypto_req_done, &ctx->wait);
err = crypto_wait_req(ctx->enc ?
--
2.16.4