linux-kernel - [PATCH v2] crypto: hisilicon - Kunpeng916 crypto driver don't sleep when in softirq

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 30 Jun 2022 20:42:30 +0800
From:   Zhengchao Shao <shaozhengchao@...wei.com>
To:     <linux-crypto@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <herbert@...dor.apana.org.au>, <davem@...emloft.net>
CC:     <weiyongjun1@...wei.com>, <yuehaibing@...wei.com>,
        <shaozhengchao@...wei.com>
Subject: [PATCH v2] crypto: hisilicon - Kunpeng916 crypto driver don't sleep when in softirq

When kunpeng916 encryption driver is used to deencrypt and decrypt
packets during the softirq, it is not allowed to use mutex lock.

v1: use spin_lock will cause soft lockup

Signed-off-by: Zhengchao Shao <shaozhengchao@...wei.com>
---
 drivers/crypto/hisilicon/sec/sec_algs.c | 14 +++++++-------
 drivers/crypto/hisilicon/sec/sec_drv.h  |  2 +-
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/crypto/hisilicon/sec/sec_algs.c b/drivers/crypto/hisilicon/sec/sec_algs.c
index 0a3c8f019b02..490e1542305e 100644
--- a/drivers/crypto/hisilicon/sec/sec_algs.c
+++ b/drivers/crypto/hisilicon/sec/sec_algs.c
@@ -449,7 +449,7 @@ static void sec_skcipher_alg_callback(struct sec_bd_info *sec_resp,
 		 */
 	}
 
-	mutex_lock(&ctx->queue->queuelock);
+	spin_lock_bh(&ctx->queue->queuelock);
 	/* Put the IV in place for chained cases */
 	switch (ctx->cipher_alg) {
 	case SEC_C_AES_CBC_128:
@@ -509,7 +509,7 @@ static void sec_skcipher_alg_callback(struct sec_bd_info *sec_resp,
 			list_del(&backlog_req->backlog_head);
 		}
 	}
-	mutex_unlock(&ctx->queue->queuelock);
+	spin_unlock_bh(&ctx->queue->queuelock);
 
 	mutex_lock(&sec_req->lock);
 	list_del(&sec_req_el->head);
@@ -798,7 +798,7 @@ static int sec_alg_skcipher_crypto(struct skcipher_request *skreq,
 	 */
 
 	/* Grab a big lock for a long time to avoid concurrency issues */
-	mutex_lock(&queue->queuelock);
+	spin_lock_bh(&queue->queuelock);
 
 	/*
 	 * Can go on to queue if we have space in either:
@@ -814,15 +814,15 @@ static int sec_alg_skcipher_crypto(struct skcipher_request *skreq,
 		ret = -EBUSY;
 		if ((skreq->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) {
 			list_add_tail(&sec_req->backlog_head, &ctx->backlog);
-			mutex_unlock(&queue->queuelock);
+			spin_unlock_bh(&queue->queuelock);
 			goto out;
 		}
 
-		mutex_unlock(&queue->queuelock);
+		spin_unlock_bh(&queue->queuelock);
 		goto err_free_elements;
 	}
 	ret = sec_send_request(sec_req, queue);
-	mutex_unlock(&queue->queuelock);
+	spin_unlock_bh(&queue->queuelock);
 	if (ret)
 		goto err_free_elements;
 
@@ -881,7 +881,7 @@ static int sec_alg_skcipher_init(struct crypto_skcipher *tfm)
 	if (IS_ERR(ctx->queue))
 		return PTR_ERR(ctx->queue);
 
-	mutex_init(&ctx->queue->queuelock);
+	spin_lock_init(&ctx->queue->queuelock);
 	ctx->queue->havesoftqueue = false;
 
 	return 0;
diff --git a/drivers/crypto/hisilicon/sec/sec_drv.h b/drivers/crypto/hisilicon/sec/sec_drv.h
index 179a8250d691..e2a50bf2234b 100644
--- a/drivers/crypto/hisilicon/sec/sec_drv.h
+++ b/drivers/crypto/hisilicon/sec/sec_drv.h
@@ -347,7 +347,7 @@ struct sec_queue {
 	DECLARE_BITMAP(unprocessed, SEC_QUEUE_LEN);
 	DECLARE_KFIFO_PTR(softqueue, typeof(struct sec_request_el *));
 	bool havesoftqueue;
-	struct mutex queuelock;
+	spinlock_t queuelock;
 	void *shadow[SEC_QUEUE_LEN];
 };
 
-- 
2.17.1