crypto: hisilicon-hpre add req check when callback

hulk inclusion
category: Bugfix
bugzilla: NA
CVE: NA

When running the hpre kernel state task, a ras error occurred.
After the driver actively called back the incomplete task to
recycle the sqe resources, the hardware wrote back the sqe and
caused the kernel calltrace.
Signed-off-by: NYu'an Wang <wangyuan46@huawei.com>
Signed-off-by: NHui Tang <tanghui20@huawei.com>
Reviewed-by: NZibo Xu <xuzaibo@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

drivers/crypto/hisilicon/hpre/hpre.h

@@ -32,6 +32,7 @@ enum hpre_dfx_dbgfs_file {
 	HPRE_SEND_BUSY_CNT,
 	HPRE_OVER_THRHLD_CNT,
 	HPRE_OVERTIME_THRHLD,
+	HPRE_INVALID_REQ_CNT,
 	HPRE_DFX_FILE_NUM
 };
 

drivers/crypto/hisilicon/hpre/hpre_crypto.c

@@ -414,9 +414,17 @@ static void hpre_rsa_cb(struct hpre_ctx *ctx, void *resp)
 static void hpre_alg_cb(struct hisi_qp *qp, void *resp)
 {
 	struct hpre_ctx *ctx = qp->qp_ctx;
+	struct hpre_dfx *dfx = ctx->hpre->debug.dfx;
 	struct hpre_sqe *sqe = resp;
+	struct hpre_asym_request *req = ctx->req_list[le16_to_cpu(sqe->tag)];
+
+
+	if (unlikely(!req)) {
+		atomic64_inc(&dfx[HPRE_INVALID_REQ_CNT].value);
+		return;
+	}
 
-	ctx->req_list[le16_to_cpu(sqe->tag)]->cb(ctx, resp);
+	req->cb(ctx, resp);
 }
 
 static int hpre_ctx_init(struct hpre_ctx *ctx)

drivers/crypto/hisilicon/hpre/hpre_main.c

@@ -178,7 +178,8 @@ static const char *hpre_dfx_files[HPRE_DFX_FILE_NUM] = {
 	"send_fail_cnt",
 	"send_busy_cnt",
 	"over_thrhld_cnt",
-	"overtime_thrhld"
+	"overtime_thrhld",
+	"invalid_req_cnt"
 };
 
 #ifdef CONFIG_CRYPTO_QM_UACCE