From: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
Date: Tue, 26 Jul 2022 10:56:32 +0800
Subject: nvmet-auth: use kmemdup instead of kmalloc + memcpy
Patch-mainline: v6.0-rc1
Git-commit: 14446f9abd609791064d222ccf3c7b3af1772358
References: jsc#PED-1183

For code neat purpose, we can use kmemdup to replace
kmalloc + memcpy.

Signed-off-by: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
 drivers/nvme/target/fabrics-cmd-auth.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/nvme/target/fabrics-cmd-auth.c
+++ b/drivers/nvme/target/fabrics-cmd-auth.c
@@ -160,10 +160,10 @@ static u16 nvmet_auth_reply(struct nvmet
 	pr_debug("%s: ctrl %d qid %d host authenticated\n",
 		 __func__, ctrl->cntlid, req->sq->qid);
 	if (data->cvalid) {
-		req->sq->dhchap_c2 = kmalloc(data->hl, GFP_KERNEL);
+		req->sq->dhchap_c2 = kmemdup(data->rval + data->hl, data->hl,
+					     GFP_KERNEL);
 		if (!req->sq->dhchap_c2)
 			return NVME_AUTH_DHCHAP_FAILURE_FAILED;
-		memcpy(req->sq->dhchap_c2, data->rval + data->hl, data->hl);
 
 		pr_debug("%s: ctrl %d qid %d challenge %*ph\n",
 			 __func__, ctrl->cntlid, req->sq->qid, data->hl,