xprtrdma: Fix regbuf data not freed in rpcrdma_req_create()

jira LE-1907
Rebuild_History Non-Buildable kernel-5.14.0-284.30.1.el9_2
commit-author Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
commit 9181f40

If rdma receive buffer allocate failed, should call rpcrdma_regbuf_free()
to free the send buffer, otherwise, the buffer data will be leaked.

Fixes: bb93a1a ("xprtrdma: Allocate req's regbufs at xprt create time")
	Signed-off-by: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
	Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
(cherry picked from commit 9181f40)
	Signed-off-by: Jonathan Maple <jmaple@ciq.com>

Author: PlaidCat

net/sunrpc/xprtrdma/verbs.c

@@ -834,7 +834,7 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
 	return req;
 
 out3:
-	kfree(req->rl_sendbuf);
+	rpcrdma_regbuf_free(req->rl_sendbuf);
 out2:
 	kfree(req);
 out1: