nfsd: fix compound state allocation error handling

Move the cstate_alloc call so that if it fails, the response is setup to
encode the NFS error. The out label now means that the
nfsd4_compound_state has not been allocated.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

fs/nfsd/nfs4proc.c

@@ -867,11 +867,6 @@ nfsd4_proc_compound(struct svc_rqst *rqstp,
 	int		slack_bytes;
 	__be32		status;
 
-	status = nfserr_resource;
-	cstate = cstate_alloc();
-	if (cstate == NULL)
-		goto out;
-
 	resp->xbuf = &rqstp->rq_res;
 	resp->p = rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len;
 	resp->tagp = resp->p;
@@ -890,6 +885,11 @@ nfsd4_proc_compound(struct svc_rqst *rqstp,
 	if (args->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
 		goto out;
 
+	status = nfserr_resource;
+	cstate = cstate_alloc();
+	if (cstate == NULL)
+		goto out;
+
 	status = nfs_ok;
 	while (!status && resp->opcnt < args->opcnt) {
 		op = &args->ops[resp->opcnt++];
@@ -957,9 +957,9 @@ nfsd4_proc_compound(struct svc_rqst *rqstp,
 		nfsd4_increment_op_stats(op->opnum);
 	}
 
+	cstate_free(cstate);
 out:
 	nfsd4_release_compoundargs(args);
-	cstate_free(cstate);
 	dprintk("nfsv4 compound returned %d\n", ntohl(status));
 	return status;
 }