NFS: Cleanup if nfs_match_client is interrupted

commit 9f7761cf0409465075dadb875d5d4b8ef2f890c8 upstream.

Don't bail out before cleaning up a new allocation if the wait for
searching for a matching nfs client is interrupted.  Memory leaks.

Reported-by: syzbot+7fe11b49c1cc30e3fce2@syzkaller.appspotmail.com
Fixes: 950a578c6128 ("NFS: make nfs_match_client killable")
Signed-off-by: NBenjamin Coddington <bcodding@redhat.com>
Signed-off-by: NTrond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

fs/nfs/client.c

@@ -416,10 +416,10 @@ struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init)
 		clp = nfs_match_client(cl_init);
 		if (clp) {
 			spin_unlock(&nn->nfs_client_lock);
-			if (IS_ERR(clp))
-				return clp;
 			if (new)
 				new->rpc_ops->free_client(new);
+			if (IS_ERR(clp))
+				return clp;
 			return nfs_found_client(cl_init, clp);
 		}
 		if (new) {