static void nfs4_locku_prepare(struct rpc_task *task, void *data)
{
	struct nfs4_unlockdata *calldata = data;

	if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
		return;
	if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
		/* Note: exit _without_ running nfs4_locku_done */
		task->tk_action = NULL;
		return;
	}
	calldata->timestamp = jiffies;
	if (nfs4_setup_sequence(calldata->server,
				&calldata->arg.seq_args,
				&calldata->res.seq_res,
				task) != 0)
		nfs_release_seqid(calldata->arg.seqid);
	else
		rpc_call_start(task);
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.