int splice_from_pipe_feed(struct pipe_inode_info *pipe, struct splice_desc *sd,
			  splice_actor *actor)
{
	int ret;

	while (pipe->nrbufs) {
		struct pipe_buffer *buf = pipe->bufs + pipe->curbuf;
		const struct pipe_buf_operations *ops = buf->ops;

		sd->len = buf->len;
		if (sd->len > sd->total_len)
			sd->len = sd->total_len;

		ret = buf->ops->confirm(pipe, buf);
		if (unlikely(ret)) {
			if (ret == -ENODATA)
				ret = 0;
			return ret;
		}

		ret = actor(pipe, buf, sd);
		if (ret <= 0)
			return ret;

		buf->offset += ret;
		buf->len -= ret;

		sd->num_spliced += ret;
		sd->len -= ret;
		sd->pos += ret;
		sd->total_len -= ret;

		if (!buf->len) {
			buf->ops = NULL;
			ops->release(pipe, buf);
			pipe->curbuf = (pipe->curbuf + 1) & (pipe->buffers - 1);
			pipe->nrbufs--;
			if (pipe->files)
				sd->need_wakeup = true;
		}

		if (!sd->total_len)
			return 0;
	}

	return 1;
}

This category addresses vulnerabilities caused by flawed access control mechanisms, where incorrect permission settings allow unauthorized users to access restricted resources.