Re: [PATCH v2 2.6.38-rc8-tip 5/20] 5: Uprobes: register/unregister probes.

Steven Rostedt
2011-03-14T16:00:38Z

On Mon, 2011-03-14 at 19:04 +0530, Srikar Dronamraju wrote:
> +/* Returns 0 if it can install one probe */
> +int register_uprobe(struct inode *inode, loff_t offset,
> + struct uprobe_consumer *consumer)
> +{
> + struct prio_tree_iter iter;
> + struct list_head tmp_list;
> + struct address_space *mapping;
> + struct mm_struct *mm, *tmpmm;
> + struct vm_area_struct *vma;
> + struct uprobe *uprobe;
> + int ret = -1;
> +
> + if (!inode || !consumer || consumer->next)
> + return -EINVAL;
> + uprobe = uprobes_add(inode, offset);

What happens if uprobes_add() returns NULL?

-- Steve

> + INIT_LIST_HEAD(&tmp_list);
> +
> + mapping = inode->i_mapping;
> +
> + mutex_lock(&uprobes_mutex);
> + if (uprobe->consumers) {
> + ret = 0;
> + goto consumers_add;
> + }