Re: [patch v2] epoll use a single inode ...

[Linus Torvalds]

On Mon, 5 Mar 2007, Davide Libenzi wrote:
> @@ -763,15 +767,17 @@
>  	 * using the inode number.
>  	 */
>  	error = -ENOMEM;
> -	sprintf(name, "[%lu]", inode->i_ino);
>  	this.name = name;
> -	this.len = strlen(name);
> -	this.hash = inode->i_ino;
> +	this.len = sprintf(name, "[%p]", ep);
> +	this.hash = 0;

Please don't expose kernel pointers to user space.

It's much better to do something like

	static unsigned int epoll_inode;

	this.len = sprintf(name, "[%u]", ++epoll_inode);

if you just need some pseudo-unique name to distinguish two epoll things 
from each other (vs from a dup'ed fd).

		Linus
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