Re: Bug in mask_proc (repost)

John Ogness wrote:
> Probably a good (and efficient) fix would be to have check_recursion()
> set a "removed" flag in the process structure. That way, open_file()
> could very easily see if it has been removed or not. In my opinion,
> that is much better than relying on the return value of dentry_open().
>
> Rather than:
>
> ec->file = dentry_open(dget(evt->dentry), mntget(evt->mnt),
>                        O_RDONLY | O_LARGEFILE, current_cred());
> if (IS_ERR(ec->file)) {
>         check_recursion();  /* remove myself from proc_list */
>         ret = PTR_ERR(ec->file);
>         goto error_out2;
> }
>
> the code could look like this:
>
> ec->file = dentry_open(dget(evt->dentry), mntget(evt->mnt),
>                        O_RDONLY | O_LARGEFILE, current_cred());
> if (!proc.removed)
>         check_recursion();  /* remove myself from proc_list */
> if (IS_ERR(ec->file)) {
>         ret = PTR_ERR(ec->file);
>         goto error_out2;
> }
>
> John Ogness
>
>   
And what about the solution I suggested to avoid the whole
recursion thing (by simply passing _lower_ dentry and mount
to dazukofs_open()).
Do you (or someone else) see any problems with that?


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