Re: [PATCH -mm 3/4][AIO] - AIO completion signal notification

[Andrew Morton]

On Thu, 23 Nov 2006 09:28:05 +0100
Sébastien Dugué <sebastien.dugue@xxxxxxxx> wrote:

> > > +	if (notify->notify == (SIGEV_SIGNAL|SIGEV_THREAD_ID)) {
> > > +		/*
> > > +		 * This reference will be dropped in really_put_req() when
> > > +		 * we're done with the request.
> > > +		 */
> > > +		get_task_struct(target);
> > > +	}
> > 
> > It worries me that this function can save away a task_struct* without
> > having taken a reference against it.
> > 
> 
>   OK. Does moving 'notify->target = target;' after the get_task_struct() will
> do, or am I missing something more subtle?

Well it's your code - you tell me ;)

It is unsafe (and rather pointless) to be saving the address of some structure
which can be freed at any time.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/