Bug#503162: libc6: Doubt with nptl

[Aurelien Jarno <aurelien@aurel32.net>]

On Thu, Oct 23, 2008 at 07:41:47PM +0700, Alexey Salmin wrote:
> > Freeing a variable...
> >
> > >       if (err = pthread_rwlock_unlock(q->data->rwlock)) {
> >
> > ...and using it later is never a good idea. This is a problem in your
> > program, closing the bug.
> 
> 
> ? Can you please explain where am I freeing a variable? AFAIK

Quoting your code:

	free(q);
	if (err = pthread_rwlock_unlock(q->data->rwlock)) {

q is freed, and then use as an argument to pthread_rwlock_unlock().

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