Re: [regression, 2.6.37-rc1] 'ip link tap0 up' stuck in do_exit()

Eric Dumazet
2010-12-09T17:07:54Z

Le vendredi 10 décembre 2010 à 00:47 +0800, Américo Wang a écrit :

> Yeah, there is no point that a zombie can trigger a BUG_ON in kenrel.
> But it is still interesting to know why it becomes a zombie...
>

A zombie is very easy to get.

Technically speaking, all processes die and become zombies, unless
parent said : signal(SIGCLD, SIG_IGN) before fork()

The parent is buggy (sudo in this case ?) and doesnt call wait() to
'free' one of its children.