Bug#637206: linux-image-3.0.0-1-amd64: zombie after running iceweasel under valgrind

[Jonathan Nieder <jrnieder@gmail.com>]

Vincent Lefevre wrote:

> In short: I've got a zombie process child of init. I suppose that's
> a kernel bug.

Something's seriously weird there, but isn't this currently phrased as
an init bug (i.e., "init" is not successfully waiting on its child)?

[...]
> xvii:~> ps -ft pts/8
> UID        PID  PPID  C STIME TTY          TIME CMD
> vinc17    8032 23516 22 14:38 pts/8    00:02:33 [memcheck-amd64-] <defunct>
> vinc17   23516 23512  0 11:29 pts/8    00:00:00 zsh
>
> and process 8032 is the only child of zsh. A strace on the zsh
> process just shows:
>
> rt_sigsuspend([INT]
>
> Then I did a "kill -9 23516". The zsh process died as expected, but
> the zombie is still there, now a child of init.

At least, I think that could be a good place to start investigating.
What init do you use?