Re: [PATCH 0/3] coredump: fix the ancient signal problems

From: Oleg Nesterov
Date: Sun Feb 17 2013 - 15:02:54 EST

On 02/17, Oleg Nesterov wrote:
> On 02/17, Linus Torvalds wrote:
> >
> > SIGKILL really is very very special. Having it kill a
> > coredump in progress sounds fine to me.
> Great.

Forgot to mention just in case...

We could probably make a simpler patch. do_coredump() can ignore
all signals except SIGKILL from the start. But when I suggested
this change in the past I was told that the dump handler looks
(or may look) at /proc/pid/status so we shouldn't do this.

And instead of s/SIGNAL_GROUP_EXIT/group_exit_task/ in 2/3 we
could add the ugly but simple checks in __send_signal() paths.
Say we could rely on PF_DUMPCORE (which btw asks for cleanup

However, I think that using ->group_exit_task is better (if
correct!) and simply more logical.


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