Re: [PATCH] Introduce the pkill_on_warn boot parameter

[Steven Rostedt]

On Sat, 2 Oct 2021 18:04:10 +0000
Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote:

> > @@ -610,6 +611,9 @@ void __warn(const char *file, int line, void *caller, unsigned taint,
> >  
> >  	print_oops_end_marker();
> >  
> > +	if (pkill_on_warn && system_state >= SYSTEM_RUNNING)
> > +		do_group_exit(SIGKILL);
> > +  
> 
> Wait a sec...  do_group_exit() is very much not locking-neutral.
> Aren't you introducing a bunch of potential deadlocks by adding
> that?

Perhaps add an irq_work() here to trigger the do_group_exit() from a
"safe" interrupt context?

-- Steve