Re: [PATCH] Remove READ_IMPLIES_EXEC during restart

[Oren Laadan <orenl-eQaUEPhvms7ENvBUuze7eA@public.gmane.org>]

Oren Laadan wrote:
> 
> Serge E. Hallyn wrote:
>> Quoting Dan Smith (danms-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org):
>>> On s390, all tasks have READ_IMPLIES_EXEC set in current->personality,
>>> which causes the restart process to map things like the stack and heap as
>>> executable.  During the restart process, remove this bit and restore the
>>> original personality afterwards.
>>>
>>> This seems a little ugly, but I don't know that there's a better place for
>>> it.
>> Well imo the only other thing to do would be to do the same thing but
>> just around the main restart_memory function.
>>
> 
> I second that. Added.
> 

In fact, if elsewhere we restore current->personality of the task,
then unless we move it to cr_read_mm(), it will overwrite it :(

Oren.