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Re: [anton@samba.org: [PATCH]: Bug in ppc32 ld.so]


> Date: Mon, 15 Jul 2002 15:55:56 -0700
> From: Anton Blanchard <anton@samba.org>

> > > the kernel does not have to icache synchronise a zero filled page
> > > when handing it out to a process,
> > 
> > Yes, it does.  To not do this violates process isolation.  What if
> > there was sensitive information embedded in the code in the old page
> > (eg. encryption keys that have been compiled into a program)?
> 
> Ignore that bit, we are icache syncronising zero filled pages in the
> kernel. What I am arguing is that we also need to do the full dcbst...icbi
> sequence in ld.so, do you agree?

No, I don't agree, you haven't given any reason why ld.so should do this.

-- 
- Geoffrey Keating <geoffk@geoffk.org> <geoffk@redhat.com>


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