Re: Require mmap handler for a.out executables

From: Marcel Holtmann
Date: Thu Jul 27 2006 - 11:42:54 EST


Hi Linus,

> > > diff --git a/fs/binfmt_aout.c b/fs/binfmt_aout.c
> > > index f312103..5638acf 100644
> > > --- a/fs/binfmt_aout.c
> > > +++ b/fs/binfmt_aout.c
> > > @@ -278,6 +278,9 @@ static int load_aout_binary(struct linux
> > > return -ENOEXEC;
> > > }
> > >
> > > + if (!bprm->file->f_op || !bprm->file->f_op->mmap)
> > > + return -ENOEXEC;
> > > +
> >
> > These checks need a big comment explanining why they are there, else people
> > will remove them again by accident.
>
> Since we fixed the /proc problem in a different way, I decided that it
> might be best to leave the a.out stuff alone, at least for now. It is
> conceivable that somebody actually might be using executables on some
> strange filesystem that doesn't support mmap, although I can't for the
> moment think of any good reason.

what do think about giving this a spin in -mm for some time and see if
it will break for somebody.

Andrew, please include it.

Regards

Marcel


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