Re: [PATCH RFC] perf_event: Add support for LSM and SELinux checks

[Joel Fernandes <joel@joelfernandes.org>]

On Thu, Oct 10, 2019 at 09:11:39AM +1100, James Morris wrote:
> On Wed, 9 Oct 2019, Joel Fernandes (Google) wrote:
> 
> >  
> > +#ifdef CONFIG_SECURITY
> > +	err = security_perf_event_alloc(event);
> > +	if (err)
> > +		goto err_security;
> > +#endif
> 
> You should not need this ifdef.

Fixed.

> > diff --git a/security/security.c b/security/security.c
> > index 1bc000f834e2..7639bca1db59 100644
> > --- a/security/security.c
> > +++ b/security/security.c
> > @@ -2373,26 +2373,32 @@ int security_bpf(int cmd, union bpf_attr *attr, unsigned int size)
> >  {
> >  	return call_int_hook(bpf, 0, cmd, attr, size);
> >  }
> > +
> >  int security_bpf_map(struct bpf_map *map, fmode_t fmode)
> >  {
> >  	return call_int_hook(bpf_map, 0, map, fmode);
> >  }
> > +
> >  int security_bpf_prog(struct bpf_prog *prog)
> >  {
> >  	return call_int_hook(bpf_prog, 0, prog);
> >  }
> > +
> >  int security_bpf_map_alloc(struct bpf_map *map)
> >  {
> >  	return call_int_hook(bpf_map_alloc_security, 0, map);
> >  }
> > +
> >  int security_bpf_prog_alloc(struct bpf_prog_aux *aux)
> >  {
> >  	return call_int_hook(bpf_prog_alloc_security, 0, aux);
> >  }
> > +
> >  void security_bpf_map_free(struct bpf_map *map)
> >  {
> >  	call_void_hook(bpf_map_free_security, map);
> >  }
> > +
> >  void security_bpf_prog_free(struct bpf_prog_aux *aux)
> >  {
> >  	call_void_hook(bpf_prog_free_security, aux);
> > @@ -2404,3 +2410,30 @@ int security_locked_down(enum lockdown_reason what)
> >  	return call_int_hook(locked_down, 0, what);
> >  }
> >  EXPORT_SYMBOL(security_locked_down);
> 
> Please avoid unrelated whitespace changes.

The author of the BPF security hooks forgot to add a newline between function
definitions and I was just cleaning the style issue since it is very close to
the parts I touched. But I will drop it from the patch per your suggestion.

thanks,

 - Joel