linux-kernel - Re: [PATCH ghak21 V2 3/4] audit: add refused symlink to audit

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Message-ID: <20180312155256.4j7uglv7jiyppozm@madcap2.tricolour.ca>
Date:   Mon, 12 Mar 2018 11:52:56 -0400
From:   Richard Guy Briggs <rgb@...hat.com>
To:     Paul Moore <paul@...l-moore.com>
Cc:     Linux-Audit Mailing List <linux-audit@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH ghak21 V2 3/4] audit: add refused symlink to audit_names

On 2018-03-12 11:53, Paul Moore wrote:
> On Mon, Mar 12, 2018 at 11:26 AM, Richard Guy Briggs <rgb@...hat.com> wrote:
> > On 2018-03-12 11:12, Paul Moore wrote:
> >> On Mon, Mar 12, 2018 at 2:31 AM, Richard Guy Briggs <rgb@...hat.com> wrote:
> >> > Audit link denied events for symlinks had duplicate PATH records rather
> >> > than just updating the existing PATH record.  Update the symlink's PATH
> >> > record with the current dentry and inode information.
> >> >
> >> > See: https://github.com/linux-audit/audit-kernel/issues/21
> >> > Signed-off-by: Richard Guy Briggs <rgb@...hat.com>
> >> > ---
> >> >  fs/namei.c | 1 +
> >> >  1 file changed, 1 insertion(+)
> >>
> >> Why didn't you include this in patch 4/4 like I asked during the
> >> previous review?
> >
> > Please see the last comment of:
> > https://www.redhat.com/archives/linux-audit/2018-March/msg00070.html
> 
> Yes, I just saw that ... I hadn't seen your replies on the v1 patches
> until I had finished reviewing v2.  I just replied to that mail in the
> v1 thread, but basically you need to figure out what is necessary here
> and let us know.  If I have to figure it out it likely isn't going to
> get done with enough soak time prior to the upcoming merge window.

Steve?  I was hoping you could chime in here.

I'd just include it for completeness unless Steve thinks it will stand
on its own and doesn't want the overhead.

> >> > diff --git a/fs/namei.c b/fs/namei.c
> >> > index 50d2533..00f5041 100644
> >> > --- a/fs/namei.c
> >> > +++ b/fs/namei.c
> >> > @@ -945,6 +945,7 @@ static inline int may_follow_link(struct nameidata *nd)
> >> >         if (nd->flags & LOOKUP_RCU)
> >> >                 return -ECHILD;
> >> >
> >> > +       audit_inode(nd->name, nd->stack[0].link.dentry, 0);
> >> >         audit_log_link_denied("follow_link", &nd->stack[0].link);
> >> >         return -EACCES;
> >> >  }
> >>
> >> paul moore
> >
> > - RGB
> 
> paul moore

- RGB

--
Richard Guy Briggs <rgb@...hat.com>
Sr. S/W Engineer, Kernel Security, Base Operating Systems
Remote, Ottawa, Red Hat Canada
IRC: rgb, SunRaycer
Voice: +1.647.777.2635, Internal: (81) 32635