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

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Message-ID: <CAHC9VhR-2tQAsDHDNto7GWkSrCLWGuURexxsxDxECfY9KoVvww@mail.gmail.com>
Date:   Mon, 12 Mar 2018 11:53:03 -0400
From:   Paul Moore <paul@...l-moore.com>
To:     Richard Guy Briggs <rgb@...hat.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 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.

>> > 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
>
> --
> 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



-- 
paul moore
www.paul-moore.com