[RFC,ghak90,(was,ghak32),V3,05/10] audit: add containerid support for tty_audit

Submitted by Richard Guy Briggs on June 6, 2018, 4:58 p.m.

Details

Message ID 28ab8ad3c4e5de6f61b928eeb2af030b04a8820b.1528304204.git.rgb@redhat.com
State New
Series "audit: implement container identifier"
Headers show

Commit Message

Richard Guy Briggs June 6, 2018, 4:58 p.m.
Add audit container identifier auxiliary record to tty logging rule
event standalone records.

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
---
 drivers/tty/tty_audit.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Patch hide | download patch | download mbox

diff --git a/drivers/tty/tty_audit.c b/drivers/tty/tty_audit.c
index e30aa6b..66bd850 100644
--- a/drivers/tty/tty_audit.c
+++ b/drivers/tty/tty_audit.c
@@ -66,8 +66,9 @@  static void tty_audit_log(const char *description, dev_t dev,
 	uid_t uid = from_kuid(&init_user_ns, task_uid(tsk));
 	uid_t loginuid = from_kuid(&init_user_ns, audit_get_loginuid(tsk));
 	unsigned int sessionid = audit_get_sessionid(tsk);
+	struct audit_context *context = audit_alloc_local();
 
-	ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_TTY);
+	ab = audit_log_start(context, GFP_KERNEL, AUDIT_TTY);
 	if (ab) {
 		char name[sizeof(tsk->comm)];
 
@@ -80,6 +81,8 @@  static void tty_audit_log(const char *description, dev_t dev,
 		audit_log_n_hex(ab, data, size);
 		audit_log_end(ab);
 	}
+	audit_log_contid(context, "tty", audit_get_contid(tsk));
+	audit_free_context(context);
 }
 
 /**

Comments

Paul Moore July 20, 2018, 10:14 p.m.
On Wed, Jun 6, 2018 at 1:04 PM Richard Guy Briggs <rgb@redhat.com> wrote:
> Add audit container identifier auxiliary record to tty logging rule
> event standalone records.
>
> Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
> ---
>  drivers/tty/tty_audit.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/tty/tty_audit.c b/drivers/tty/tty_audit.c
> index e30aa6b..66bd850 100644
> --- a/drivers/tty/tty_audit.c
> +++ b/drivers/tty/tty_audit.c
> @@ -66,8 +66,9 @@ static void tty_audit_log(const char *description, dev_t dev,
>         uid_t uid = from_kuid(&init_user_ns, task_uid(tsk));
>         uid_t loginuid = from_kuid(&init_user_ns, audit_get_loginuid(tsk));
>         unsigned int sessionid = audit_get_sessionid(tsk);
> +       struct audit_context *context = audit_alloc_local();

We should be using current's audit_context in tty_audit_log().
Actually, we should probably just get rid of the tsk variable in
tty_audit_log() and use current directly to make things a bit more
obvious.

<time passes>

I did some digging and I have a two year old, half-baked patch that
cleans up this tsk/current usage as well as a few others.  I just
rebased it against audit/next and surprisingly it seems to pass a
basic smoke test (kernel boots and audit-testsuite passes); I'll post
it to the list as a RFC once I'm done reviewing these patches.

> -       ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_TTY);
> +       ab = audit_log_start(context, GFP_KERNEL, AUDIT_TTY);
>         if (ab) {
>                 char name[sizeof(tsk->comm)];
>
> @@ -80,6 +81,8 @@ static void tty_audit_log(const char *description, dev_t dev,
>                 audit_log_n_hex(ab, data, size);
>                 audit_log_end(ab);
>         }
> +       audit_log_contid(context, "tty", audit_get_contid(tsk));
> +       audit_free_context(context);
>  }

--
paul moore
www.paul-moore.com
Richard Guy Briggs July 24, 2018, 2:07 p.m.
On 2018-07-20 18:14, Paul Moore wrote:
> On Wed, Jun 6, 2018 at 1:04 PM Richard Guy Briggs <rgb@redhat.com> wrote:
> > Add audit container identifier auxiliary record to tty logging rule
> > event standalone records.
> >
> > Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
> > ---
> >  drivers/tty/tty_audit.c | 5 ++++-
> >  1 file changed, 4 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/tty/tty_audit.c b/drivers/tty/tty_audit.c
> > index e30aa6b..66bd850 100644
> > --- a/drivers/tty/tty_audit.c
> > +++ b/drivers/tty/tty_audit.c
> > @@ -66,8 +66,9 @@ static void tty_audit_log(const char *description, dev_t dev,
> >         uid_t uid = from_kuid(&init_user_ns, task_uid(tsk));
> >         uid_t loginuid = from_kuid(&init_user_ns, audit_get_loginuid(tsk));
> >         unsigned int sessionid = audit_get_sessionid(tsk);
> > +       struct audit_context *context = audit_alloc_local();
> 
> We should be using current's audit_context in tty_audit_log().
> Actually, we should probably just get rid of the tsk variable in
> tty_audit_log() and use current directly to make things a bit more
> obvious.

Ok, agreed.  At this point, it it current passed in anyways so no harm
other than efficiency.

> <time passes>
> 
> I did some digging and I have a two year old, half-baked patch that
> cleans up this tsk/current usage as well as a few others.  I just
> rebased it against audit/next and surprisingly it seems to pass a
> basic smoke test (kernel boots and audit-testsuite passes); I'll post
> it to the list as a RFC once I'm done reviewing these patches.

I'll leave this patch the way it is since there should be no difference
and trust this other patch will work its way through the system and
solve that.

> > -       ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_TTY);
> > +       ab = audit_log_start(context, GFP_KERNEL, AUDIT_TTY);
> >         if (ab) {
> >                 char name[sizeof(tsk->comm)];
> >
> > @@ -80,6 +81,8 @@ static void tty_audit_log(const char *description, dev_t dev,
> >                 audit_log_n_hex(ab, data, size);
> >                 audit_log_end(ab);
> >         }
> > +       audit_log_contid(context, "tty", audit_get_contid(tsk));
> > +       audit_free_context(context);
> >  }
> 
> --
> paul moore
> www.paul-moore.com

- RGB

--
Richard Guy Briggs <rgb@redhat.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 July 24, 2018, 8:36 p.m.
On Tue, Jul 24, 2018 at 10:10 AM Richard Guy Briggs <rgb@redhat.com> wrote:
> On 2018-07-20 18:14, Paul Moore wrote:
> > On Wed, Jun 6, 2018 at 1:04 PM Richard Guy Briggs <rgb@redhat.com> wrote:
> > > Add audit container identifier auxiliary record to tty logging rule
> > > event standalone records.
> > >
> > > Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
> > > ---
> > >  drivers/tty/tty_audit.c | 5 ++++-
> > >  1 file changed, 4 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/tty/tty_audit.c b/drivers/tty/tty_audit.c
> > > index e30aa6b..66bd850 100644
> > > --- a/drivers/tty/tty_audit.c
> > > +++ b/drivers/tty/tty_audit.c
> > > @@ -66,8 +66,9 @@ static void tty_audit_log(const char *description, dev_t dev,
> > >         uid_t uid = from_kuid(&init_user_ns, task_uid(tsk));
> > >         uid_t loginuid = from_kuid(&init_user_ns, audit_get_loginuid(tsk));
> > >         unsigned int sessionid = audit_get_sessionid(tsk);
> > > +       struct audit_context *context = audit_alloc_local();
> >
> > We should be using current's audit_context in tty_audit_log().
> > Actually, we should probably just get rid of the tsk variable in
> > tty_audit_log() and use current directly to make things a bit more
> > obvious.
>
> Ok, agreed.  At this point, it it current passed in anyways so no harm
> other than efficiency.
>
> > <time passes>
> >
> > I did some digging and I have a two year old, half-baked patch that
> > cleans up this tsk/current usage as well as a few others.  I just
> > rebased it against audit/next and surprisingly it seems to pass a
> > basic smoke test (kernel boots and audit-testsuite passes); I'll post
> > it to the list as a RFC once I'm done reviewing these patches.
>
> I'll leave this patch the way it is since there should be no difference
> and trust this other patch will work its way through the system and
> solve that.

Yep, that's a merge issue I'll deal with when we get to that point.
Although, I would expect that when you post an updated patchset that
it applies cleanly to the then-current audit/next tree (or Linus'
tree, but audit/next is preferable).  In other words, please rebase
your development branch before doing your final dev testing and
posting.

> > > -       ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_TTY);
> > > +       ab = audit_log_start(context, GFP_KERNEL, AUDIT_TTY);
> > >         if (ab) {
> > >                 char name[sizeof(tsk->comm)];
> > >
> > > @@ -80,6 +81,8 @@ static void tty_audit_log(const char *description, dev_t dev,
> > >                 audit_log_n_hex(ab, data, size);
> > >                 audit_log_end(ab);
> > >         }
> > > +       audit_log_contid(context, "tty", audit_get_contid(tsk));
> > > +       audit_free_context(context);
> > >  }
> >
> > --
> > paul moore
> > www.paul-moore.com
>
> - RGB
>
> --
> Richard Guy Briggs <rgb@redhat.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