On 2018-07-20 18:14, Paul Moore wrote:

On Wed, Jun 6, 2018 at 1:04 PM Richard Guy Briggs [off-list ref] wrote:

quoted

Add audit container identifier auxiliary record to tty logging rule
event standalone records.

Signed-off-by: Richard Guy Briggs <redacted>
---
 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.

quoted

-       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 [off-list ref]
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