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From: Richard Guy Briggs <rgb@redhat.com>
To: containers@lists.linux-foundation.org, linux-api@vger.kernel.org,
	Linux-Audit Mailing List <linux-audit@redhat.com>,
	linux-fsdevel@vger.kernel.org,
	LKML <linux-kernel@vger.kernel.org>,
	netdev@vger.kernel.org, netfilter-devel@vger.kernel.org
Cc: Paul Moore <paul@paul-moore.com>,
	sgrubb@redhat.com, omosnace@redhat.com, dhowells@redhat.com,
	simo@redhat.com, eparis@parisplace.org, serge@hallyn.com,
	ebiederm@xmission.com, nhorman@tuxdriver.com, dwalsh@redhat.com,
	mpatel@redhat.com, Richard Guy Briggs <rgb@redhat.com>
Subject: [PATCH ghak90 V7 05/21] audit: log drop of contid on exit of last task
Date: Wed, 18 Sep 2019 21:22:22 -0400
Message-ID: <71b75f54342f32f176c2b6d94584f2a666964e68.1568834524.git.rgb@redhat.com> (raw)
In-Reply-To: <cover.1568834524.git.rgb@redhat.com>
In-Reply-To: <cover.1568834524.git.rgb@redhat.com>

Since we are tracking the life of each audit container indentifier, we
can match the creation event with the destruction event.  Log the
destruction of the audit container identifier when the last process in
that container exits.

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
---
 kernel/audit.c   | 32 ++++++++++++++++++++++++++++++++
 kernel/audit.h   |  2 ++
 kernel/auditsc.c |  2 ++
 3 files changed, 36 insertions(+)

diff --git a/kernel/audit.c b/kernel/audit.c
index ea0899130cc1..53d13d638c63 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -2503,6 +2503,38 @@ int audit_set_contid(struct task_struct *task, u64 contid)
 	return rc;
 }
 
+void audit_log_container_drop(void)
+{
+	struct audit_buffer *ab;
+	uid_t uid;
+	struct tty_struct *tty;
+	char comm[sizeof(current->comm)];
+
+	if (!current->audit || !current->audit->cont ||
+	    refcount_read(&current->audit->cont->refcount) > 1)
+		return;
+	ab = audit_log_start(audit_context(), GFP_KERNEL, AUDIT_CONTAINER_OP);
+	if (!ab)
+		return;
+
+	uid = from_kuid(&init_user_ns, task_uid(current));
+	tty = audit_get_tty();
+	audit_log_format(ab,
+			 "op=drop opid=%d contid=%llu old-contid=%llu pid=%d uid=%u auid=%u tty=%s ses=%u",
+			 task_tgid_nr(current), audit_get_contid(current),
+			 audit_get_contid(current), task_tgid_nr(current), uid,
+			 from_kuid(&init_user_ns, audit_get_loginuid(current)),
+			 tty ? tty_name(tty) : "(none)",
+       			 audit_get_sessionid(current));
+	audit_put_tty(tty);
+	audit_log_task_context(ab);
+	audit_log_format(ab, " comm=");
+	audit_log_untrustedstring(ab, get_task_comm(comm, current));
+	audit_log_d_path_exe(ab, current->mm);
+	audit_log_format(ab, " res=1");
+	audit_log_end(ab);
+}
+
 /**
  * audit_log_end - end one audit record
  * @ab: the audit_buffer
diff --git a/kernel/audit.h b/kernel/audit.h
index e4a31aa92dfe..162de8366b32 100644
--- a/kernel/audit.h
+++ b/kernel/audit.h
@@ -255,6 +255,8 @@ extern void audit_log_d_path_exe(struct audit_buffer *ab,
 extern struct tty_struct *audit_get_tty(void);
 extern void audit_put_tty(struct tty_struct *tty);
 
+extern void audit_log_container_drop(void);
+
 /* audit watch/mark/tree functions */
 #ifdef CONFIG_AUDITSYSCALL
 extern unsigned int audit_serial(void);
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 0e2d50533959..bd855794ad26 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1568,6 +1568,8 @@ static void audit_log_exit(void)
 
 	audit_log_proctitle();
 
+	audit_log_container_drop();
+
 	/* Send end of event record to help user space know we are finished */
 	ab = audit_log_start(context, GFP_KERNEL, AUDIT_EOE);
 	if (ab)
-- 
1.8.3.1


  parent reply index

Thread overview: 69+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-19  1:22 [PATCH ghak90 V7 00/21] audit: implement container identifier Richard Guy Briggs
2019-09-19  1:22 ` [PATCH ghak90 V7 01/21] audit: collect audit task parameters Richard Guy Briggs
2019-09-19  1:22 ` [PATCH ghak90 V7 02/21] audit: add container id Richard Guy Briggs
2019-09-19  1:22 ` [PATCH ghak90 V7 03/21] audit: read container ID of a process Richard Guy Briggs
2019-09-19  1:22 ` [PATCH ghak90 V7 04/21] audit: convert to contid list to check for orch/engine ownership Richard Guy Briggs
2019-09-26 14:46   ` Neil Horman
2019-10-25 20:00     ` Richard Guy Briggs
2019-10-28 12:20       ` Neil Horman
2019-10-11  0:38   ` Paul Moore
2019-10-25 21:00     ` Richard Guy Briggs
2019-11-08 18:26       ` Paul Moore
2019-09-19  1:22 ` Richard Guy Briggs [this message]
2019-10-11  0:38   ` [PATCH ghak90 V7 05/21] audit: log drop of contid on exit of last task Paul Moore
2019-10-25 19:43     ` Richard Guy Briggs
2019-09-19  1:22 ` [PATCH ghak90 V7 06/21] audit: contid limit of 32k imposed to avoid DoS Richard Guy Briggs
2019-09-27 12:51   ` Neil Horman
2019-10-11  0:38     ` Paul Moore
2019-10-24 21:23       ` Richard Guy Briggs
2019-11-08 17:49         ` Paul Moore
2019-10-25 20:15     ` Richard Guy Briggs
2019-09-19  1:22 ` [PATCH ghak90 V7 07/21] audit: log container info of syscalls Richard Guy Briggs
2019-09-19  1:22 ` [PATCH ghak90 V7 08/21] audit: add contid support for signalling the audit daemon Richard Guy Briggs
2019-10-11  0:39   ` Paul Moore
2019-10-25 19:20     ` Richard Guy Briggs
2019-11-08 17:41       ` Paul Moore
2019-09-19  1:22 ` [PATCH ghak90 V7 09/21] audit: add support for non-syscall auxiliary records Richard Guy Briggs
2019-09-19  1:22 ` [PATCH ghak90 V7 10/21] audit: add containerid support for user records Richard Guy Briggs
2019-09-19  1:22 ` [PATCH ghak90 V7 11/21] audit: add containerid filtering Richard Guy Briggs
2019-09-19  1:22 ` [PATCH ghak90 V7 12/21] audit: add support for containerid to network namespaces Richard Guy Briggs
2019-10-11  0:39   ` Paul Moore
2019-09-19  1:22 ` [PATCH ghak90 V7 13/21] audit: NETFILTER_PKT: record each container ID associated with a netNS Richard Guy Briggs
2019-10-11  0:39   ` Paul Moore
2019-09-19  1:22 ` [PATCH ghak90 V7 14/21] audit: contid check descendancy and nesting Richard Guy Briggs
2019-10-11  0:40   ` Paul Moore
2019-10-24 22:08     ` Richard Guy Briggs
2019-10-30 20:32       ` Paul Moore
2019-09-19  1:22 ` [PATCH ghak90 V7 15/21] sched: pull task_is_descendant into kernel/sched/core.c Richard Guy Briggs
2019-10-11  0:40   ` Paul Moore
2019-09-19  1:22 ` [PATCH ghak90 V7 16/21] audit: add support for contid set/get by netlink Richard Guy Briggs
2019-10-11  0:40   ` Paul Moore
2019-09-19  1:22 ` [PATCH ghak90 V7 17/21] audit: add support for loginuid/sessionid " Richard Guy Briggs
2019-10-11  0:40   ` Paul Moore
2019-09-19  1:22 ` [PATCH ghak90 V7 18/21] audit: track container nesting Richard Guy Briggs
2019-10-11  0:40   ` Paul Moore
2019-09-19  1:22 ` [PATCH ghak90 V7 19/21] audit: check cont depth Richard Guy Briggs
2019-09-19  1:22 ` [PATCH ghak90 V7 20/21] audit: add capcontid to set contid outside init_user_ns Richard Guy Briggs
2019-10-19  1:39   ` Richard Guy Briggs
2019-10-21 19:53     ` Paul Moore
2019-10-21 21:38       ` Richard Guy Briggs
2019-10-21 21:43         ` Paul Moore
2019-10-21 23:57           ` Richard Guy Briggs
2019-10-22  0:31             ` Paul Moore
2019-10-22 12:13               ` Neil Horman
2019-10-22 14:04                 ` Paul Moore
2019-10-22 20:06                 ` Richard Guy Briggs
2019-10-22 14:27               ` Richard Guy Briggs
2019-10-22 14:34                 ` Paul Moore
2019-10-24 21:00               ` Richard Guy Briggs
2019-10-30 20:27                 ` Paul Moore
2019-10-30 22:03                   ` Richard Guy Briggs
2019-10-31 13:59                     ` Paul Moore
2019-10-31 14:50                     ` Steve Grubb
2019-10-31 23:37                       ` Paul Moore
2019-11-01  1:02                       ` Duncan Roe
2019-11-01 15:09                       ` Richard Guy Briggs
2019-11-01 15:13                         ` Steve Grubb
2019-11-01 15:21                           ` Richard Guy Briggs
2019-11-01 16:22                         ` Paul Moore
2019-09-19  1:22 ` [PATCH ghak90 V7 21/21] audit: add proc interface for capcontid Richard Guy Briggs

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