linux-kernel - [PATCH 19/22] Audit: pass proper user namespace to audit_log_common_recv

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Date:	Wed, 19 Jun 2013 09:53:51 +0800
From:	Gao feng <gaofeng@...fujitsu.com>
To:	containers@...ts.linux-foundation.org, linux-audit@...hat.com,
	linux-kernel@...r.kernel.org
Cc:	eparis@...hat.com, serge.hallyn@...ntu.com, ebiederm@...ssion.com,
	sgrubb@...hat.com, aris@...hat.com, matthltc@...ux.vnet.ibm.com,
	Gao feng <gaofeng@...fujitsu.com>
Subject: [PATCH 19/22] Audit: pass proper user namespace to audit_log_common_recv_msg

The audit log that generated in user namespace should be
received by the auditd running in this user namespace.

Signed-off-by: Gao feng <gaofeng@...fujitsu.com>
---
 kernel/audit.c | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/kernel/audit.c b/kernel/audit.c
index 5d3764c..2d81aac 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -624,17 +624,18 @@ static int audit_netlink_ok(struct sk_buff *skb, u16 msg_type)
 	return err;
 }
 
-static int audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type)
+static int audit_log_common_recv_msg(struct user_namespace *ns,
+				     struct audit_buffer **ab, u16 msg_type)
 {
 	int rc = 0;
-	uid_t uid = from_kuid(&init_user_ns, current_uid());
+	uid_t uid = from_kuid(ns, current_uid());
 
-	if (!audit_enabled_ns(&init_user_ns)) {
+	if (!audit_enabled_ns(ns)) {
 		*ab = NULL;
 		return rc;
 	}
 
-	*ab = audit_log_start(NULL, GFP_KERNEL, msg_type);
+	*ab = audit_log_start_ns(ns, NULL, GFP_KERNEL, msg_type);
 	if (unlikely(!*ab))
 		return rc;
 	audit_log_format(*ab, "pid=%d uid=%u", task_tgid_vnr(current), uid);
@@ -737,7 +738,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 				if (err)
 					break;
 			}
-			audit_log_common_recv_msg(&ab, msg_type);
+			audit_log_common_recv_msg(ns, &ab, msg_type);
 			if (msg_type != AUDIT_USER_TTY)
 				audit_log_format(ab, " msg='%.1024s'",
 						 (char *)data);
@@ -752,7 +753,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 				audit_log_n_untrustedstring(ab, data, size);
 			}
 			audit_set_pid(ab, NETLINK_CB(skb).portid);
-			audit_log_end(ab);
+			audit_log_end_ns(ns, ab);
 		}
 		break;
 	case AUDIT_ADD_RULE:
@@ -760,10 +761,11 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 		if (nlmsg_len(nlh) < sizeof(struct audit_rule_data))
 			return -EINVAL;
 		if (ns->audit.enabled == AUDIT_LOCKED) {
-			audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE);
+			audit_log_common_recv_msg(ns, &ab,
+						  AUDIT_CONFIG_CHANGE);
 			audit_log_format(ab, " audit_enabled=%d res=0",
 					 ns->audit.enabled);
-			audit_log_end(ab);
+			audit_log_end_ns(ns, ab);
 			return -EPERM;
 		}
 		/* fallthrough */
@@ -773,9 +775,9 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 		break;
 	case AUDIT_TRIM:
 		audit_trim_trees();
-		audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE);
+		audit_log_common_recv_msg(ns, &ab, AUDIT_CONFIG_CHANGE);
 		audit_log_format(ab, " op=trim res=1");
-		audit_log_end(ab);
+		audit_log_end_ns(ns, ab);
 		break;
 	case AUDIT_MAKE_EQUIV: {
 		void *bufp = data;
@@ -803,14 +805,14 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 		/* OK, here comes... */
 		err = audit_tag_tree(old, new);
 
-		audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE);
+		audit_log_common_recv_msg(ns, &ab, AUDIT_CONFIG_CHANGE);
 
 		audit_log_format(ab, " op=make_equiv old=");
 		audit_log_untrustedstring(ab, old);
 		audit_log_format(ab, " new=");
 		audit_log_untrustedstring(ab, new);
 		audit_log_format(ab, " res=%d", !err);
-		audit_log_end(ab);
+		audit_log_end_ns(ns, ab);
 		kfree(old);
 		kfree(new);
 		break;
-- 
1.8.1.4

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