[PATCH RFC 21/48] Audit: pass proper user namespace to audit_log_common_recv_msg

[Gao feng]

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@xxxxxxxxxxxxxx>
---
 kernel/audit.c | 31 ++++++++++++++++---------------
 1 file changed, 16 insertions(+), 15 deletions(-)

diff --git a/kernel/audit.c b/kernel/audit.c
index 594e4e1..c8329ce 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -604,25 +604,26 @@ 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,
 				     kuid_t auid, u32 ses, u32 sid)
 {
 	int rc = 0;
 	char *ctx = NULL;
 	u32 len;
 
-	if (!init_user_ns.audit.enabled) {
+	if (!ns->audit.enabled) {
 		*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 auid=%u ses=%u",
 			 task_tgid_vnr(current),
-			 from_kuid(&init_user_ns, current_uid()),
-			 from_kuid(&init_user_ns, auid), ses);
+			 from_kuid(ns, current_uid()),
+			 from_kuid(ns, auid), ses);
 	if (sid) {
 		rc = security_secid_to_secctx(sid, &ctx, &len);
 		if (rc)
@@ -739,7 +740,7 @@ 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,
 						  loginuid, sessionid, sid);
 
 			if (msg_type != AUDIT_USER_TTY)
@@ -756,7 +757,7 @@ 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:
@@ -764,12 +765,12 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 		if (nlmsg_len(nlh) < sizeof(struct audit_rule))
 			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,
 						  loginuid, sessionid, sid);
 
 			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 */
@@ -783,12 +784,12 @@ 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,
 						  loginuid, sessionid, sid);
 
 			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 */
@@ -800,11 +801,11 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 	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,
 					  loginuid, sessionid, sid);
 
 		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;
@@ -832,7 +833,7 @@ 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,
 					  loginuid, sessionid, sid);
 
 		audit_log_format(ab, " op=make_equiv old=");
@@ -840,7 +841,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 		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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