---

yaml
---
r: 28021
b: refs/heads/master
c: 9044e6b
h: refs/heads/master
i:
  28019: 0922407
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: bc0f3b8ebba611291fdaa2864dbffd2d29336c64
+refs/heads/master: 9044e6bca5a4a575d3c068dfccb5651a2d6a13bc

trunk/kernel/audit.c

@@ -366,6 +366,50 @@ static int kauditd_thread(void *dummy)
 	return 0;
 }
 
+int audit_send_list(void *_dest)
+{
+	struct audit_netlink_list *dest = _dest;
+	int pid = dest->pid;
+	struct sk_buff *skb;
+
+	/* wait for parent to finish and send an ACK */
+	mutex_lock(&audit_netlink_mutex);
+	mutex_unlock(&audit_netlink_mutex);
+
+	while ((skb = __skb_dequeue(&dest->q)) != NULL)
+		netlink_unicast(audit_sock, skb, pid, 0);
+
+	kfree(dest);
+
+	return 0;
+}
+
+struct sk_buff *audit_make_reply(int pid, int seq, int type, int done,
+				 int multi, void *payload, int size)
+{
+	struct sk_buff	*skb;
+	struct nlmsghdr	*nlh;
+	int		len = NLMSG_SPACE(size);
+	void		*data;
+	int		flags = multi ? NLM_F_MULTI : 0;
+	int		t     = done  ? NLMSG_DONE  : type;
+
+	skb = alloc_skb(len, GFP_KERNEL);
+	if (!skb)
+		return NULL;
+
+	nlh		 = NLMSG_PUT(skb, pid, seq, t, size);
+	nlh->nlmsg_flags = flags;
+	data		 = NLMSG_DATA(nlh);
+	memcpy(data, payload, size);
+	return skb;
+
+nlmsg_failure:			/* Used by NLMSG_PUT */
+	if (skb)
+		kfree_skb(skb);
+	return NULL;
+}
+
 /**
  * audit_send_reply - send an audit reply message via netlink
  * @pid: process id to send reply to
@@ -383,29 +427,13 @@ void audit_send_reply(int pid, int seq, int type, int done, int multi,
 		      void *payload, int size)
 {
 	struct sk_buff	*skb;
-	struct nlmsghdr	*nlh;
-	int		len = NLMSG_SPACE(size);
-	void		*data;
-	int		flags = multi ? NLM_F_MULTI : 0;
-	int		t     = done  ? NLMSG_DONE  : type;
-
-	skb = alloc_skb(len, GFP_KERNEL);
+	skb = audit_make_reply(pid, seq, type, done, multi, payload, size);
 	if (!skb)
 		return;
-
-	nlh		 = NLMSG_PUT(skb, pid, seq, t, size);
-	nlh->nlmsg_flags = flags;
-	data		 = NLMSG_DATA(nlh);
-	memcpy(data, payload, size);
-
 	/* Ignore failure. It'll only happen if the sender goes away,
 	   because our timeout is set to infinite. */
 	netlink_unicast(audit_sock, skb, pid, 0);
 	return;
-
-nlmsg_failure:			/* Used by NLMSG_PUT */
-	if (skb)
-		kfree_skb(skb);
 }
 
 /*

trunk/kernel/audit.h

@@ -22,6 +22,7 @@
 #include <linux/mutex.h>
 #include <linux/fs.h>
 #include <linux/audit.h>
+#include <linux/skbuff.h>
 
 /* 0 = no checking
    1 = put_count checking
@@ -82,11 +83,21 @@ struct audit_entry {
 extern int audit_pid;
 extern int audit_comparator(const u32 left, const u32 op, const u32 right);
 
+extern struct sk_buff *	    audit_make_reply(int pid, int seq, int type,
+					     int done, int multi,
+					     void *payload, int size);
 extern void		    audit_send_reply(int pid, int seq, int type,
 					     int done, int multi,
 					     void *payload, int size);
 extern void		    audit_log_lost(const char *message);
 extern void		    audit_panic(const char *message);
 extern struct mutex audit_netlink_mutex;
 
+struct audit_netlink_list {
+	int pid;
+	struct sk_buff_head q;
+};
+
+int audit_send_list(void *);
+
 extern int selinux_audit_rule_update(void);

trunk/kernel/auditfilter.c

@@ -510,19 +510,12 @@ static inline int audit_del_rule(struct audit_entry *entry,
 
 /* List rules using struct audit_rule.  Exists for backward
  * compatibility with userspace. */
-static int audit_list(void *_dest)
+static void audit_list(int pid, int seq, struct sk_buff_head *q)
 {
-	int pid, seq;
-	int *dest = _dest;
+	struct sk_buff *skb;
 	struct audit_entry *entry;
 	int i;
 
-	pid = dest[0];
-	seq = dest[1];
-	kfree(dest);
-
-	mutex_lock(&audit_netlink_mutex);
-
 	/* The *_rcu iterators not needed here because we are
 	   always called with audit_netlink_mutex held. */
 	for (i=0; i<AUDIT_NR_FILTERS; i++) {
@@ -532,31 +525,25 @@ static int audit_list(void *_dest)
 			rule = audit_krule_to_rule(&entry->rule);
 			if (unlikely(!rule))
 				break;
-			audit_send_reply(pid, seq, AUDIT_LIST, 0, 1,
+			skb = audit_make_reply(pid, seq, AUDIT_LIST, 0, 1,
 					 rule, sizeof(*rule));
+			if (skb)
+				skb_queue_tail(q, skb);
 			kfree(rule);
 		}
 	}
-	audit_send_reply(pid, seq, AUDIT_LIST, 1, 1, NULL, 0);
-
-	mutex_unlock(&audit_netlink_mutex);
-	return 0;
+	skb = audit_make_reply(pid, seq, AUDIT_LIST, 1, 1, NULL, 0);
+	if (skb)
+		skb_queue_tail(q, skb);
 }
 
 /* List rules using struct audit_rule_data. */
-static int audit_list_rules(void *_dest)
+static void audit_list_rules(int pid, int seq, struct sk_buff_head *q)
 {
-	int pid, seq;
-	int *dest = _dest;
+	struct sk_buff *skb;
 	struct audit_entry *e;
 	int i;
 
-	pid = dest[0];
-	seq = dest[1];
-	kfree(dest);
-
-	mutex_lock(&audit_netlink_mutex);
-
 	/* The *_rcu iterators not needed here because we are
 	   always called with audit_netlink_mutex held. */
 	for (i=0; i<AUDIT_NR_FILTERS; i++) {
@@ -566,15 +553,16 @@ static int audit_list_rules(void *_dest)
 			data = audit_krule_to_data(&e->rule);
 			if (unlikely(!data))
 				break;
-			audit_send_reply(pid, seq, AUDIT_LIST_RULES, 0, 1,
+			skb = audit_make_reply(pid, seq, AUDIT_LIST_RULES, 0, 1,
 					 data, sizeof(*data));
+			if (skb)
+				skb_queue_tail(q, skb);
 			kfree(data);
 		}
 	}
-	audit_send_reply(pid, seq, AUDIT_LIST_RULES, 1, 1, NULL, 0);
-
-	mutex_unlock(&audit_netlink_mutex);
-	return 0;
+	skb = audit_make_reply(pid, seq, AUDIT_LIST_RULES, 1, 1, NULL, 0);
+	if (skb)
+		skb_queue_tail(q, skb);
 }
 
 /**
@@ -592,7 +580,7 @@ int audit_receive_filter(int type, int pid, int uid, int seq, void *data,
 			 size_t datasz, uid_t loginuid, u32 sid)
 {
 	struct task_struct *tsk;
-	int *dest;
+	struct audit_netlink_list *dest;
 	int err = 0;
 	struct audit_entry *entry;
 
@@ -605,18 +593,20 @@ int audit_receive_filter(int type, int pid, int uid, int seq, void *data,
 		 * happen if we're actually running in the context of auditctl
 		 * trying to _send_ the stuff */
 
-		dest = kmalloc(2 * sizeof(int), GFP_KERNEL);
+		dest = kmalloc(sizeof(struct audit_netlink_list), GFP_KERNEL);
 		if (!dest)
 			return -ENOMEM;
-		dest[0] = pid;
-		dest[1] = seq;
+		dest->pid = pid;
+		skb_queue_head_init(&dest->q);
 
 		if (type == AUDIT_LIST)
-			tsk = kthread_run(audit_list, dest, "audit_list");
+			audit_list(pid, seq, &dest->q);
 		else
-			tsk = kthread_run(audit_list_rules, dest,
-					  "audit_list_rules");
+			audit_list_rules(pid, seq, &dest->q);
+
+		tsk = kthread_run(audit_send_list, dest, "audit_send_list");
 		if (IS_ERR(tsk)) {
+			skb_queue_purge(&dest->q);
 			kfree(dest);
 			err = PTR_ERR(tsk);
 		}