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Subject[PATCH RFC 08/48] Audit: make audit_nlk_portid per user namesapce
Date
After this patch, audit_nlk_port is per user namespace.
Just like prev patch does,use audit_nlk_portid of init
user namespace in kauditd_send_skb.

Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
---
include/linux/user_namespace.h | 1 +
kernel/audit.c | 11 ++---------
2 files changed, 3 insertions(+), 9 deletions(-)

diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h
index a6c6174..769a12b 100644
--- a/include/linux/user_namespace.h
+++ b/include/linux/user_namespace.h
@@ -22,6 +22,7 @@ struct uid_gid_map { /* 64 bytes -- 1 cache line */
struct audit_ctrl {
struct sock *sock;
int pid;
+ int portid;
struct sk_buff_head queue;
struct sk_buff_head hold_queue;
struct task_struct *kauditd_task;
diff --git a/kernel/audit.c b/kernel/audit.c
index 2ce7a21..b946b29 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -87,13 +87,6 @@ static int audit_default;
/* If auditing cannot proceed, audit_failure selects what happens. */
static int audit_failure = AUDIT_FAIL_PRINTK;

-/*
- * If audit records are to be written to the netlink socket, audit_pid
- * contains the pid of the auditd process and audit_nlk_portid contains
- * the portid to use to send netlink messages to that process.
- */
-static int audit_nlk_portid;
-
/* If audit_rate_limit is non-zero, limit the rate of sending audit records
* to that number per second. This prevents DoS attacks, but results in
* audit records being dropped. */
@@ -400,7 +393,7 @@ static void kauditd_send_skb(struct sk_buff *skb)
/* take a reference in case we can't send it and we want to hold it */
skb_get(skb);
err = netlink_unicast(init_user_ns.audit.sock, skb,
- audit_nlk_portid, 0);
+ init_user_ns.audit.portid, 0);
if (err < 0) {
BUG_ON(err != -ECONNREFUSED); /* Shouldn't happen */
printk(KERN_ERR "audit: *NO* daemon at audit_pid=%d\n",
@@ -717,7 +710,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
sessionid, sid, 1);

ns->audit.pid = new_pid;
- audit_nlk_portid = NETLINK_CB(skb).portid;
+ ns->audit.portid = NETLINK_CB(skb).portid;
}
if (status_get->mask & AUDIT_STATUS_RATE_LIMIT) {
err = audit_set_rate_limit(status_get->rate_limit,
--
1.8.1.4


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