#include <linux/freezer.h>
#include <linux/tty.h>
#include <linux/pid_namespace.h>
+#include <net/netns/generic.h>
#include "audit.h"
* the portid to use to send netlink messages to that process.
*/
int audit_pid;
-static int audit_nlk_portid;
+static __u32 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
/* Number of outstanding audit_buffers allowed. */
static int audit_backlog_limit = 64;
-static int audit_backlog_wait_time = 60 * HZ;
+#define AUDIT_BACKLOG_WAIT_TIME (60 * HZ)
+static int audit_backlog_wait_time = AUDIT_BACKLOG_WAIT_TIME;
static int audit_backlog_wait_overflow = 0;
/* The identity of the user shutting down the audit system. */
/* The netlink socket. */
static struct sock *audit_sock;
+int audit_net_id;
/* Hash for inode-based rules */
struct list_head audit_inode_hash[AUDIT_INODE_BUCKETS];
};
struct audit_reply {
- int pid;
+ __u32 portid;
+ pid_t pid;
struct sk_buff *skb;
};
-static void audit_set_pid(struct audit_buffer *ab, pid_t pid)
+static void audit_set_portid(struct audit_buffer *ab, __u32 portid)
{
if (ab) {
struct nlmsghdr *nlh = nlmsg_hdr(ab->skb);
- nlh->nlmsg_pid = pid;
+ nlh->nlmsg_pid = portid;
}
}
printk(KERN_ERR "audit: *NO* daemon at audit_pid=%d\n", audit_pid);
audit_log_lost("auditd disappeared\n");
audit_pid = 0;
+ audit_sock = NULL;
/* we might get lucky and get this in the next auditd */
audit_hold_skb(skb);
} else
flush_hold_queue();
skb = skb_dequeue(&audit_skb_queue);
- wake_up(&audit_backlog_wait);
+
if (skb) {
+ if (skb_queue_len(&audit_skb_queue) <= audit_backlog_limit)
+ wake_up(&audit_backlog_wait);
if (audit_pid)
kauditd_send_skb(skb);
else
int audit_send_list(void *_dest)
{
struct audit_netlink_list *dest = _dest;
- int pid = dest->pid;
struct sk_buff *skb;
+ struct net *net = get_net_ns_by_pid(dest->pid);
+ struct audit_net *aunet = net_generic(net, audit_net_id);
/* wait for parent to finish and send an ACK */
mutex_lock(&audit_cmd_mutex);
mutex_unlock(&audit_cmd_mutex);
while ((skb = __skb_dequeue(&dest->q)) != NULL)
- netlink_unicast(audit_sock, skb, pid, 0);
+ netlink_unicast(aunet->nlsk, skb, dest->portid, 0);
kfree(dest);
return 0;
}
-struct sk_buff *audit_make_reply(int pid, int seq, int type, int done,
+struct sk_buff *audit_make_reply(__u32 portid, int seq, int type, int done,
int multi, const void *payload, int size)
{
struct sk_buff *skb;
if (!skb)
return NULL;
- nlh = nlmsg_put(skb, pid, seq, t, size, flags);
+ nlh = nlmsg_put(skb, portid, seq, t, size, flags);
if (!nlh)
goto out_kfree_skb;
data = nlmsg_data(nlh);
static int audit_send_reply_thread(void *arg)
{
struct audit_reply *reply = (struct audit_reply *)arg;
+ struct net *net = get_net_ns_by_pid(reply->pid);
+ struct audit_net *aunet = net_generic(net, audit_net_id);
mutex_lock(&audit_cmd_mutex);
mutex_unlock(&audit_cmd_mutex);
/* Ignore failure. It'll only happen if the sender goes away,
because our timeout is set to infinite. */
- netlink_unicast(audit_sock, reply->skb, reply->pid, 0);
+ netlink_unicast(aunet->nlsk , reply->skb, reply->portid, 0);
kfree(reply);
return 0;
}
/**
* audit_send_reply - send an audit reply message via netlink
- * @pid: process id to send reply to
+ * @portid: netlink port to which to send reply
* @seq: sequence number
* @type: audit message type
* @done: done (last) flag
* @payload: payload data
* @size: payload size
*
- * Allocates an skb, builds the netlink message, and sends it to the pid.
+ * Allocates an skb, builds the netlink message, and sends it to the port id.
* No failure notifications.
*/
-static void audit_send_reply(int pid, int seq, int type, int done, int multi,
- const void *payload, int size)
+static void audit_send_reply(__u32 portid, int seq, int type, int done,
+ int multi, const void *payload, int size)
{
struct sk_buff *skb;
struct task_struct *tsk;
if (!reply)
return;
- skb = audit_make_reply(pid, seq, type, done, multi, payload, size);
+ skb = audit_make_reply(portid, seq, type, done, multi, payload, size);
if (!skb)
goto out;
- reply->pid = pid;
+ reply->portid = portid;
+ reply->pid = task_pid_vnr(current);
reply->skb = skb;
tsk = kthread_run(audit_send_reply_thread, reply, "audit_send_reply");
audit_log_config_change("audit_pid", new_pid, audit_pid, 1);
audit_pid = new_pid;
audit_nlk_portid = NETLINK_CB(skb).portid;
+ audit_sock = NETLINK_CB(skb).sk;
}
if (status_get->mask & AUDIT_STATUS_RATE_LIMIT) {
err = audit_set_rate_limit(status_get->rate_limit);
size--;
audit_log_n_untrustedstring(ab, data, size);
}
- audit_set_pid(ab, NETLINK_CB(skb).portid);
+ audit_set_portid(ab, NETLINK_CB(skb).portid);
audit_log_end(ab);
}
break;
mutex_unlock(&audit_cmd_mutex);
}
-/* Initialize audit support at boot time. */
-static int __init audit_init(void)
+static int __net_init audit_net_init(struct net *net)
{
- int i;
struct netlink_kernel_cfg cfg = {
.input = audit_receive,
};
+ struct audit_net *aunet = net_generic(net, audit_net_id);
+
+ pr_info("audit: initializing netlink socket in namespace\n");
+
+ aunet->nlsk = netlink_kernel_create(net, NETLINK_AUDIT, &cfg);
+ if (aunet->nlsk == NULL)
+ return -ENOMEM;
+ if (!aunet->nlsk)
+ audit_panic("cannot initialize netlink socket in namespace");
+ else
+ aunet->nlsk->sk_sndtimeo = MAX_SCHEDULE_TIMEOUT;
+ return 0;
+}
+
+static void __net_exit audit_net_exit(struct net *net)
+{
+ struct audit_net *aunet = net_generic(net, audit_net_id);
+ struct sock *sock = aunet->nlsk;
+ if (sock == audit_sock) {
+ audit_pid = 0;
+ audit_sock = NULL;
+ }
+
+ rcu_assign_pointer(aunet->nlsk, NULL);
+ synchronize_net();
+ netlink_kernel_release(sock);
+}
+
+static struct pernet_operations __net_initdata audit_net_ops = {
+ .init = audit_net_init,
+ .exit = audit_net_exit,
+ .id = &audit_net_id,
+ .size = sizeof(struct audit_net),
+};
+
+/* Initialize audit support at boot time. */
+static int __init audit_init(void)
+{
+ int i;
+
if (audit_initialized == AUDIT_DISABLED)
return 0;
- printk(KERN_INFO "audit: initializing netlink socket (%s)\n",
+ pr_info("audit: initializing netlink subsys (%s)\n",
audit_default ? "enabled" : "disabled");
- audit_sock = netlink_kernel_create(&init_net, NETLINK_AUDIT, &cfg);
- if (!audit_sock)
- audit_panic("cannot initialize netlink socket");
- else
- audit_sock->sk_sndtimeo = MAX_SCHEDULE_TIMEOUT;
+ register_pernet_subsys(&audit_net_ops);
skb_queue_head_init(&audit_skb_queue);
skb_queue_head_init(&audit_skb_hold_queue);
/*
* Wait for auditd to drain the queue a little
*/
-static void wait_for_auditd(unsigned long sleep_time)
+static unsigned long wait_for_auditd(unsigned long sleep_time)
{
+ unsigned long timeout = sleep_time;
DECLARE_WAITQUEUE(wait, current);
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&audit_backlog_wait, &wait);
if (audit_backlog_limit &&
skb_queue_len(&audit_skb_queue) > audit_backlog_limit)
- schedule_timeout(sleep_time);
+ timeout = schedule_timeout(sleep_time);
__set_current_state(TASK_RUNNING);
remove_wait_queue(&audit_backlog_wait, &wait);
+
+ return timeout;
}
/**
sleep_time = timeout_start + audit_backlog_wait_time -
jiffies;
- if ((long)sleep_time > 0)
- wait_for_auditd(sleep_time);
- continue;
+ if ((long)sleep_time > 0) {
+ sleep_time = wait_for_auditd(sleep_time);
+ if ((long)sleep_time > 0)
+ continue;
+ }
}
if (audit_rate_check() && printk_ratelimit())
printk(KERN_WARNING
return NULL;
}
+ audit_backlog_wait_time = AUDIT_BACKLOG_WAIT_TIME;
+
ab = audit_buffer_alloc(ctx, gfp_mask, type);
if (!ab) {
audit_log_lost("out of memory in audit_log_start");
}
}
+ /* log the audit_names record type */
+ audit_log_format(ab, " nametype=");
+ switch(n->type) {
+ case AUDIT_TYPE_NORMAL:
+ audit_log_format(ab, "NORMAL");
+ break;
+ case AUDIT_TYPE_PARENT:
+ audit_log_format(ab, "PARENT");
+ break;
+ case AUDIT_TYPE_CHILD_DELETE:
+ audit_log_format(ab, "DELETE");
+ break;
+ case AUDIT_TYPE_CHILD_CREATE:
+ audit_log_format(ab, "CREATE");
+ break;
+ default:
+ audit_log_format(ab, "UNKNOWN");
+ break;
+ }
+
audit_log_fcaps(ab, n);
audit_log_end(ab);
}
audit_log_format(ab,
" ppid=%ld pid=%d auid=%u uid=%u gid=%u"
" euid=%u suid=%u fsuid=%u"
- " egid=%u sgid=%u fsgid=%u ses=%u tty=%s",
+ " egid=%u sgid=%u fsgid=%u tty=%s ses=%u",
sys_getppid(),
tsk->pid,
from_kuid(&init_user_ns, audit_get_loginuid(tsk)),
from_kgid(&init_user_ns, cred->egid),
from_kgid(&init_user_ns, cred->sgid),
from_kgid(&init_user_ns, cred->fsgid),
- audit_get_sessionid(tsk), tty);
+ tty, audit_get_sessionid(tsk));
get_task_comm(name, tsk);
audit_log_format(ab, " comm=");
projects / linux-2.6-microblaze.git / blobdiff