KVM: MMU: invalidate and flush on spte small->large page size change

[safe/jmp/linux-2.6] / kernel / audit.c

diff --git a/kernel/audit.c b/kernel/audit.c
index 01082a1..c71bd26 100644 (file)
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -46,6 +46,7 @@
 #include <asm/atomic.h>
 #include <linux/mm.h>
 #include <linux/module.h>
+#include <linux/slab.h>
 #include <linux/err.h>
 #include <linux/kthread.h>
 
@@ -115,9 +116,6 @@ static atomic_t    audit_lost = ATOMIC_INIT(0);
 /* The netlink socket. */
 static struct sock *audit_sock;
 
-/* Inotify handle. */
-struct inotify_handle *audit_ih;
-
 /* Hash for inode-based rules */
 struct list_head audit_inode_hash[AUDIT_INODE_BUCKETS];
 
@@ -136,7 +134,7 @@ static DECLARE_WAIT_QUEUE_HEAD(kauditd_wait);
 static DECLARE_WAIT_QUEUE_HEAD(audit_backlog_wait);
 
 /* Serialize requests from userspace. */
-static DEFINE_MUTEX(audit_cmd_mutex);
+DEFINE_MUTEX(audit_cmd_mutex);
 
 /* AUDIT_BUFSIZ is the size of the temporary buffer used for formatting
  * audit records.  Since printk uses a 1024 byte buffer, this buffer
@@ -401,7 +399,7 @@ static void kauditd_send_skb(struct sk_buff *skb)
        skb_get(skb);
        err = netlink_unicast(audit_sock, skb, audit_nlk_pid, 0);
        if (err < 0) {
-               BUG_ON(err != -ECONNREFUSED); /* Shoudn't happen */
+               BUG_ON(err != -ECONNREFUSED); /* Shouldn't happen */
                printk(KERN_ERR "audit: *NO* daemon at audit_pid=%d\n", audit_pid);
                audit_log_lost("auditd dissapeared\n");
                audit_pid = 0;
@@ -508,21 +506,6 @@ int audit_send_list(void *_dest)
        return 0;
 }
 
-#ifdef CONFIG_AUDIT_TREE
-static int prune_tree_thread(void *unused)
-{
-       mutex_lock(&audit_cmd_mutex);
-       audit_prune_trees();
-       mutex_unlock(&audit_cmd_mutex);
-       return 0;
-}
-
-void audit_schedule_prune(void)
-{
-       kthread_run(prune_tree_thread, NULL, "audit_prune_tree");
-}
-#endif
-
 struct sk_buff *audit_make_reply(int pid, int seq, int type, int done,
                                 int multi, void *payload, int size)
 {
@@ -873,18 +856,24 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
                break;
        }
        case AUDIT_SIGNAL_INFO:
-               err = security_secid_to_secctx(audit_sig_sid, &ctx, &len);
-               if (err)
-                       return err;
+               len = 0;
+               if (audit_sig_sid) {
+                       err = security_secid_to_secctx(audit_sig_sid, &ctx, &len);
+                       if (err)
+                               return err;
+               }
                sig_data = kmalloc(sizeof(*sig_data) + len, GFP_KERNEL);
                if (!sig_data) {
-                       security_release_secctx(ctx, len);
+                       if (audit_sig_sid)
+                               security_release_secctx(ctx, len);
                        return -ENOMEM;
                }
                sig_data->uid = audit_sig_uid;
                sig_data->pid = audit_sig_pid;
-               memcpy(sig_data->ctx, ctx, len);
-               security_release_secctx(ctx, len);
+               if (audit_sig_sid) {
+                       memcpy(sig_data->ctx, ctx, len);
+                       security_release_secctx(ctx, len);
+               }
                audit_send_reply(NETLINK_CB(skb).pid, seq, AUDIT_SIGNAL_INFO,
                                0, 0, sig_data, sizeof(*sig_data) + len);
                kfree(sig_data);
@@ -937,28 +926,29 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 }
 
 /*
- * Get message from skb (based on rtnetlink_rcv_skb).  Each message is
- * processed by audit_receive_msg.  Malformed skbs with wrong length are
- * discarded silently.
+ * Get message from skb.  Each message is processed by audit_receive_msg.
+ * Malformed skbs with wrong length are discarded silently.
  */
 static void audit_receive_skb(struct sk_buff *skb)
 {
-       int             err;
-       struct nlmsghdr *nlh;
-       u32             rlen;
+       struct nlmsghdr *nlh;
+       /*
+        * len MUST be signed for NLMSG_NEXT to be able to dec it below 0
+        * if the nlmsg_len was not aligned
+        */
+       int len;
+       int err;
 
-       while (skb->len >= NLMSG_SPACE(0)) {
-               nlh = nlmsg_hdr(skb);
-               if (nlh->nlmsg_len < sizeof(*nlh) || skb->len < nlh->nlmsg_len)
-                       return;
-               rlen = NLMSG_ALIGN(nlh->nlmsg_len);
-               if (rlen > skb->len)
-                       rlen = skb->len;
-               if ((err = audit_receive_msg(skb, nlh))) {
+       nlh = nlmsg_hdr(skb);
+       len = skb->len;
+
+       while (NLMSG_OK(nlh, len)) {
+               err = audit_receive_msg(skb, nlh);
+               /* if err or if this message says it wants a response */
+               if (err || (nlh->nlmsg_flags & NLM_F_ACK))
                        netlink_ack(skb, nlh, err);
-               } else if (nlh->nlmsg_flags & NLM_F_ACK)
-                       netlink_ack(skb, nlh, 0);
-               skb_pull(skb, rlen);
+
+               nlh = NLMSG_NEXT(nlh, len);
        }
 }
 
@@ -970,13 +960,6 @@ static void audit_receive(struct sk_buff  *skb)
        mutex_unlock(&audit_cmd_mutex);
 }
 
-#ifdef CONFIG_AUDITSYSCALL
-static const struct inotify_operations audit_inotify_ops = {
-       .handle_event   = audit_handle_ievent,
-       .destroy_watch  = audit_free_parent,
-};
-#endif
-
 /* Initialize audit support at boot time. */
 static int __init audit_init(void)
 {
@@ -1002,12 +985,6 @@ static int __init audit_init(void)
 
        audit_log(NULL, GFP_KERNEL, AUDIT_KERNEL, "initialized");
 
-#ifdef CONFIG_AUDITSYSCALL
-       audit_ih = inotify_init(&audit_inotify_ops);
-       if (IS_ERR(audit_ih))
-               audit_panic("cannot initialize inotify handle");
-#endif
-
        for (i = 0; i < AUDIT_INODE_BUCKETS; i++)
                INIT_LIST_HEAD(&audit_inode_hash[i]);
 
@@ -1465,6 +1442,15 @@ void audit_log_d_path(struct audit_buffer *ab, const char *prefix,
        kfree(pathname);
 }
 
+void audit_log_key(struct audit_buffer *ab, char *key)
+{
+       audit_log_format(ab, " key=");
+       if (key)
+               audit_log_untrustedstring(ab, key);
+       else
+               audit_log_format(ab, "(null)");
+}
+
 /**
  * audit_log_end - end one audit record
  * @ab: the audit_buffer