drm/i915: Assert that the exec object lookup table is a power-of-two

[~andy/linux] / kernel / audit_tree.c

diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c
index 69a58515f43f1023f3b313733770274480bba88a..ed206fd88cca76e75a0d8866ab703a7f6fdf38d6 100644 (file)
--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -250,7 +250,6 @@ static void untag_chunk(struct node *p)
                spin_unlock(&hash_lock);
                spin_unlock(&entry->lock);
                fsnotify_destroy_mark(entry);
-               fsnotify_put_mark(entry);
                goto out;
        }
 
@@ -293,7 +292,7 @@ static void untag_chunk(struct node *p)
        spin_unlock(&hash_lock);
        spin_unlock(&entry->lock);
        fsnotify_destroy_mark(entry);
-       fsnotify_put_mark(entry);
+       fsnotify_put_mark(&new->mark);  /* drop initial reference */
        goto out;
 
 Fallback:
@@ -347,6 +346,7 @@ static int create_chunk(struct inode *inode, struct audit_tree *tree)
        insert_hash(chunk);
        spin_unlock(&hash_lock);
        spin_unlock(&entry->lock);
+       fsnotify_put_mark(entry);       /* drop initial reference */
        return 0;
 }
 
@@ -444,8 +444,8 @@ static int tag_chunk(struct inode *inode, struct audit_tree *tree)
        spin_unlock(&chunk_entry->lock);
        spin_unlock(&old_entry->lock);
        fsnotify_destroy_mark(old_entry);
+       fsnotify_put_mark(chunk_entry); /* drop initial reference */
        fsnotify_put_mark(old_entry); /* pair to fsnotify_find mark_entry */
-       fsnotify_put_mark(old_entry); /* and kill it */
        return 0;
 }
 
@@ -916,7 +916,12 @@ static void audit_tree_freeing_mark(struct fsnotify_mark *entry, struct fsnotify
        struct audit_chunk *chunk = container_of(entry, struct audit_chunk, mark);
 
        evict_chunk(chunk);
-       fsnotify_put_mark(entry);
+
+       /*
+        * We are guaranteed to have at least one reference to the mark from
+        * either the inode or the caller of fsnotify_destroy_mark().
+        */
+       BUG_ON(atomic_read(&entry->refcnt) < 1);
 }
 
 static bool audit_tree_send_event(struct fsnotify_group *group, struct inode *inode,