diff --git a/[refs] b/[refs]
index 7a5fb477d25c..8206ebbc1f7f 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: cca1c81f43e26ab60c0d1090fb90992358d69bdf
+refs/heads/master: 207dde8289d9b005b665cb9d8d2bb9464256101d
diff --git a/trunk/fs/btrfs/free-space-cache.c b/trunk/fs/btrfs/free-space-cache.c
index 63731a1fb0a1..d634a7e42207 100644
--- a/trunk/fs/btrfs/free-space-cache.c
+++ b/trunk/fs/btrfs/free-space-cache.c
@@ -420,7 +420,14 @@ int load_free_space_cache(struct btrfs_fs_info *fs_info,
 				spin_lock(&block_group->tree_lock);
 				ret = link_free_space(block_group, e);
 				spin_unlock(&block_group->tree_lock);
-				BUG_ON(ret);
+				if (ret) {
+					printk(KERN_ERR "Duplicate entries in "
+					       "free space cache, dumping\n");
+					kunmap(page);
+					unlock_page(page);
+					page_cache_release(page);
+					goto free_cache;
+				}
 			} else {
 				e->bitmap = kzalloc(PAGE_CACHE_SIZE, GFP_NOFS);
 				if (!e->bitmap) {
@@ -437,6 +444,14 @@ int load_free_space_cache(struct btrfs_fs_info *fs_info,
 				recalculate_thresholds(block_group);
 				spin_unlock(&block_group->tree_lock);
 				list_add_tail(&e->list, &bitmaps);
+				if (ret) {
+					printk(KERN_ERR "Duplicate entries in "
+					       "free space cache, dumping\n");
+					kunmap(page);
+					unlock_page(page);
+					page_cache_release(page);
+					goto free_cache;
+				}
 			}
 
 			num_entries--;
@@ -909,10 +924,16 @@ static int tree_insert_offset(struct rb_root *root, u64 offset,
 			 * logically.
 			 */
 			if (bitmap) {
-				WARN_ON(info->bitmap);
+				if (info->bitmap) {
+					WARN_ON_ONCE(1);
+					return -EEXIST;
+				}
 				p = &(*p)->rb_right;
 			} else {
-				WARN_ON(!info->bitmap);
+				if (!info->bitmap) {
+					WARN_ON_ONCE(1);
+					return -EEXIST;
+				}
 				p = &(*p)->rb_left;
 			}
 		}