Btrfs: fix race leading to BUG_ON when running delalloc for nodatacow

[pandora-kernel.git] / fs / btrfs / inode.c

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index bd56c47..e4c38d4 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1127,8 +1127,14 @@ next_slot:
                num_bytes = 0;
                btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
 
-               if (found_key.objectid > ino ||
-                   found_key.type > BTRFS_EXTENT_DATA_KEY ||
+               if (found_key.objectid > ino)
+                       break;
+               if (WARN_ON_ONCE(found_key.objectid < ino) ||
+                   found_key.type < BTRFS_EXTENT_DATA_KEY) {
+                       path->slots[0]++;
+                       goto next_slot;
+               }
+               if (found_key.type > BTRFS_EXTENT_DATA_KEY ||
                    found_key.offset > end)
                        break;