diff options
| -rw-r--r-- | fs/btrfs/ctree.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index 8496535828de..d6c29564ce49 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -584,9 +584,14 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans, btrfs_header_backref_rev(buf) < BTRFS_MIXED_BACKREF_REV) parent_start = buf->start; - atomic_inc(&cow->refs); ret = btrfs_tree_mod_log_insert_root(root->node, cow, true); - BUG_ON(ret < 0); + if (ret < 0) { + btrfs_tree_unlock(cow); + free_extent_buffer(cow); + btrfs_abort_transaction(trans, ret); + return ret; + } + atomic_inc(&cow->refs); rcu_assign_pointer(root->node, cow); btrfs_free_tree_block(trans, btrfs_root_id(root), buf, |