When attempting to insert a new dir_item, we were calling btrfs_extent_item()
without checking if the leaf has enough space to extend the item. This made
btrfs_extent_item() crash through a BUG() call.
Therefore do the check and return ENOSPC if the leaf doesn't have enough space.
Signed-off-by: Filipe Manana <fdman...@suse.com>
---
fs/btrfs/dir-item.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c
index fc8df86..65bf60e 100644
--- a/fs/btrfs/dir-item.c
+++ b/fs/btrfs/dir-item.c
@@ -53,6 +53,8 @@ static struct btrfs_dir_item *insert_with_overflow(struct
btrfs_trans_handle
di = btrfs_match_dir_item_name(root, path, name, name_len);
if (di)
return ERR_PTR(-EEXIST);
+ if (btrfs_leaf_free_space(root, path->nodes[0]) < data_size)
+ return ERR_PTR(-ENOSPC);
btrfs_extend_item(root, path, data_size);
} else if (ret < 0)
return ERR_PTR(ret);
--
1.9.1
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