1 files changed, 6 insertions, 0 deletions

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 3fdcc0512d3a..ec96f3a6d536 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -2853,6 +2853,12 @@ static noinline int split_leaf(struct btrfs_trans_handle *trans,
         int split;
         int num_doubles = 0;
 
+        l = path->nodes[0];
+        slot = path->slots[0];
+        if (extend && data_size + btrfs_item_size_nr(l, slot) +
+            sizeof(struct btrfs_item) > BTRFS_LEAF_DATA_SIZE(root))
+                return -EOVERFLOW;
+
         /* first try to make some room by pushing left and right */
         if (data_size && ins_key->type != BTRFS_DIR_ITEM_KEY) {
                 wret = push_leaf_right(trans, root, path, data_size, 0);