ubifs error at boot "bad node type"

[hujianyang]

> 
> # ls -l /mnt/rfs/
> [   87.054687] UBIFS error (pid 652): ubifs_read_node: bad node type (255 but expected 0)
> [   87.062500] UBIFS error (pid 652): ubifs_read_node: bad node at LEB 405:39728, LEB mapping status 1
> [   87.070312] Not a node, first 24 bytes:
> [   87.078125] 00000000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff                          ........................

Seems LEB 405 is empty? This is not the first time I saw
an error like this.

Is this happen after an unclean umount like power cut?

Artem, do you have any ideas?