Hi,
      I have got a similar question with yaffs_nandsim problem reported by
shizheng and HyoGi sim in May, 2008. I use yaffs in Linux 2.6.23. The kernel
bug happened at fs/yaffs2/yaffs_mtdif2.c:63!
How can I fix the bug?Thanks. 
    
    Best Wishes.
    LiuShu