Hello,

Miles Lane wrote:
> XXX sysfs_deactivate: sd=c36ba6c0 s_sibling=6b6b6b6b s_flags=0x6b6b6b6b
> ------------[ cut here ]------------
> kernel BUG at fs/sysfs/dir.c:274!

OIC, ref counter is too low by one.  The sysfs_dirent is probably
getting freed on sysfs_drop_dentry().  Hmmm... Where did I screw up?
Can you apply the attached patch and report the log after oops?  It
shouldn't generate too much output.

Thanks.

-- 
tejun