Adrian Bunk wrote:

Subject    : Bluetooth RFComm locks up the machine  (device_move() related)
References : http://lkml.org/lkml/2007/3/4/64
Submitter  : Mark Lord [off-list ref]
Caused-By  : Marcel Holtmann [off-list ref]
             commit c1a3313698895d8ad4760f98642007bf236af2e8
Status     : unknown

A 2-line patch exists for fs/sysfs/dir.c to address this.
Waiting on Greg to apply it or substitute something prettier.  ;)

Cheers