You don't seem to be the only person with this problem:
http://article.gmane.org/gmane.linux.usb.general/8525
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Ubuntu Kernel Team (ubuntu-kernel-team)
Status: New => Confirmed
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BUG: unable to handle kernel NULL pointer dereference at 00000004
https://bugs.launchpad.net/bugs/260627
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