If the patch series is not applied, after 6 months of raring there will
be 6 more months of saucy without the possibility to use the bluetooth
tethering facility (bluetooth DUN) offered by mobile phones. Sounds bad.

In any case if this patch set is too extensive to apply, the obvious
conclusion is that the not-too-extensive patch to apply is disabling
rfcomm altogether in 3.8, 3.9, 3.10, 3.11. As is, rfcomm is totally
broken, unusable and quite dangerous. It makes the kernel crash
systematically at every use. Furthermore, the crash is due to kernel
data being randomly rewritten with garbage, which means that the actual
crash may happen *seconds to minutes after the actual issue provoking
it* (seen > 40 sec personally).  It is a bad situation that can easily
lead to severe data loss in addition to down time.

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https://bugs.launchpad.net/bugs/1165433

Title:
  Kernel 3.8.x panics on bluetooth DUN disconnect

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