Comment 0 for bug 1189998

This bug is present on kernels v3.8-rc1 and beyond and was exposed by commit ecbbfd44.
To reproduce:

1) Pair a bluetooth device that is capable of being easily powered down (a phone for example)
2) Configure /etc/bluetooth/rfcomm.conf to connect to device. For example:
rfcomm0 {
        bind no;
        device XX:XX:XX:XX:XX:XX;
        channel XX;
        comment "phone";
}
3) Type 'rfcomm connect 0'.
4) On the device power down the bluetooth component or power down the device.
5) Eventually the machine will crash, I've found that exec'ing another program will cause the crash easily.

ProblemType: KernelCrash
DistroRelease: Ubuntu 13.10
Package: linux-image-3.9.0-4-generic
ProcVersionSignature: Ubuntu 3.9.0-4.9-generic 3.9.4
Uname: Linux 3.9.0-4-generic x86_64
ApportVersion: 2.10.2-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: ubuntu 1537 F.... pulseaudio
Date: Tue Jun 11 12:22:26 2013
HibernationDevice: RESUME=UUID=8c8e9f7c-b216-4ead-a5da-8e267ab136ac
InstallationDate: Installed on 2013-06-05 (5 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130605)
MachineType: LENOVO 42872WU
MarkForUpload: True
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.9.0-4-generic root=UUID=94d4ed1f-8182-4805-8d5b-6944f6f1c428 ro crashkernel=384M-2G:64M,2G-:128M debug ignore_loglevel
PulseList:
 Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
 No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-3.9.0-4-generic N/A
 linux-backports-modules-3.9.0-4-generic N/A
 linux-firmware 1.109
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/01/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 8DET55WW (1.25 )
dmi.board.asset.tag: Not Available
dmi.board.name: 42872WU
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr8DET55WW(1.25):bd11/01/2011:svnLENOVO:pn42872WU:pvrThinkPadX220:rvnLENOVO:rn42872WU:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 42872WU
dmi.product.version: ThinkPad X220
dmi.sys.vendor: LENOVO