[Bug 660237] [NEW] ce at 00000015 rfcomm close followed by open triggers BUG: unable to handle kernel NULL pointer dereference at 00000015

[lent]

Public bug reported:

After using pppd via wvdial over bluetooth to a tethered phone, the pppd connection was manually terminated by a Control-C to the wvdial process.  Upon redialing with wvdial, the bug is triggered.  The bug seems to be related to the rfcomm_dlc_close
followed by a later rfcomm_dlc_open .

ProblemType: KernelOops
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-22-generic 2.6.35-22.33
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Annotation: Your system might become unstable now and might need to be restarted.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  lent       1578 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf7db8000 irq 44'
   Mixer name	: 'Realtek ALC269'
   Components	: 'HDA:10ec0269,104383ce,00100004'
   Controls      : 10
   Simple ctrls  : 6
Date: Wed Oct 13 19:15:02 2010
Failure: oops
HibernationDevice: RESUME=UUID=e3ad96b2-c0a8-4433-8d04-50d2e3c967b4
InstallationMedia: Ubuntu-Netbook-Remix 9.10 "Karmic Koala" - Release i386 (20091028.4)
MachineType: ASUSTeK Computer INC. 1005HA
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-22-generic root=UUID=cf74d3f3-d8d8-4c5c-b59d-b6be12838571 ro
RelatedPackageVersions: linux-firmware 1.38
SourcePackage: linux
Title: ce at 00000015
dmi.bios.date: 02/26/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1401
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 1005HA
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: x.xx
dmi.chassis.asset.tag: 0x00000000
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer INC.
dmi.chassis.version: x.x
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1401:bd02/26/2010:svnASUSTeKComputerINC.:pn1005HA:pvrx.x:rvnASUSTeKComputerINC.:rn1005HA:rvrx.xx:cvnASUSTeKComputerINC.:ct10:cvrx.x:
dmi.product.name: 1005HA
dmi.product.version: x.x
dmi.sys.vendor: ASUSTeK Computer INC.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-kerneloops i386 kernel-net kernel-oops maverick needs-upstream-testing regression-potential ubuntu-une

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ce at 00000015 rfcomm close followed by open triggers BUG: unable to handle kernel NULL pointer dereference at 00000015
https://bugs.launchpad.net/bugs/660237
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