[Bug 601226] [NEW] Unable to handle kernel NULL pointer dereference in ppdev module

[Tobin Davis]

Public bug reported:

During boot on a Beagleboard with latest image, the system attempts to
load the parallel port drivers (no ports exist on this system), which in
turn causes the driver to fail with an oops message and kernel dump (see
dmesg log).

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-omap 2.6.35.6.7
Regression: Yes
Reproducible: Yes
ProcVersionSignature: User Name 2.6.35-6.9-omap 2.6.35-rc3
Uname: Linux 2.6.35-6-omap armv7l
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: omap3beagle [omap3beagle], device 0: TWL4030 twl4030-0 []
   Subdevices: 1/1
   Subdevice #0: subdevice #0
Architecture: armel
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: omap3beagle [omap3beagle], device 0: TWL4030 twl4030-0 []
   Subdevices: 1/1
   Subdevice #0: subdevice #0
Date: Fri Jul  2 16:06:43 2010
Lspci:
 Error: command ['lspci', '-vvnn'] failed with exit code 1: pcilib: Cannot open /proc/bus/pci
 lspci: Cannot find any working access method.
Lsusb:
 Bus 001 Device 004: ID 05d5:6781 Super Gate Technology Co., Ltd 
 Bus 001 Device 003: ID 07a6:8511 ADMtek, Inc. ADM8511 Pegasus II Ethernet
 Bus 001 Device 002: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
ProcCmdLine: vram=12M omapfb.mode=dvi:1280x720MR-16 at 60 root=UUID=ca253fca-1a4b-4ede-aeb2-4c854c0d1db9 fixrtc
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.utf8
SourcePackage: linux

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


** Tags: apport-bug armel maverick needs-upstream-testing regression-potential ubuntu-une

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Unable to handle kernel NULL pointer dereference in ppdev module
https://bugs.launchpad.net/bugs/601226
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