crash due to kernel NULL pointer around uio

[Christian Ehrhardt ]

Hi,
the system continued just fine after this crash happened on my Yakkety Test system.
In fact I found that accidentally when running dmesg for something else.

For now I primarily wanted to collect data before loosing it due to a reboot.

I ran the same workload multiple times before without that anywhere in the log before.
I checked what else happened at the time and it seems that this was caused by an DPDK enabled openvswitch that I stopped in the cleanup for the next test.

That process before was interrupted being only half setup due to an issue in my setup script.
But I had cases like this a lot and never hit the issue.

So for now if nothing obvious to you is found please consider this just a data store to find it again if more similar cases show up.

Since there was no crash, full stop or anything I couldn't provide any dump data (at least I know now way that would still help)

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: linux-image-4.8.0-26-generic 4.8.0-26.28
ProcVersionSignature: User Name 4.8.0-26.28-generic 4.8.0
Uname: Linux 4.8.0-26-generic x86_64
AlsaDevices:
 total 0
 crw-rw---- 1 root audio 116, 1 Oct 24 08:43 seq
 crw-rw---- 1 root audio 116, 33 Oct 24 08:43 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
Date: Mon Oct 24 13:35:08 2016
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
MachineType: HP ProLiant DL360 Gen9
PciMultimedia:

ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-26-generic root=UUID=a7984629-a273-4d89-9dc6-8f2e02f573a3 ro --- console=ttyS1,115200
RelatedPackageVersions:
 linux-restricted-modules-4.8.0-26-generic N/A
 linux-backports-modules-4.8.0-26-generic N/A
 linux-firmware 1.161
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/05/2015
dmi.bios.vendor: HP
dmi.bios.version: P89
dmi.chassis.type: 23
dmi.chassis.vendor: HP
dmi.modalias: dmi:bvnHP:bvrP89:bd03/05/2015:svnHP:pnProLiantDL360Gen9:pvr:cvnHP:ct23:cvr:
dmi.product.name: ProLiant DL360 Gen9
dmi.sys.vendor: HP

[Brad Figg (brad-figg)]

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