Kernel 5.0.0-8 unable to handle kernel NULL pointer dereference at 0000000000000000

[Hans P. Möller]

With Kernel 5.0.0-8 I have strange behaivour. I have no wifi and no sound, typing sudo doesn't work.
kern.log attached, include a boot with kernel 5 and one with 4.19 (which works ok)

[Hans P. Möller (hmollercl)]

forgot to add info about the audio and wifi:
*-multimedia
             description: Audio device
             product: NM10/ICH7 Family High Definition Audio Controller
             vendor: Intel Corporation
             physical id: 1b
             bus info: pci@0000:00:1b.0
             version: 01
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi pciexpress bus_master cap_list
             configuration: driver=snd_hda_intel latency=0
             resources: irq:25 memory:efebc000-efebffff
*-network
                description: Wireless interface
                product: PRO/Wireless 3945ABG [Golan] Network Connection
                vendor: Intel Corporation
                physical id: 0
                bus info: pci@0000:0c:00.0
                logical name: wlp12s0
                version: 02
                serial: 00:18:de:8a:64:ec
                width: 32 bits
                clock: 33MHz
                capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
                configuration: broadcast=yes driver=iwl3945 driverversion=4.19.0-13-generic firmware=15.32.2.9 ip=192.168.0.18 latency=0 link=yes multicast=yes wireless=IEEE 802.11
                resources: irq:24 memory:efdff000-efdfffff

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1822913

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Kai-Heng Feng (kaihengfeng)]

Dupe of LP: #1821564?

[Hans P. Möller (hmollercl)]

I cannot run apport-collect because when I have this issue I don't have wifi connectiom. I will try to connect via cable an do apport-collect, but It will take some time. Giving that 19.04 with Kernel 5 is almost ready to be delivered, I will change to confirm anyway.

I'm not sure is a dupe of #1821564 because it's a different Kernel (5) and in 4.19 it works ok, symptoms are very similar though.

[Hans P. Möller (hmollercl)]

I saw in the comments that #1821564 was with kernel 5 it might be a dupe of it then.

[Kai-Heng Feng (kaihengfeng)]

If possible, please follow https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1821564/comments/4

[Hans P. Möller (hmollercl)]

problem is solved in kernel 5.1.0-050100rc3-generic
Is it necessary the bisect?

[Maurizio Pellegrino (mauro5589)]

Exactly same issues here.
I tried live version of Ubuntu 19.04 with Kernel 5.0.0-13-generic and:

- I have no wifi;
- I have no sound;
- Sudo command stuck on terminal.

No one of these issues until Kernel 4.19.

Info:

*-network
                description: Wireless interface
                product: PRO/Wireless 3945ABG [Golan] Network Connection
                vendor: Intel Corporation
                physical id: 0
                bus info: pci@0000:05:00.0
                logical name: wlp5s0
                version: 02
                serial: 00:19:d2:04:51:06
                width: 32 bits
                clock: 33MHz
                capabilities: bus_master cap_list ethernet physical wireless
                configuration: broadcast=yes driver=iwl3945 driverversion=4.15.0-47-generic firmware=15.32.2.9 ip=192.168.1.77 latency=0 link=yes multicast=yes wireless=IEEE 802.11
                resources: irq:25 memory:d2100000-d2100fff

        *-multimedia
             description: Audio device
             product: NM10/ICH7 Family High Definition Audio Controller
             vendor: Intel Corporation
             physical id: 1b
             bus info: pci@0000:00:1b.0
             version: 02
             width: 64 bits
             clock: 33MHz
             capabilities: bus_master cap_list
             configuration: driver=snd_hda_intel latency=0
             resources: irq:26 memory:d2400000-d2403fff

[Maurizio Pellegrino (mauro5589)]

Exactly same issues on live version of Fedora 30 Beta with the same version of Kernel.

[Hans P. Möller (hmollercl)]

@Maurizio, could you test a newer Kernel? 5.1 for example to see if it's already solved, it is in my case.

[Maurizio Pellegrino (mauro5589)]

@Hans, since Ubuntu 19.10 still has Kernel 5.0, i tried live version of Fedora Rawhide with Kernel 5.1.0-0.rc6 and i can confirm you that there are no one of issues listed above.