Re: [linux-next] PPC Lpar fail to boot with error hid: module verification failed: signature and/or required key missing - tainting kernel

[Jiri Kosina <jikos@kernel.org>]

On Thu, 25 May 2017, Abdul Haleem wrote:

> Hi,
> 
> Test : boot
> Machine : Power 8 PowerVM LPAR
> Kernel version : 4.12.0-rc2-next-20170524
> Toolchain : gcc version 5.2.1
> Config : attached
> 
> next-20170517 was last good version where we did not see the failure.
> from next-20170519 to today's next-20170524, we see the problem
> everyday.
> 
> Kernels fails to boot on PowerVM LPAR with these errors;
> 
> Freeing unused kernel memory: 4416K
> This architecture does not have kernel memory protection.
> Loading, please wait...
> mount: mounting udev on /dev failed: Device or resource busy
> W: devtmpfs not available, falling back to tmpfs for /dev
> starting version 222
> Begin: Loading essential drivers ... done.
> Begin: Running /scripts/init-premount ... done.
> Begin: Mounting root file system ... Begin:
> Running /scripts/local-top ... done.
> chvt: can't open console
> Gave up waiting for root device.  Common problems:
>  - Boot args (cat /proc/cmdline)
>    - Check rootdelay= (did the system wait long enough?)
>    - Check root= (did the system wait for the right device?)
>  - Missing modules (cat /proc/modules; ls /dev)
> chvt: can't open console
> ALERT!  /dev/disk/by-uuid/3aee8de3-5b8f-4a89-9e89-108efe213983 does not
> exist.  Dropping to a shell!

Seems like the by-uuid node for your harddrive containing rootfs didn't 
show up.

The EBUSY from mount(/dev) seems like the biggest suspect.

These:

> hid: module verification failed: signature and/or required key missing -
> tainting kernel
> hidraw: raw HID events driver (C) Jiri Kosina
> usbcore: registered new interface driver usbhid
> usbhid: USB HID core driver

are for sure unrelated.

Please focus on figuring out why mounting /dev doesn't succeed.

-- 
Jiri Kosina
SUSE Labs