Kernel Bug/oops during boot (PowerVM LPAR w/vTPM)

[Michal Suchánek]

On Wed, 3 Jul 2019 13:17:16 +0200
Michal Suchánek <msuchanek at suse.de> wrote:

> On Wed, 3 Jul 2019 15:54:59 +0530
> Sachin Sant <sachinp at linux.vnet.ibm.com> wrote:
> 
> > Booting mainline kernel on PowerVM LPAR with vTPM enabled results
> > into a kernel crash.
> > 
> > [    0.365989] BUG: Kernel NULL pointer dereference at 0x00000012
...
> > [    0.366085] NIP [c00000000073dd80] tpm1_pcr_extend+0x130/0x230
> > [    0.366090] LR [c00000000073dcd0] tpm1_pcr_extend+0x80/0x230
...
> 
> You need to revert (or fix up) commit 0b6cf6b97b7e ("tpm: pass an array
> of tpm_extend_digest structures to tpm_pcr_extend()". At least
> reverting it fixes the issue for me.

FTR this is the revert on lkml https://lkml.org/lkml/2019/7/1/423

> 
> Thanks
> 
> Michal
>