On Sun, 24 May 2020 15:08:19 +0530, Aneesh Kumar K.V wrote:
> With Hard Lockup watchdog, we can hit a BUG() if we take a watchdog
> interrupt when in OPAL mode. This happens in show_instructions()
> where the kernel takes the watchdog NMI IPI with MSR_IR == 0.
> With that show_instructions() updates the variable pc in the loop
> and the second iterations will result in BUG().
>
> We hit the BUG_ON due the below check in __va()
>
> [...]
Patch 1 applied to powerpc/fixes.
[1/4] powerpc: Fix kernel crash in show_instructions() w/DEBUG_VIRTUAL
https://git.kernel.org/powerpc/c/a6e2c226c3d51fd93636320e47cabc8a8f0824c5
cheers
