Re: BUG_ON(!newowner) in fixup_pi_state_owner()

[Thomas Gleixner]

On Tue, Nov 03 2020 at 17:31, Gratian Crisan wrote:
> I apologize for waking up the futex demons (and replying to my own
> email), but ...

I was staring at it already but couldn't wrap my head around it.

> Gratian Crisan writes:
> I was able to reproduce the BUG_ON(!newowner) in fixup_pi_state_owner()
> with a 5.10.0-rc1-rt1 kernel (currently testing 5.10.0-rc2-rt4).
>
> I've captured the reproducer, boot messages, OOPS, full event ftrace
> dump and some kgdb info here: https://github.com/gratian/traces
>
> The abbreviated OOPS (w/o the ftrace dump since it's too large to
> include inline; see link[1]):

Let me start at that then.

Thanks,

        tglx