Re: [syzbot] [kernel?] general protection fault in timers_dead_cpu

[Borislav Petkov]

On Mon, Aug 17, 2026 at 11:14:35PM +0200, Thomas Gleixner wrote:
>  timers_dead_cpu()
>    migrate timer to CPU0
>    
>    // Migrates the MCE timer of CPU1, which is a bug in itself

Stupid question: can we prevent this?

As in, this timer is not migratable, do not migrate it.

But then what do you do with a timer which is not migratable and its CPU goes
offline?

Perhaps cancel it...

It won't matter in the MCE case, that's for sure.

Anyway, just some musings from reading this...

-- 
Regards/Gruss,
    Boris.

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