RE: [PATCH v3] x86/fault: Send a SIGBUS to user process always for hwpoison page access.

[Luck, Tony]

> I think we need to at least fix the existing bug before we add more
> signals.  AFAICS the MCE_IN_KERNEL_COPYIN code is busted for kernel
> threads.

Can a kernel thread do get_user() or copy_from_user()?  Do we have kernel threads
that have an associated user address space to copy from?

-Tony