[Bug 218339] kernel goes unresponsive if single-stepping over an instruction which writes to an address for which a hardware read/write watchpoint has been set

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https://bugzilla.kernel.org/show_bug.cgi?id=218339

--- Comment #2 from Anthony L. Eden (anthony.louis.eden@xxxxxxxxx) ---
> By "the kernel", I assume you mean the guest kernel?
Yes, the guest kernel. I can no longer interact with the VM via the serial
console. It is unresponsive.

I attached a debugger to qemu-system-x86_64 to see if qemu itself was in an
infinite loop or something but the stacktraces all looked normal.

> Is this a regression or something that has always been broken?  I.e. did this
> work on previous host kernels?
I do not know whether this has always been broken or not.

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