Re: Sanitize CPU-state when switching from virtual-8086 mode to othertask

From: H. Peter Anvin
Date: Sat Dec 28 2013 - 21:38:10 EST

On 12/28/2013 02:02 PM, halfdog wrote:
> It seems that missing CPU-state sanitation during task switching
> triggers kernel-panic. This might be related to unhandled
> FPU-errors. See [1] for POC and serial console log of OOPs. Due to
> missing real 32-bit x86-hardware it is not clear, if this issue
> might be related to subtle differences in virtual-8086 mode
> handling when inside a virtualbox guest.

This oops happens inside the guest? Either way, I would be *very*
skeptical of Virtualbox in this case.

You can run a 32-bit kernel on 64-bit hardware, you know...

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at