Re: [PATCH] kvm: fix MSR_COUNT for kvm_arch_save_regs()

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On Wed, 2009-10-14 at 15:02 -0300, Eduardo Habkost wrote:
> A new register was added to the load/save list on commit
> d283d5a65a2bdcc570065267be21848bd6fe3d78, but MSR_COUNT was not updated, leading
> to potential stack corruption on kvm_arch_save_regs().
> 
> The following registers are saved by kvm_arch_save_regs():
> 
>  1) MSR_IA32_SYSENTER_CS
>  2) MSR_IA32_SYSENTER_ESP
>  3) MSR_IA32_SYSENTER_EIP
>  4) MSR_STAR
>  5) MSR_IA32_TSC
>  6) MSR_VM_HSAVE_PA
>  7) MSR_CSTAR (x86_64 only)
>  8) MSR_KERNELGSBASE (x86_64 only)
>  9) MSR_FMASK (x86_64 only)
> 10) MSR_LSTAR (x86_64 only)
> 
> Signed-off-by: Eduardo Habkost <ehabkost@xxxxxxxxxx>

Forgot:

  Reported-by: Ulrich Obergfell <uobergfe@xxxxxxxxxx>

Looks like the fix is needed on both stable-0.10 and stable-0.11 as well
as master

Cheers,
Mark.

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