Re: [Xen-devel] KEXEC: fix kexec_get_range_compat to fail vocally

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 05.12.11 at 12:35, Andrew Cooper <andrew.cooper3@xxxxxxxxxx> wrote:
> I am not sure that this is the only instance, but it is really not
> acceptable to hand truncated pointers or sizes for physical memory to dom0.

While I agree to the change, I think we also ought to add a new flavor
of KEXEC_CMD_kexec_get_range that is 64-bit capable even for a
32-bit Dom0.

Both under the assumption that apart from the truncation nothing
prevents addresses above the 4G boundary from being usable with
a 32-bit kernel for at least one of the ranges (probably only
KEXEC_RANGE_MA_CPU and KEXEC_RANGE_MA_VMCOREINFO are
candidates for this on x86).

Jan


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