On Fri, Aug 26, 2016 at 01:58:55PM +0200, Juergen Gross wrote:
> Commit 91e204d37f44913913776d0a89279721694f8b32 ("libxc: try to find
> last used pfn when migrating") introduced a bug for the case of a
> domain supporting the virtual mapped linear p2m list: the maximum pfn
> of the domain calculated from the p2m memory allocation might be too
> low.
>
> Correct this.
>
> Reported-by: Stefan Bader <stefan.ba...@canonical.com>
> Signed-off-by: Juergen Gross <jgr...@suse.com>
Tested-by: Stefan Bader <stefan.ba...@canonical.com>
Saw in <8afd11f1-3687-4c6f-200b-57eabb26d...@canonical.com>
Acked-by: Wei Liu <wei.l...@citrix.com>
> ---
> This is a backport candidate for 4.7
> ---
> tools/libxc/xc_sr_save_x86_pv.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/tools/libxc/xc_sr_save_x86_pv.c b/tools/libxc/xc_sr_save_x86_pv.c
> index 4a29460..7043409 100644
> --- a/tools/libxc/xc_sr_save_x86_pv.c
> +++ b/tools/libxc/xc_sr_save_x86_pv.c
> @@ -430,6 +430,8 @@ static int map_p2m_list(struct xc_sr_context *ctx,
> uint64_t p2m_cr3)
>
> if ( level == 2 )
> {
> + if ( saved_idx == idx_end )
> + saved_idx++;
> max_pfn = ((xen_pfn_t)saved_idx << 9) * fpp - 1;
> if ( max_pfn < ctx->x86_pv.max_pfn )
> {
> --
> 2.6.6
>
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