From: Jan Beulich Date: Wed, 5 Apr 2017 14:39:53 +0000 (+0200) Subject: memory: don't hand MFN info to translated guests X-Git-Tag: archive/raspbian/4.11.1-1+rpi1~1^2~66^2~2354 X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=d18627583df28facd9af473ea1ac4a56e93e6ea9;p=xen.git memory: don't hand MFN info to translated guests We shouldn't hand MFN info back from increase-reservation for translated domains, just like we don't for populate-physmap and memory-exchange. For full symmetry also check for a NULL guest handle in populate_physmap() (but note this makes no sense in memory_exchange(), as there the array is also an input). Signed-off-by: Jan Beulich Reviewed-by: Andrew Cooper Released-acked-by: Julien Grall --- diff --git a/xen/common/memory.c b/xen/common/memory.c index bed43e236d..52879e7438 100644 --- a/xen/common/memory.c +++ b/xen/common/memory.c @@ -122,7 +122,8 @@ static void increase_reservation(struct memop_args *a) } /* Inform the domain of the new page's machine address. */ - if ( !guest_handle_is_null(a->extent_list) ) + if ( !paging_mode_translate(d) && + !guest_handle_is_null(a->extent_list) ) { mfn = page_to_mfn(page); if ( unlikely(__copy_to_guest_offset(a->extent_list, i, &mfn, 1)) ) @@ -238,7 +239,8 @@ static void populate_physmap(struct memop_args *a) guest_physmap_add_page(d, _gfn(gpfn), _mfn(mfn), a->extent_order); - if ( !paging_mode_translate(d) ) + if ( !paging_mode_translate(d) && + !guest_handle_is_null(a->extent_list) ) { for ( j = 0; j < (1U << a->extent_order); j++ ) set_gpfn_from_mfn(mfn + j, gpfn + j);