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Groups > linux.kernel > #1287401
| From | Luis Henriques <luis.henriques@canonical.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 3.16.y-ckt 014/126] x86/xen: Do not clip xen_e820_map to xen_e820_map_entries when sanitizing map |
| Date | 2015-12-09 11:50 +0100 |
| Message-ID | <qDKtQ-7f3-23@gated-at.bofh.it> (permalink) |
| References | <qDJo5-6xK-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
3.16.7-ckt21 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Malcolm Crossley <malcolm.crossley@citrix.com> commit 64c98e7f49100b637cd20a6c63508caed6bbba7a upstream. Sanitizing the e820 map may produce extra E820 entries which would result in the topmost E820 entries being removed. The removed entries would typically include the top E820 usable RAM region and thus result in the domain having signicantly less RAM available to it. Fix by allowing sanitize_e820_map to use the full size of the allocated E820 array. Signed-off-by: Malcolm Crossley <malcolm.crossley@citrix.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com> [ luis: backported to 3.16: - use 'map' instead of 'xen_e820_map_entries' ] Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- arch/x86/xen/setup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index 2e555163c2fe..dca94c650d6a 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -385,7 +385,7 @@ char * __init xen_memory_setup(void) xen_ignore_unusable(map, memmap.nr_entries); /* Make sure the Xen-supplied memory map is well-ordered. */ - sanitize_e820_map(map, memmap.nr_entries, &memmap.nr_entries); + sanitize_e820_map(map, ARRAY_SIZE(map), &memmap.nr_entries); max_pages = xen_get_max_pages(); if (max_pages > max_pfn) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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[PATCH 3.16.y-ckt 014/126] x86/xen: Do not clip xen_e820_map to xen_e820_map_entries when sanitizing map Luis Henriques <luis.henriques@canonical.com> - 2015-12-09 11:50 +0100
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