[Xen-devel] [PATCH] linux-2.6.18/x86: undo_limit_pages() must reset page count

["Jan Beulich" <JBeulich@xxxxxxxx>]

... before calling __free_pages() as it is already being called in the
context of that or similar function (which used put_page_test_zero()
first or otherwise assumes the page count is zero).

Reported-by: Daniel Kiper <dkiper@xxxxxxxxxxxx>
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/arch/i386/mm/hypervisor.c
+++ b/arch/i386/mm/hypervisor.c
@@ -437,6 +437,7 @@ static void undo_limit_pages(struct page
        BUG_ON(order > max_contig_order);
        xen_limit_pages_to_max_mfn(pages, order, 0);
        ClearPageForeign(pages);
+       init_page_count(pages);
        __free_pages(pages, order);
 }

xen-x86-undo-limit-pages.patch
Description: Text document

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