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xen-changelog
[Xen-changelog] [xen-unstable] x86_64: Do not leak trampoline mapping in
# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1196862559 0
# Node ID c67d024fdd2d3527ccd08e513ca3ed3c9dcb4b68
# Parent 671ef298d491e24a5acb3f502746cd0d9342385b
x86_64: Do not leak trampoline mapping into dom0's initial address space.
Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
---
xen/arch/x86/domain_build.c | 1 +
1 files changed, 1 insertion(+)
diff -r 671ef298d491 -r c67d024fdd2d xen/arch/x86/domain_build.c
--- a/xen/arch/x86/domain_build.c Wed Dec 05 11:08:07 2007 +0000
+++ b/xen/arch/x86/domain_build.c Wed Dec 05 13:49:19 2007 +0000
@@ -646,6 +646,7 @@ int __init construct_dom0(
l4start = l4tab = page_to_virt(page);
}
copy_page(l4tab, idle_pg_table);
+ l4tab[0] = l4e_empty(); /* zap trampoline mapping */
l4tab[l4_table_offset(LINEAR_PT_VIRT_START)] =
l4e_from_paddr(__pa(l4start), __PAGE_HYPERVISOR);
l4tab[l4_table_offset(PERDOMAIN_VIRT_START)] =
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