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25 lines
883 B
C
25 lines
883 B
C
$NetBSD: patch-xen_arch_x86_mm_shadow_common.c,v 1.1 2014/09/26 10:39:31 bouyer Exp $
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patch for XSA-104/CVE-2014-7154, from Xen Security Advisory
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--- xen/arch/x86/mm/shadow/common.c.orig 2014-09-02 08:22:57.000000000 +0200
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+++ xen/arch/x86/mm/shadow/common.c 2014-09-26 11:18:02.000000000 +0200
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@@ -3601,7 +3601,7 @@
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int flush_tlb = 0;
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unsigned long i;
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p2m_type_t t;
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- struct sh_dirty_vram *dirty_vram = d->arch.hvm_domain.dirty_vram;
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+ struct sh_dirty_vram *dirty_vram;
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struct p2m_domain *p2m = p2m_get_hostp2m(d);
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if ( end_pfn < begin_pfn || end_pfn > p2m->max_mapped_pfn + 1 )
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@@ -3611,6 +3611,8 @@
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p2m_lock(p2m_get_hostp2m(d));
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paging_lock(d);
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+ dirty_vram = d->arch.hvm_domain.dirty_vram;
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+
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if ( dirty_vram && (!nr ||
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( begin_pfn != dirty_vram->begin_pfn
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|| end_pfn != dirty_vram->end_pfn )) )
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