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25 lines
836 B
Plaintext
25 lines
836 B
Plaintext
$NetBSD: patch-CVE-2013-4355_4,v 1.1 2013/10/01 14:54:44 drochner Exp $
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--- xen/arch/x86/hvm/vmx/realmode.c.orig 2013-09-10 06:42:18.000000000 +0000
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+++ xen/arch/x86/hvm/vmx/realmode.c 2013-09-30 15:23:07.000000000 +0000
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@@ -38,7 +38,9 @@ static void realmode_deliver_exception(
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again:
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last_byte = (vector * 4) + 3;
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- if ( idtr->limit < last_byte )
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+ if ( idtr->limit < last_byte ||
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+ hvm_copy_from_guest_phys(&cs_eip, idtr->base + vector * 4, 4) !=
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+ HVMCOPY_okay )
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{
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/* Software interrupt? */
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if ( insn_len != 0 )
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@@ -63,8 +65,6 @@ static void realmode_deliver_exception(
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}
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}
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- (void)hvm_copy_from_guest_phys(&cs_eip, idtr->base + vector * 4, 4);
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-
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frame[0] = regs->eip + insn_len;
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frame[1] = csr->sel;
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frame[2] = regs->eflags & ~X86_EFLAGS_RF;
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