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37 lines
1.3 KiB
Plaintext
37 lines
1.3 KiB
Plaintext
$NetBSD: patch-CVE-2013-4355_3,v 1.1 2013/10/01 14:54:44 drochner Exp $
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--- xen/arch/x86/hvm/io.c.orig 2013-09-10 06:42:18.000000000 +0000
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+++ xen/arch/x86/hvm/io.c 2013-09-30 15:23:07.000000000 +0000
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@@ -333,14 +333,24 @@ static int dpci_ioport_write(uint32_t mp
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data = p->data;
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if ( p->data_is_ptr )
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{
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- int ret;
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-
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- ret = hvm_copy_from_guest_phys(&data,
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- p->data + (sign * i * p->size),
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- p->size);
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- if ( (ret == HVMCOPY_gfn_paged_out) &&
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- (ret == HVMCOPY_gfn_shared) )
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+ switch ( hvm_copy_from_guest_phys(&data,
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+ p->data + sign * i * p->size,
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+ p->size) )
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+ {
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+ case HVMCOPY_okay:
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+ break;
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+ case HVMCOPY_gfn_paged_out:
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+ case HVMCOPY_gfn_shared:
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return X86EMUL_RETRY;
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+ case HVMCOPY_bad_gfn_to_mfn:
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+ data = ~0;
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+ break;
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+ case HVMCOPY_bad_gva_to_gfn:
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+ ASSERT(0);
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+ /* fall through */
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+ default:
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+ return X86EMUL_UNHANDLEABLE;
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+ }
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}
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switch ( p->size )
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