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VT-d: fix interrupt remapping source validation for devices behind legacy bridges
Using SVT_VERIFY_BUS here doesn't make sense;
native Linux also uses SVT_VERIFY_SID_SQ here instead.
This is XSA-33 / CVE-2012-5634.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- xen/drivers/passthrough/vtd/intremap.c
+++ xen/drivers/passthrough/vtd/intremap.c
@@ -466,7 +466,7 @@ static void set_msi_source_id(struct pci_dev *pdev, struct iremap_entry *ire)
set_ire_sid(ire, SVT_VERIFY_BUS, SQ_ALL_16,
(bus << 8) | pdev->bus);
else if ( pdev_type(seg, bus, devfn) == DEV_TYPE_LEGACY_PCI_BRIDGE )
- set_ire_sid(ire, SVT_VERIFY_BUS, SQ_ALL_16,
+ set_ire_sid(ire, SVT_VERIFY_SID_SQ, SQ_ALL_16,
PCI_BDF2(bus, devfn));
}
break;
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