[Xen-devel] [PATCH 4.0-testing 05/10] VT-d: fix interrupt remapping source validation for devices behind legacy bridges

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

From: Jan Beulich <jbeulich@xxxxxxxx>

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@xxxxxxxx>
xen-unstable changeset: 26340:19fd1237ff0d
xen-unstable date: Wed Jan  9 16:13:26 UTC 2013
---
 xen/drivers/passthrough/vtd/intremap.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/xen/drivers/passthrough/vtd/intremap.c 
b/xen/drivers/passthrough/vtd/intremap.c
index 006fdd9..663c1d0 100644
--- a/xen/drivers/passthrough/vtd/intremap.c
+++ b/xen/drivers/passthrough/vtd/intremap.c
@@ -502,7 +502,7 @@ 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(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;
-- 
1.7.2.5


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