[Xen-changelog] [xen-4.2-testing] VT-d: fix interrupt remapping source validation for devices behind legacy bridges

[Xen patchbot-4.2-testing <patchbot@xxxxxxx>]

# HG changeset patch
# User Jan Beulich <jbeulich@xxxxxxxx>
# Date 1357748160 -3600
# Node ID 2fff08507addd9626abdf3ad2f9321586236e4f2
# Parent  3444f03cf52d91e59b9cdcf7478f8dc39273f49d
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@xxxxxxxx>
xen-unstable changeset: 26340:19fd1237ff0d
xen-unstable date: Wed Jan  9 16:13:26 UTC 2013
---


diff -r 3444f03cf52d -r 2fff08507add xen/drivers/passthrough/vtd/intremap.c
--- a/xen/drivers/passthrough/vtd/intremap.c    Wed Jan 09 10:53:16 2013 +0100
+++ b/xen/drivers/passthrough/vtd/intremap.c    Wed Jan 09 17:16:00 2013 +0100
@@ -462,7 +462,7 @@ static void set_msi_source_id(struct pci
                 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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