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| author | Jan Beulich <jbeulich@suse.com> | 2013-05-02 17:08:58 +0200 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2013-05-02 17:08:58 +0200 |
| commit | 63cec00679cc65ab5d5a9447a62d5202f155b78c (patch) | |
| tree | d92467125aa1f66d509c8c60dc7f4f38774b445a /xen/drivers | |
| parent | f2ddd529337792bcb61fad259da8982be570df4d (diff) | |
| download | xen-63cec00679cc65ab5d5a9447a62d5202f155b78c.tar.gz xen-63cec00679cc65ab5d5a9447a62d5202f155b78c.tar.bz2 xen-63cec00679cc65ab5d5a9447a62d5202f155b78c.zip | |
VT-d: don't permit SVT_NO_VERIFY entries for known device types
Only in cases where we don't know what to do we should leave the IRTE
blank (suppressing all validation), but we should always log a warning
in those cases (as being insecure).
This is CVE-2013-1952 / XSA-49.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: "Zhang, Xiantao" <xiantao.zhang@intel.com>
Diffstat (limited to 'xen/drivers')
| -rw-r--r-- | xen/drivers/passthrough/vtd/intremap.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/xen/drivers/passthrough/vtd/intremap.c b/xen/drivers/passthrough/vtd/intremap.c index 880f15eab0..feaaed0d89 100644 --- a/xen/drivers/passthrough/vtd/intremap.c +++ b/xen/drivers/passthrough/vtd/intremap.c @@ -437,12 +437,9 @@ static void set_msi_source_id(struct pci_dev *pdev, struct iremap_entry *ire) { unsigned int sq; + case DEV_TYPE_PCIe_ENDPOINT: case DEV_TYPE_PCIe_BRIDGE: case DEV_TYPE_PCIe2PCI_BRIDGE: - case DEV_TYPE_LEGACY_PCI_BRIDGE: - break; - - case DEV_TYPE_PCIe_ENDPOINT: switch ( pdev->phantom_stride ) { case 1: sq = SQ_13_IGNORE_3; break; @@ -454,6 +451,8 @@ static void set_msi_source_id(struct pci_dev *pdev, struct iremap_entry *ire) break; case DEV_TYPE_PCI: + case DEV_TYPE_LEGACY_PCI_BRIDGE: + case DEV_TYPE_PCI2PCIe_BRIDGE: ret = find_upstream_bridge(seg, &bus, &devfn, &secbus); if ( ret == 0 ) /* integrated PCI device */ { @@ -465,10 +464,15 @@ static void set_msi_source_id(struct pci_dev *pdev, struct iremap_entry *ire) if ( pdev_type(seg, bus, devfn) == DEV_TYPE_PCIe2PCI_BRIDGE ) 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 ) + else set_ire_sid(ire, SVT_VERIFY_SID_SQ, SQ_ALL_16, PCI_BDF2(bus, devfn)); } + else + dprintk(XENLOG_WARNING VTDPREFIX, + "d%d: no upstream bridge for %04x:%02x:%02x.%u\n", + pdev->domain->domain_id, + seg, bus, PCI_SLOT(devfn), PCI_FUNC(devfn)); break; default: |