3.2-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jan Beulich <jbeul...@suse.com>
commit 51ac8893a7a51b196501164e645583bf78138699 upstream.
... as being guest triggerable (e.g. by invoking
XEN_PCI_OP_enable_msi{,x} on a device not being MSI/MSI-X capable).
This is CVE-2013-0231 / XSA-43.
Also make the two messages uniform in both their wording and severity.
Signed-off-by: Jan Beulich <jbeul...@suse.com>
Acked-by: Ian Campbell <ian.campb...@citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.w...@oracle.com>
[bwh: Backported to 3.2: add #include <linux/ratelimited.h>, needed by
printk_ratelimited()]
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
drivers/xen/xen-pciback/pciback_ops.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
--- a/drivers/xen/xen-pciback/pciback_ops.c
+++ b/drivers/xen/xen-pciback/pciback_ops.c
@@ -8,6 +8,7 @@
#include <linux/bitops.h>
#include <xen/events.h>
#include <linux/sched.h>
+#include <linux/ratelimit.h>
#include "pciback.h"
int verbose_request;
@@ -135,7 +136,6 @@ int xen_pcibk_enable_msi(struct xen_pcib
struct pci_dev *dev, struct xen_pci_op *op)
{
struct xen_pcibk_dev_data *dev_data;
- int otherend = pdev->xdev->otherend_id;
int status;
if (unlikely(verbose_request))
@@ -144,8 +144,9 @@ int xen_pcibk_enable_msi(struct xen_pcib
status = pci_enable_msi(dev);
if (status) {
- printk(KERN_ERR "error enable msi for guest %x status %x\n",
- otherend, status);
+ pr_warn_ratelimited(DRV_NAME ": %s: error enabling MSI for
guest %u: err %d\n",
+ pci_name(dev), pdev->xdev->otherend_id,
+ status);
op->value = 0;
return XEN_PCI_ERR_op_failed;
}
@@ -223,10 +224,10 @@ int xen_pcibk_enable_msix(struct xen_pci
pci_name(dev), i,
op->msix_entries[i].vector);
}
- } else {
- printk(KERN_WARNING DRV_NAME ": %s: failed to enable MSI-X: err
%d!\n",
- pci_name(dev), result);
- }
+ } else
+ pr_warn_ratelimited(DRV_NAME ": %s: error enabling MSI-X for
guest %u: err %d!\n",
+ pci_name(dev), pdev->xdev->otherend_id,
+ result);
kfree(entries);
op->value = result;
--
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