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VFIO fixes for v4.18

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- Harden potential Spectre v1 issue (Gustavo A. R. Silva)
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Merge tag 'vfio-v4.18-rc6' of git://github.com/awilliam/linux-vfio

Pull VFIO fix from Alex Williamson:
 "Harden potential Spectre v1 issue (Gustavo A. R. Silva)"

* tag 'vfio-v4.18-rc6' of git://github.com/awilliam/linux-vfio:
  vfio/pci: Fix potential Spectre v1
This commit is contained in:
Linus Torvalds 2018-07-20 14:27:02 -07:00
commit 48e5aee81f
1 changed files with 4 additions and 0 deletions
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4
drivers/vfio/pci/vfio_pci.c
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@ -28,6 +28,7 @@
#include <linux/uaccess.h>
#include <linux/vfio.h>
#include <linux/vgaarb.h>
#include <linux/nospec.h>
#include "vfio_pci_private.h"
@ -727,6 +728,9 @@ static long vfio_pci_ioctl(void *device_data,
if (info.index >=
VFIO_PCI_NUM_REGIONS + vdev->num_regions)
return -EINVAL;
info.index = array_index_nospec(info.index,
VFIO_PCI_NUM_REGIONS +
vdev->num_regions);
i = info.index - VFIO_PCI_NUM_REGIONS;