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vfio overflow fix for v3.9-rc7

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Merge tag 'vfio-v3.9-rc7' of git://github.com/awilliam/linux-vfio

Pull vfio overflow fix from Alex Williamson.

* tag 'vfio-v3.9-rc7' of git://github.com/awilliam/linux-vfio:
  vfio-pci: Fix possible integer overflow
This commit is contained in:
Linus Torvalds 2013-04-09 12:07:01 -07:00
commit 43ecdb0d31
1 changed files with 2 additions and 1 deletions
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3
drivers/vfio/pci/vfio_pci.c
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@ -346,6 +346,7 @@ static long vfio_pci_ioctl(void *device_data,
if (!(hdr.flags & VFIO_IRQ_SET_DATA_NONE)) {
size_t size;
int max = vfio_pci_get_irq_count(vdev, hdr.index);
if (hdr.flags & VFIO_IRQ_SET_DATA_BOOL)
size = sizeof(uint8_t);
@ -355,7 +356,7 @@ static long vfio_pci_ioctl(void *device_data,
return -EINVAL;
if (hdr.argsz - minsz < hdr.count * size ||
hdr.count > vfio_pci_get_irq_count(vdev, hdr.index))
hdr.start >= max || hdr.start + hdr.count > max)
return -EINVAL;
data = memdup_user((void __user *)(arg + minsz),