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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-09 12:07:01 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-09 12:07:01 -0700 |
| commit | 43ecdb0d31cf63d99d060af0585bf59be7fafcb2 (patch) | |
| tree | cc2892b7c810ea4b03db93f1177f498fcdc166a8 | |
| parent | 27387dd8c62d24140d80382918aff69d4e0821ce (diff) | |
| parent | 904c680c7bf016a8619a045850937427f8d7368c (diff) | |
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
| -rw-r--r-- | drivers/vfio/pci/vfio_pci.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c index 8189cb6a86a..7abc5c81af2 100644 --- a/drivers/vfio/pci/vfio_pci.c +++ b/drivers/vfio/pci/vfio_pci.c @@ -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), |