[PATCH 3.18 45/47] vfio/pci: Fix integer overflows, bitmask check

3.18-stable review patch. If anyone has any objections, please let me know. -- From: Vlad Tsyrklevich commit 05692d7005a364add85c6e25a6c4447ce08f913a upstream. The VFIO_DEVICE_SET_IRQS ioctl did not sufficiently sanitize user-supplied integers,

[PATCH 3.18 45/47] vfio/pci: Fix integer overflows, bitmask check

3.18-stable review patch. If anyone has any objections, please let me know. -- From: Vlad Tsyrklevich commit 05692d7005a364add85c6e25a6c4447ce08f913a upstream. The VFIO_DEVICE_SET_IRQS ioctl did not sufficiently sanitize user-supplied integers, potentially allowing memory