drivers/vfio/pci/vfio_pci_intrs.c in the Linux kernel through 4.8.11 misuses the kzalloc function, which allows local users to cause a denial of service (integer overflow) or have unspecified other impact by leveraging access to a vfio PCI device file.
http://rhn.redhat.com/errata/RHSA-2017-0386.html
http://rhn.redhat.com/errata/RHSA-2017-0387.html
https://bugzilla.redhat.com/show_bug.cgi?id=1389259
https://github.com/torvalds/linux/commit/05692d7005a364add85c6e25a6c4447ce08f913a