On Tue, Oct 06, 2015 at 11:23:11AM +0300, Vlad Zolotarov wrote: > Michael, how this or any other related patch is related to the problem u r > describing? > The above ability is there for years and if memory serves me > well it was u who wrote uio_pci_generic with this "security flaw". ;)
I answered all this already. This patch enables bus mastering, enables MSI or MSI-X, and requires userspace to map the MSI-X table and read/write the config space. This means that a single userspace bug is enough to corrupt kernel memory. uio_pci_generic does not enable bus mastering or MSI, and it might be a good idea to have uio_pci_generic block access to MSI/MSI-X config. -- MST
