On Thu, Jun 01, 2017 at 01:10:36PM +0200, Christoph Hellwig wrote: > Hi all, > > Rakesh reported a bug where a FLR can trivially crash his system. > The reason for that is that NVMe unbinds the driver from the PCI device > on an unrecoverable error, and that races with the reset_notify method. > > This is fairly easily fixable by taking the device lock for a slightly > longer period. Note that the other PCI error handling methods actually > have the same issue, but with them not taking the lock yet and me having > no good way to reproducibly call them I'm a little reluctant to touch > them, but it would be great if we could fix those issues as well. > > Patches 2 and 3 are cleanups in the same area and not 4.12 material, > but given that they depend on the first one I thought I'd send them > along. > > Changes since V1: > - lock over all calls to ->reset_notify Applied all three (with some updated changelogs and comments) to pci/virtualization for v4.13, thanks!
