On Wed, Jan 04, 2017 at 04:47:03PM +0100, 王金浦 wrote: > This sounds scary. > Could you share how to reproduce it, this should go into stable if > it's the case.
Step 1: Build your kernel with CONFIG_VMAP_STACK=y Step 2: issue a SG_IO ioctl, e.g. sg_inq /dev/vda
