On Thu, Nov 1, 2018 at 2:19 PM, Michael S. Tsirkin <mst@xxxxxxxxxx> wrote: > The following changes since commit 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d: > > Linux 4.19 (2018-10-22 07:37:37 +0100) > > are available in the Git repository at: > > git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git tags/for_linus > > for you to fetch changes up to 79f800b2e76923cd8ce0aa659cb5c019d9643bc9: > > MAINTAINERS: remove reference to bogus vsock file (2018-10-24 21:16:14 -0400) > > ---------------------------------------------------------------- > virtio, vhost: fixes, tweaks > > virtio balloon page hinting support > vhost scsi control queue > > misc fixes. > > Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx> > > ---------------------------------------------------------------- > Bijan Mottahedeh (3): > vhost/scsi: Respond to control queue operations +static void +vhost_scsi_send_tmf_resp(struct vhost_scsi *vs, + struct vhost_virtqueue *vq, + int head, unsigned int out) +{ + struct virtio_scsi_ctrl_tmf_resp __user *resp; + struct virtio_scsi_ctrl_tmf_resp rsp; + int ret; + + pr_debug("%s\n", __func__); + memset(&rsp, 0, sizeof(rsp)); + rsp.response = VIRTIO_SCSI_S_FUNCTION_REJECTED; + resp = vq->iov[out].iov_base; + ret = __copy_to_user(resp, &rsp, sizeof(rsp)); Is it actually safe to trust that iov_base has passed an earlier access_ok() check here? Why not just use copy_to_user() instead? -Kees > vhost/scsi: Extract common handling code from control queue handler > vhost/scsi: Use common handling code in request queue handler > > Greg Edwards (1): > vhost/scsi: truncate T10 PI iov_iter to prot_bytes > > Lénaïc Huard (1): > kvm_config: add CONFIG_VIRTIO_MENU > > Stefan Hajnoczi (1): > MAINTAINERS: remove reference to bogus vsock file > > Wei Wang (3): > virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT > mm/page_poison: expose page_poisoning_enabled to kernel modules > virtio-balloon: VIRTIO_BALLOON_F_PAGE_POISON > > MAINTAINERS | 1 - > drivers/vhost/scsi.c | 426 ++++++++++++++++++++++++++++-------- > drivers/virtio/virtio_balloon.c | 380 +++++++++++++++++++++++++++++--- > include/uapi/linux/virtio_balloon.h | 8 + > kernel/configs/kvm_guest.config | 1 + > mm/page_poison.c | 6 + > 6 files changed, 688 insertions(+), 134 deletions(-) -- Kees Cook