From: Andrea Parri (Microsoft) <parri.andrea@xxxxxxxxx> Sent: Monday, December 7, 2020 8:53 PM > > From: Andres Beltran <lkmlabelt@xxxxxxxxx> > > Pointers to ring-buffer packets sent by Hyper-V are used within the > guest VM. Hyper-V can send packets with erroneous values or modify > packet fields after they are processed by the guest. To defend > against these scenarios, return a copy of the incoming VMBus packet > after validating its length and offset fields in hv_pkt_iter_first(). > In this way, the packet can no longer be modified by the host. > > Signed-off-by: Andres Beltran <lkmlabelt@xxxxxxxxx> > Co-developed-by: Andrea Parri (Microsoft) <parri.andrea@xxxxxxxxx> > Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@xxxxxxxxx> > Cc: "David S. Miller" <davem@xxxxxxxxxxxxx> > Cc: Jakub Kicinski <kuba@xxxxxxxxxx> > Cc: "James E.J. Bottomley" <jejb@xxxxxxxxxxxxx> > Cc: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx> > Cc: netdev@xxxxxxxxxxxxxxx > Cc: linux-scsi@xxxxxxxxxxxxxxx > --- > drivers/hv/channel.c | 9 ++-- > drivers/hv/hv_fcopy.c | 1 + > drivers/hv/hv_kvp.c | 1 + > drivers/hv/hyperv_vmbus.h | 2 +- > drivers/hv/ring_buffer.c | 82 ++++++++++++++++++++++++++----- > drivers/net/hyperv/hyperv_net.h | 3 ++ > drivers/net/hyperv/netvsc.c | 2 + > drivers/net/hyperv/rndis_filter.c | 2 + > drivers/scsi/storvsc_drv.c | 10 ++++ > include/linux/hyperv.h | 48 +++++++++++++++--- > net/vmw_vsock/hyperv_transport.c | 4 +- > 11 files changed, 139 insertions(+), 25 deletions(-) > Reviewed-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
