[PATCH net V2 0/4] Fix various issue of vhost

From: Jason Wang
Date: Wed Dec 12 2018 - 05:08:30 EST


This series tries to fix various issues of vhost:

- Patch 1 adds a missing write barrier between used idx updating and
- Patch 2-3 brings back the protection of device IOTLB through vq
mutex, this fixes possible use after free in device IOTLB entries.
- Patch 4-7 fixes the diry page logging when device IOTLB is
enabled. We should done through GPA instead of GIOVA, this was done
through intorudce HVA->GPA reverse mapping and convert HVA to GPA
during logging dirty pages.

Please consider them for -stable.


Changes from V1:
- silent compiler warning for 32bit.
- use mutex_trylock() on slowpath instead of mutex_lock() even on fast

Jason Wang (4):
vhost: make sure used idx is seen before log in vhost_add_used_n()
vhost_net: switch to use mutex_trylock() in vhost_net_busy_poll()
Revert "net: vhost: lock the vqs one by one"
vhost: log dirty page correctly

drivers/vhost/net.c | 11 ++++-
drivers/vhost/vhost.c | 102 ++++++++++++++++++++++++++++++++++--------
drivers/vhost/vhost.h | 3 +-
3 files changed, 95 insertions(+), 21 deletions(-)