tree 904d5ecac4a32d9ed7408547200fcbf3a7fe1e30
parent 0dcb82254d65f72333aa50ad626d1e9665ad093b
author Jason Wang <jasowang@redhat.com> 1533699784 +0800
committer David S. Miller <davem@davemloft.net> 1533746679 -0700

vhost: reset metadata cache when initializing new IOTLB

We need to reset metadata cache during new IOTLB initialization,
otherwise the stale pointers to previous IOTLB may be still accessed
which will lead a use after free.

Reported-by: syzbot+c51e6736a1bf614b3272@syzkaller.appspotmail.com
Fixes: f88949138058 ("vhost: introduce O(1) vq metadata cache")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>