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(parent: 0dcb822) | patch
vhost: reset metadata cache when initializing new IOTLB
authorJason Wang <jasowang@redhat.com>
Wed, 8 Aug 2018 03:43:04 +0000 (11:43 +0800)
committerDavid S. Miller <davem@davemloft.net>
Wed, 8 Aug 2018 16:44:39 +0000 (09:44 -0700)
commitb13f9c6364373a1b9f71e9846dc4fb199296f926
tree904d5ecac4a32d9ed7408547200fcbf3a7fe1e30tree | snapshot
parent0dcb82254d65f72333aa50ad626d1e9665ad093bcommit | diff
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>
drivers/vhost/vhost.c diff | blob | history
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