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| author | Jason Wang <jasowang@redhat.com> | 2018-12-13 05:53:37 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-12-13 08:56:19 +0300 |
| commit | 841df922417eb82c835e93d4b93eb6a68c99d599 (patch) | |
| tree | 0286f8784c5eafeda7b38db9cc989780b34387cf /drivers/vhost/net.c | |
| parent | 3b076cfe86be3784dee93cfd83d6913a9ef530ee (diff) | |
| download | linux-841df922417eb82c835e93d4b93eb6a68c99d599.tar.xz | |
vhost: make sure used idx is seen before log in vhost_add_used_n()
We miss a write barrier that guarantees used idx is updated and seen
before log. This will let userspace sync and copy used ring before
used idx is update. Fix this by adding a barrier before log_write().
Fixes: 8dd014adfea6f ("vhost-net: mergeable buffers support")
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/vhost/net.c')
0 files changed, 0 insertions, 0 deletions