diff options
| author | Asias He | 2013-05-07 14:54:33 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin | 2013-07-11 15:36:45 +0300 |
| commit | 2e26af79b7e24e9644a6c16ad4dca61501fb4b3f (patch) | |
| tree | 82bef64341c45ba98f4dc1154afbbe65c64d51cd /drivers/vhost | |
| parent | 09a34c8404c1d4c5782de319c02e1d742c57875c (diff) | |
vhost-net: Always access vq->private_data under vq mutex
Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vhost')
| -rw-r--r-- | drivers/vhost/net.c | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index 027be91db139..99f8d63491aa 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -346,12 +346,11 @@ static void handle_tx(struct vhost_net *net) struct vhost_net_ubuf_ref *uninitialized_var(ubufs); bool zcopy, zcopy_used; - /* TODO: check that we are running from vhost_worker? */ - sock = rcu_dereference_check(vq->private_data, 1); + mutex_lock(&vq->mutex); + sock = vq->private_data; if (!sock) - return; + goto out; - mutex_lock(&vq->mutex); vhost_disable_notify(&net->dev, vq); hdr_size = nvq->vhost_hlen; @@ -461,7 +460,7 @@ static void handle_tx(struct vhost_net *net) break; } } - +out: mutex_unlock(&vq->mutex); } @@ -570,14 +569,14 @@ static void handle_rx(struct vhost_net *net) s16 headcount; size_t vhost_hlen, sock_hlen; size_t vhost_len, sock_len; - /* TODO: check that we are running from vhost_worker? */ - struct socket *sock = rcu_dereference_check(vq->private_data, 1); - - if (!sock) - return; + struct socket *sock; mutex_lock(&vq->mutex); + sock = vq->private_data; + if (!sock) + goto out; vhost_disable_notify(&net->dev, vq); + vhost_hlen = nvq->vhost_hlen; sock_hlen = nvq->sock_hlen; @@ -652,7 +651,7 @@ static void handle_rx(struct vhost_net *net) break; } } - +out: mutex_unlock(&vq->mutex); } |