On 2021/2/23 7:50 下午, Xie Yongji wrote:
Use vhost_dev->mutex to protect vhost device iotlb from
concurrent access.
Fixes: 4c8cf318("vhost: introduce vDPA-based backend")
Signed-off-by: Xie Yongji <xieyongji@xxxxxxxxxxxxx>
---
drivers/vhost/vdpa.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index c50079dfb281..5500e3bf05c1 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -723,6 +723,7 @@ static int vhost_vdpa_process_iotlb_msg(struct vhost_dev *dev,
if (r)
return r;
+ mutex_lock(&dev->mutex);
I think this should be done before the vhost_dev_check_owner() above.
Thanks
switch (msg->type) {
case VHOST_IOTLB_UPDATE:
r = vhost_vdpa_process_iotlb_update(v, msg);
@@ -742,6 +743,7 @@ static int vhost_vdpa_process_iotlb_msg(struct vhost_dev *dev,
r = -EINVAL;
break;
}
+ mutex_unlock(&dev->mutex);
return r;
}
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