[RFC,1/5] vhost: fix missing virtqueue lock protection
Commit Message
From: Maxime Coquelin <maxime.coquelin@redhat.com>
This patch ensures virtqueue metadata are not being
modified while rte_vhost_vring_call() is executed.
Fixes: 6c299bb7322f ("vhost: introduce vring call API")
Cc: stable@dpdk.org
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Reviewed-by: David Marchand <david.marchand@redhat.com>
---
This is the same as: https://patchwork.dpdk.org/project/dpdk/patch/20220324124638.32672-2-maxime.coquelin@redhat.com/
---
lib/vhost/vhost.c | 4 ++++
1 file changed, 4 insertions(+)
@@ -1291,11 +1291,15 @@ rte_vhost_vring_call(int vid, uint16_t vring_idx)
if (!vq)
return -1;
+ rte_spinlock_lock(&vq->access_lock);
+
if (vq_is_packed(dev))
vhost_vring_call_packed(dev, vq);
else
vhost_vring_call_split(dev, vq);
+ rte_spinlock_unlock(&vq->access_lock);
+
return 0;
}