vhost: fix slave request fd leak

We need to close the old slave request fd if any first
before taking the new one.

Fixes: 275c3f944730 ("vhost: support slave requests channel")
Cc: stable@dpdk.org
Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 0b72648..f468436 100644 (file)
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1564,6 +1564,9 @@ vhost_user_set_req_fd(struct virtio_net **pdev, struct VhostUserMsg *msg,
                return RTE_VHOST_MSG_RESULT_ERR;
        }
 
+       if (dev->slave_req_fd >= 0)
+               close(dev->slave_req_fd);
+
        dev->slave_req_fd = fd;
 
        return RTE_VHOST_MSG_RESULT_OK;