Re: [dpdk-stable] [PATCH v4 3/3] vhost: fix fd leak in kick setup

["Xueming(Steven) Li" <xuemingl@nvidia.com>]

>-----Original Message-----
>From: Maxime Coquelin <maxime.coquelin@redhat.com>
>Sent: Friday, November 13, 2020 1:10 AM
>To: dev@dpdk.org; xuan.ding@intel.com; stephen@networkplumber.org;
>NBU-Contact-Thomas Monjalon <thomas@monjalon.net>; stable@dpdk.org;
>chenbo.xia@intel.com; Xueming(Steven) Li <xuemingl@nvidia.com>
>Cc: Maxime Coquelin <maxime.coquelin@redhat.com>
>Subject: [PATCH v4 3/3] vhost: fix fd leak in kick setup
>
>This patch fixes a file descriptor leak which happens in the error path of
>vhost_user_set_vring_kick().
>
>Fixes: 4796ad63ba1f ("examples/vhost: import userspace vhost application")
>Cc: stable@dpdk.org
>
>Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
>Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>
>---
> lib/librte_vhost/vhost_user.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
>diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c index
>23c115f994..45c8ac09da 100644
>--- a/lib/librte_vhost/vhost_user.c
>+++ b/lib/librte_vhost/vhost_user.c
>@@ -1858,8 +1858,12 @@ vhost_user_set_vring_kick(struct virtio_net **pdev,
>struct VhostUserMsg *msg,
>
> 	/* Interpret ring addresses only when ring is started. */
> 	dev = translate_ring_addresses(dev, file.index);
>-	if (!dev)
>+	if (!dev) {
>+		if (file.fd != VIRTIO_INVALID_EVENTFD)
>+			close(file.fd);
>+
> 		return RTE_VHOST_MSG_RESULT_ERR;
>+	}
>
> 	*pdev = dev;
>
>--
>2.26.2
Reviewed-by: Xueming(Steven) Li <xuemingl@nvidia.com>