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[PATCH net] vhost_net: don't continue to call the recvmsg when meet errors

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When we meet an error(err=-EBADFD) recvmsg, the error handling in vhost
handle_rx() will continue. This will cause a soft CPU lockup in vhost thread.

Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
---
 drivers/vhost/net.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 5dc128a..edc470b 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -717,6 +717,9 @@ static void handle_rx(struct vhost_net *net)
 			pr_debug("Discarded rx packet: "
 				 " len %d, expected %zd\n", err, sock_len);
 			vhost_discard_vq_desc(vq, headcount);
+			/* Don't continue to do, when meet errors. */
+			if (err < 0)
+				goto out;
 			continue;
 		}
 		/* Supply virtio_net_hdr if VHOST_NET_F_VIRTIO_NET_HDR */
-- 
1.9.5.msysgit.1

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[PATCH net] vhost_net: don't continue to call the recvmsg when meet errors Yunjian Wang <wangyunjian@huawei.com> - 2016-11-30 13:20 +0100
  Re: [PATCH net] vhost_net: don't continue to call the recvmsg when  meet errors Jason Wang <jasowang@redhat.com> - 2016-11-30 14:10 +0100
    Re: [PATCH net] vhost_net: don't continue to call the recvmsg when  meet errors "Michael S. Tsirkin" <mst@redhat.com> - 2016-11-30 14:50 +0100
  Re: [PATCH net] vhost_net: don't continue to call the recvmsg when  meet errors "Michael S. Tsirkin" <mst@redhat.com> - 2016-11-30 14:50 +0100
    RE: [PATCH net] vhost_net: don't continue to call the recvmsg when  meet errors wangyunjian <wangyunjian@huawei.com> - 2016-12-01 03:50 +0100
      Re: [PATCH net] vhost_net: don't continue to call the recvmsg when  meet errors Jason Wang <jasowang@redhat.com> - 2016-12-01 04:20 +0100
      Re: [PATCH net] vhost_net: don't continue to call the recvmsg when  meet errors "Michael S. Tsirkin" <mst@redhat.com> - 2016-12-01 04:30 +0100
        Re: [PATCH net] vhost_net: don't continue to call the recvmsg when  meet errors Jason Wang <jasowang@redhat.com> - 2016-12-01 04:30 +0100
          Re: [PATCH net] vhost_net: don't continue to call the recvmsg when  meet errors Jason Wang <jasowang@redhat.com> - 2016-12-01 04:40 +0100
            RE: [PATCH net] vhost_net: don't continue to call the recvmsg when  meet errors wangyunjian <wangyunjian@huawei.com> - 2016-12-01 05:50 +0100
              Re: [PATCH net] vhost_net: don't continue to call the recvmsg when  meet errors "Michael S. Tsirkin" <mst@redhat.com> - 2016-12-01 06:00 +0100
          Re: [PATCH net] vhost_net: don't continue to call the recvmsg when  meet errors "Michael S. Tsirkin" <mst@redhat.com> - 2016-12-01 04:40 +0100
    Re: [PATCH net] vhost_net: don't continue to call the recvmsg when  meet errors Jason Wang <jasowang@redhat.com> - 2016-12-01 04:20 +0100

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