From 6f6f9512ea915009abeb6a4c5f204d4c25f090e0 Mon Sep 17 00:00:00 2001
From: Victor Kaplansky <victork@redhat.com>
Date: Tue, 1 Dec 2015 15:32:26 +0200
Subject: [PATCH] vhost-user: verify that number of queues is non-zero

Fix QEMU crash when -netdev type=vhost-user,queues=n is passed
with zero number of queues.

Signed-off-by: Victor Kaplansky <victork@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
---
 net/vhost-user.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/vhost-user.c b/net/vhost-user.c
index 5071602e9b..b368a90219 100644
--- a/net/vhost-user.c
+++ b/net/vhost-user.c
@@ -316,6 +316,11 @@ int net_init_vhost_user(const NetClientOptions *opts, const char *name,
     }
 
     queues = vhost_user_opts->has_queues ? vhost_user_opts->queues : 1;
+    if (queues < 1) {
+        error_setg(errp,
+                   "vhost-user number of queues must be bigger than zero");
+        return -1;
+    }
 
     return net_vhost_user_init(peer, "vhost_user", name, chr, queues);
 }
-- 
2.11.4.GIT