From 6b37c87c96a5b148685e8e6bf09d0aca953cb1a8 Mon Sep 17 00:00:00 2001
From: "Michael S. Tsirkin" <mst@redhat.com>
Date: Tue, 14 Sep 2010 13:48:17 +0200
Subject: [PATCH] vhost: fix infinite loop on error path

file.index is unsigned, hence 'while (--file.index >= 0)'
will loop > forever. Change to while (file.index-- > 0).

Reported-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/vhost_net.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/vhost_net.c b/hw/vhost_net.c
index 4a7b8194f2..c068be1f54 100644
--- a/hw/vhost_net.c
+++ b/hw/vhost_net.c
@@ -151,7 +151,7 @@ int vhost_net_start(struct vhost_net *net,
     return 0;
 fail:
     file.fd = -1;
-    while (--file.index >= 0) {
+    while (file.index-- > 0) {
         int r = ioctl(net->dev.control, VHOST_NET_SET_BACKEND, &file);
         assert(r >= 0);
     }