[Qemu-devel] [PATCH 2/3] Avoid segfault on net_tap_init() failure

[Juergen Lock]

Check for fd == -1 there.

Signed-off-by: Juergen Lock <address@hidden>

--- a/net/tap.c
+++ b/net/tap.c
@@ -400,6 +400,9 @@ int net_init_tap(QemuOpts *opts, Monitor
         }
 
         fd = net_tap_init(opts, &vnet_hdr);
+        if (fd == -1) {
+            return -1;
+        }
     }
 
     s = net_tap_fd_init(vlan, "tap", name, fd, vnet_hdr);