From patchwork Fri Nov 20 22:23:03 2009
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Subject: [2/3] Avoid segfault on net_tap_init() failure
Date: Fri, 20 Nov 2009 12:23:03 -0000
From: Juergen Lock <nox@jelal.kn-bremen.de>
X-Patchwork-Id: 38946
Message-Id: <20091120222303.GA16486@triton8.kn-bremen.de>
To: qemu-devel@nongnu.org

Check for fd == -1 there.

Signed-off-by: Juergen Lock <nox@jelal.kn-bremen.de>


--- 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);