network: check result of if_nametoindex().

When we want to get index of a ifname which does not exist, we should return a -EINVAL in this case. Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>

network: check result of if_nametoindex().
f5a49d03 · Dongsheng Yang · Stéphane Graber · c2398d17 · f5a49d03
Commit f5a49d03 authored Sep 11, 2014 by Dongsheng Yang Committed by Stéphane Graber Nov 25, 2014
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network.c src/lxc/network.c +2 -0

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--- a/src/lxc/network.c
+++ b/src/lxc/network.c
@@ -143,6 +143,8 @@ int lxc_netdev_move_by_name(const char *ifname, pid_t pid)
 		return -EINVAL;
 	index = if_nametoindex(ifname);
+	if (!index)
+		return -EINVAL;
 	return lxc_netdev_move_by_index(index, pid);
 }