Commit 8db99e57 authored by Sascha Hlusiak's avatar Sascha Hlusiak Committed by David S. Miller

sit: Fail to create tunnel, if it already exists

When locating the tunnel, do not continue if it is found. Otherwise
a different tunnel with similar configuration would be returned and
parts could be overwritten.
Signed-off-by: default avatarSascha Hlusiak <contact@saschahlusiak.de>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9643f455
...@@ -165,8 +165,13 @@ static struct ip_tunnel * ipip6_tunnel_locate(struct net *net, ...@@ -165,8 +165,13 @@ static struct ip_tunnel * ipip6_tunnel_locate(struct net *net,
struct sit_net *sitn = net_generic(net, sit_net_id); struct sit_net *sitn = net_generic(net, sit_net_id);
for (tp = __ipip6_bucket(sitn, parms); (t = *tp) != NULL; tp = &t->next) { for (tp = __ipip6_bucket(sitn, parms); (t = *tp) != NULL; tp = &t->next) {
if (local == t->parms.iph.saddr && remote == t->parms.iph.daddr) if (local == t->parms.iph.saddr &&
return t; remote == t->parms.iph.daddr) {
if (create)
return NULL;
else
return t;
}
} }
if (!create) if (!create)
goto failed; goto failed;
......
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