Message ID | 1411373246-22389-2-git-send-email-steffen.klassert@secunet.com |
---|---|
State | Accepted, archived |
Delegated to: | David Miller |
Headers | show |
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index f9de5a6..69a84b4 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -364,8 +364,12 @@ static struct ip6_tnl *ip6_tnl_locate(struct net *net, (t = rtnl_dereference(*tp)) != NULL; tp = &t->next) { if (ipv6_addr_equal(local, &t->parms.laddr) && - ipv6_addr_equal(remote, &t->parms.raddr)) + ipv6_addr_equal(remote, &t->parms.raddr)) { + if (create) + return NULL; + return t; + } } if (!create) return NULL;
ip6_tnl_locate() should not return an existing tunnel if create is true. Otherwise it is possible to add the same tunnel multiple times without getting an error. So return NULL if the tunnel that should be created already exists. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> --- net/ipv6/ip6_tunnel.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)