From mboxrd@z Thu Jan 1 00:00:00 1970 From: pablo@netfilter.org Subject: [PATCH 4/4] netfilter: ipv6: only provide sk_bound_dev_if for link-local addr Date: Fri, 16 Nov 2012 13:40:53 +0100 Message-ID: <1353069653-3231-5-git-send-email-pablo@netfilter.org> References: <1353069653-3231-1-git-send-email-pablo@netfilter.org> Cc: davem@davemloft.net, netdev@vger.kernel.org To: netfilter-devel@vger.kernel.org Return-path: In-Reply-To: <1353069653-3231-1-git-send-email-pablo@netfilter.org> Sender: netdev-owner@vger.kernel.org List-Id: netfilter-devel.vger.kernel.org From: Florian Westphal yoshfuji points out that sk_bound_dev_if should only be provided for link-local addresses. IPv6 getpeer/sockname also has this test, i.e. we will now only set sin6_scope_id if the original(!) destination was a link-local address. Reported-by: YOSHIFUJI Hideaki Signed-off-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso --- net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c index 02dcafd..e5f6cf7 100644 --- a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c +++ b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c @@ -334,9 +334,14 @@ ipv6_getorigdst(struct sock *sk, int optval, void __user *user, int *len) memcpy(&sin6.sin6_addr, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u3.in6, sizeof(sin6.sin6_addr)); - sin6.sin6_scope_id = sk->sk_bound_dev_if; nf_ct_put(ct); + + if (ipv6_addr_type(&sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL) + sin6.sin6_scope_id = sk->sk_bound_dev_if; + else + sin6.sin6_scope_id = 0; + return copy_to_user(user, &sin6, sizeof(sin6)) ? -EFAULT : 0; } -- 1.7.10.4