From 6c06a478c9e59d1584a5dc1b2b3519bae5d6546a Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Tue, 27 Jan 2009 22:30:19 -0800 Subject: net: fix xfrm reverse flow lookup for icmp6 This patch fixes the xfrm reverse flow lookup for icmp6 so that icmp6 packets don't get lost over ipsec tunnels. Similar patch is in RHEL5 kernel for a quite long time and I do not see why it isn't in mainline. Signed-off-by: Jiri Pirko Acked-by: Herbert Xu Signed-off-by: David S. Miller --- net/ipv6/icmp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'net/ipv6') diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c index 4f43384..36dff88 100644 --- a/net/ipv6/icmp.c +++ b/net/ipv6/icmp.c @@ -443,10 +443,10 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info, if (xfrm_decode_session_reverse(skb, &fl2, AF_INET6)) goto relookup_failed; - if (ip6_dst_lookup(sk, &dst2, &fl)) + if (ip6_dst_lookup(sk, &dst2, &fl2)) goto relookup_failed; - err = xfrm_lookup(net, &dst2, &fl, sk, XFRM_LOOKUP_ICMP); + err = xfrm_lookup(net, &dst2, &fl2, sk, XFRM_LOOKUP_ICMP); switch (err) { case 0: dst_release(dst); -- cgit v1.1 From 1d6e55f195128813f96458203a9fa14204f9251e Mon Sep 17 00:00:00 2001 From: Thomas Goff Date: Tue, 27 Jan 2009 22:39:59 -0800 Subject: IPv6: Fix multicast routing bugs. This patch addresses the IPv6 multicast routing issues described below. It was tested with XORP 1.4/1.5 as the IPv6 PIM-SM routing daemon against FreeBSD peers. net/ipv6/ip6_input.c: - Don't try to forward link-local multicast packets. - Don't reset skb2->dev before calling ip6_mr_input() so packets can be identified as coming from the PIM register vif properly. net/ipv6/ip6mr.c: - Fix incoming PIM register messages processing: * The IPv6 pseudo-header should be included when checksumming PIM messages (RFC 4601 section 4.9; RFC 3973 section 4.7.1). * Packets decapsulated from PIM register messages should have skb->protocol ETH_P_IPV6. - Enable/disable IPv6 multicast forwarding on the corresponding interface when a routing daemon adds/removes a multicast virtual interface. - Remove incorrect skb_pull() to fix userspace signaling. - Enable/disable global IPv6 multicast forwarding when an IPv6 multicast routing socket is opened/closed. net/ipv6/route.c: - Don't use strict routing logic for packets decapsulated from PIM register messages (similar to disabling rp_filter for the IPv4 case). Signed-off-by: Thomas Goff Reviewed-by: Fred Templin Signed-off-by: David S. Miller --- net/ipv6/ip6_input.c | 2 +- net/ipv6/ip6mr.c | 23 ++++++++++++++++++----- net/ipv6/route.c | 2 +- 3 files changed, 20 insertions(+), 7 deletions(-) (limited to 'net/ipv6') diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c index 936f489..f171e8d 100644 --- a/net/ipv6/ip6_input.c +++ b/net/ipv6/ip6_input.c @@ -255,6 +255,7 @@ int ip6_mc_input(struct sk_buff *skb) * IPv6 multicast router mode is now supported ;) */ if (dev_net(skb->dev)->ipv6.devconf_all->mc_forwarding && + !(ipv6_addr_type(&hdr->daddr) & IPV6_ADDR_LINKLOCAL) && likely(!(IP6CB(skb)->flags & IP6SKB_FORWARDED))) { /* * Okay, we try to forward - split and duplicate @@ -316,7 +317,6 @@ int ip6_mc_input(struct sk_buff *skb) } if (skb2) { - skb2->dev = skb2->dst->dev; ip6_mr_input(skb2); } } diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c index 3c51b2d..d19a84b 100644 --- a/net/ipv6/ip6mr.c +++ b/net/ipv6/ip6mr.c @@ -365,7 +365,9 @@ static int pim6_rcv(struct sk_buff *skb) pim = (struct pimreghdr *)skb_transport_header(skb); if (pim->type != ((PIM_VERSION << 4) | PIM_REGISTER) || (pim->flags & PIM_NULL_REGISTER) || - (ip_compute_csum((void *)pim, sizeof(*pim)) != 0 && + (csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, + sizeof(*pim), IPPROTO_PIM, + csum_partial((void *)pim, sizeof(*pim), 0)) && csum_fold(skb_checksum(skb, 0, skb->len, 0)))) goto drop; @@ -392,7 +394,7 @@ static int pim6_rcv(struct sk_buff *skb) skb_pull(skb, (u8 *)encap - skb->data); skb_reset_network_header(skb); skb->dev = reg_dev; - skb->protocol = htons(ETH_P_IP); + skb->protocol = htons(ETH_P_IPV6); skb->ip_summed = 0; skb->pkt_type = PACKET_HOST; dst_release(skb->dst); @@ -481,6 +483,7 @@ static int mif6_delete(struct net *net, int vifi) { struct mif_device *v; struct net_device *dev; + struct inet6_dev *in6_dev; if (vifi < 0 || vifi >= net->ipv6.maxvif) return -EADDRNOTAVAIL; @@ -513,6 +516,10 @@ static int mif6_delete(struct net *net, int vifi) dev_set_allmulti(dev, -1); + in6_dev = __in6_dev_get(dev); + if (in6_dev) + in6_dev->cnf.mc_forwarding--; + if (v->flags & MIFF_REGISTER) unregister_netdevice(dev); @@ -622,6 +629,7 @@ static int mif6_add(struct net *net, struct mif6ctl *vifc, int mrtsock) int vifi = vifc->mif6c_mifi; struct mif_device *v = &net->ipv6.vif6_table[vifi]; struct net_device *dev; + struct inet6_dev *in6_dev; int err; /* Is vif busy ? */ @@ -662,6 +670,10 @@ static int mif6_add(struct net *net, struct mif6ctl *vifc, int mrtsock) return -EINVAL; } + in6_dev = __in6_dev_get(dev); + if (in6_dev) + in6_dev->cnf.mc_forwarding++; + /* * Fill in the VIF structures */ @@ -838,8 +850,6 @@ static int ip6mr_cache_report(struct net *net, struct sk_buff *pkt, mifi_t mifi, skb->dst = dst_clone(pkt->dst); skb->ip_summed = CHECKSUM_UNNECESSARY; - - skb_pull(skb, sizeof(struct ipv6hdr)); } if (net->ipv6.mroute6_sk == NULL) { @@ -1222,8 +1232,10 @@ static int ip6mr_sk_init(struct sock *sk) rtnl_lock(); write_lock_bh(&mrt_lock); - if (likely(net->ipv6.mroute6_sk == NULL)) + if (likely(net->ipv6.mroute6_sk == NULL)) { net->ipv6.mroute6_sk = sk; + net->ipv6.devconf_all->mc_forwarding++; + } else err = -EADDRINUSE; write_unlock_bh(&mrt_lock); @@ -1242,6 +1254,7 @@ int ip6mr_sk_done(struct sock *sk) if (sk == net->ipv6.mroute6_sk) { write_lock_bh(&mrt_lock); net->ipv6.mroute6_sk = NULL; + net->ipv6.devconf_all->mc_forwarding--; write_unlock_bh(&mrt_lock); mroute_clean_tables(net); diff --git a/net/ipv6/route.c b/net/ipv6/route.c index c4a5982..9c57423 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -794,7 +794,7 @@ void ip6_route_input(struct sk_buff *skb) .proto = iph->nexthdr, }; - if (rt6_need_strict(&iph->daddr)) + if (rt6_need_strict(&iph->daddr) && skb->dev->type != ARPHRD_PIMREG) flags |= RT6_LOOKUP_F_IFACE; skb->dst = fib6_rule_lookup(net, &fl, flags, ip6_pol_route_input); -- cgit v1.1 From a4e6db07984529847c6ad8bc616485e721dcb809 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Tue, 27 Jan 2009 22:41:03 -0800 Subject: ipv6: Make mc_forwarding sysctl read-only. The kernel manages this value internally, as necessary, as VIFs are added/removed and as multicast routers are registered and deregistered. Signed-off-by: David S. Miller --- net/ipv6/addrconf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/ipv6') diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index e92ad84..f9afb45 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -4250,7 +4250,7 @@ static struct addrconf_sysctl_table .procname = "mc_forwarding", .data = &ipv6_devconf.mc_forwarding, .maxlen = sizeof(int), - .mode = 0644, + .mode = 0444, .proc_handler = proc_dointvec, }, #endif -- cgit v1.1 From 5d6e430d3bafe743b18dc443189093bf532e91ed Mon Sep 17 00:00:00 2001 From: Dave Jones Date: Sat, 31 Jan 2009 00:51:49 -0800 Subject: ipv6: compile fix for ip6mr.c net/ipv6/ip6mr.c: In function 'pim6_rcv': net/ipv6/ip6mr.c:368: error: implicit declaration of function 'csum_ipv6_magic' Signed-off-by: Dave Jones Signed-off-by: David S. Miller --- net/ipv6/ip6mr.c | 1 + 1 file changed, 1 insertion(+) (limited to 'net/ipv6') diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c index d19a84b..228be55 100644 --- a/net/ipv6/ip6mr.c +++ b/net/ipv6/ip6mr.c @@ -48,6 +48,7 @@ #include #include #include +#include /* Big lock, protecting vif table, mrt cache and mroute socket state. Note that the changes are semaphored via rtnl_lock. -- cgit v1.1 From 0178b695fd6b40a62a215cbeb03dd51ada3bb5e0 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Thu, 5 Feb 2009 15:15:50 -0800 Subject: ipv6: Copy cork options in ip6_append_data As the options passed to ip6_append_data may be ephemeral, we need to duplicate it for corking. This patch applies the simplest fix which is to memdup all the relevant bits. Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- net/ipv6/ip6_output.c | 67 +++++++++++++++++++++++++++++++++++++++------------ 1 file changed, 52 insertions(+), 15 deletions(-) (limited to 'net/ipv6') diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index 4b15938..9fb49c3 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -1105,6 +1105,18 @@ static inline int ip6_ufo_append_data(struct sock *sk, return err; } +static inline struct ipv6_opt_hdr *ip6_opt_dup(struct ipv6_opt_hdr *src, + gfp_t gfp) +{ + return src ? kmemdup(src, (src->hdrlen + 1) * 8, gfp) : NULL; +} + +static inline struct ipv6_rt_hdr *ip6_rthdr_dup(struct ipv6_rt_hdr *src, + gfp_t gfp) +{ + return src ? kmemdup(src, (src->hdrlen + 1) * 8, gfp) : NULL; +} + int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb), void *from, int length, int transhdrlen, @@ -1130,17 +1142,37 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to, * setup for corking */ if (opt) { - if (np->cork.opt == NULL) { - np->cork.opt = kmalloc(opt->tot_len, - sk->sk_allocation); - if (unlikely(np->cork.opt == NULL)) - return -ENOBUFS; - } else if (np->cork.opt->tot_len < opt->tot_len) { - printk(KERN_DEBUG "ip6_append_data: invalid option length\n"); + if (WARN_ON(np->cork.opt)) return -EINVAL; - } - memcpy(np->cork.opt, opt, opt->tot_len); - inet->cork.flags |= IPCORK_OPT; + + np->cork.opt = kmalloc(opt->tot_len, sk->sk_allocation); + if (unlikely(np->cork.opt == NULL)) + return -ENOBUFS; + + np->cork.opt->tot_len = opt->tot_len; + np->cork.opt->opt_flen = opt->opt_flen; + np->cork.opt->opt_nflen = opt->opt_nflen; + + np->cork.opt->dst0opt = ip6_opt_dup(opt->dst0opt, + sk->sk_allocation); + if (opt->dst0opt && !np->cork.opt->dst0opt) + return -ENOBUFS; + + np->cork.opt->dst1opt = ip6_opt_dup(opt->dst1opt, + sk->sk_allocation); + if (opt->dst1opt && !np->cork.opt->dst1opt) + return -ENOBUFS; + + np->cork.opt->hopopt = ip6_opt_dup(opt->hopopt, + sk->sk_allocation); + if (opt->hopopt && !np->cork.opt->hopopt) + return -ENOBUFS; + + np->cork.opt->srcrt = ip6_rthdr_dup(opt->srcrt, + sk->sk_allocation); + if (opt->srcrt && !np->cork.opt->srcrt) + return -ENOBUFS; + /* need source address above miyazawa*/ } dst_hold(&rt->u.dst); @@ -1167,8 +1199,7 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to, } else { rt = (struct rt6_info *)inet->cork.dst; fl = &inet->cork.fl; - if (inet->cork.flags & IPCORK_OPT) - opt = np->cork.opt; + opt = np->cork.opt; transhdrlen = 0; exthdrlen = 0; mtu = inet->cork.fragsize; @@ -1407,9 +1438,15 @@ error: static void ip6_cork_release(struct inet_sock *inet, struct ipv6_pinfo *np) { - inet->cork.flags &= ~IPCORK_OPT; - kfree(np->cork.opt); - np->cork.opt = NULL; + if (np->cork.opt) { + kfree(np->cork.opt->dst0opt); + kfree(np->cork.opt->dst1opt); + kfree(np->cork.opt->hopopt); + kfree(np->cork.opt->srcrt); + kfree(np->cork.opt); + np->cork.opt = NULL; + } + if (inet->cork.dst) { dst_release(inet->cork.dst); inet->cork.dst = NULL; -- cgit v1.1 From 684de409acff8b1fe8bf188d75ff2f99c624387d Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Fri, 6 Feb 2009 00:49:55 -0800 Subject: ipv6: Disallow rediculious flowlabel option sizes. Just like PKTINFO, limit the options area to 64K. Based upon report by Eric Sesterhenn and analysis by Roland Dreier. Signed-off-by: David S. Miller --- net/ipv6/ip6_flowlabel.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'net/ipv6') diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c index c62dd24..7712578 100644 --- a/net/ipv6/ip6_flowlabel.c +++ b/net/ipv6/ip6_flowlabel.c @@ -323,17 +323,21 @@ static struct ip6_flowlabel * fl_create(struct net *net, struct in6_flowlabel_req *freq, char __user *optval, int optlen, int *err_p) { - struct ip6_flowlabel *fl; + struct ip6_flowlabel *fl = NULL; int olen; int addr_type; int err; + olen = optlen - CMSG_ALIGN(sizeof(*freq)); + err = -EINVAL; + if (olen > 64 * 1024) + goto done; + err = -ENOMEM; fl = kzalloc(sizeof(*fl), GFP_KERNEL); if (fl == NULL) goto done; - olen = optlen - CMSG_ALIGN(sizeof(*freq)); if (olen > 0) { struct msghdr msg; struct flowi flowi; -- cgit v1.1 From a51f42f3c940e5582c40454ece066d033bc7e24f Mon Sep 17 00:00:00 2001 From: Eric Leblond Date: Mon, 9 Feb 2009 14:33:03 -0800 Subject: netfilter: fix tuple inversion for Node information request The patch fixes a typo in the inverse mapping of Node Information request. Following draft-ietf-ipngwg-icmp-name-lookups-09, "Querier" sends a type 139 (ICMPV6_NI_QUERY) packet to "Responder" which answer with a type 140 (ICMPV6_NI_REPLY) packet. Signed-off-by: Eric Leblond Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'net/ipv6') diff --git a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c index c455cf4..114a92e 100644 --- a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c +++ b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c @@ -49,8 +49,8 @@ static bool icmpv6_pkt_to_tuple(const struct sk_buff *skb, static const u_int8_t invmap[] = { [ICMPV6_ECHO_REQUEST - 128] = ICMPV6_ECHO_REPLY + 1, [ICMPV6_ECHO_REPLY - 128] = ICMPV6_ECHO_REQUEST + 1, - [ICMPV6_NI_QUERY - 128] = ICMPV6_NI_QUERY + 1, - [ICMPV6_NI_REPLY - 128] = ICMPV6_NI_REPLY +1 + [ICMPV6_NI_QUERY - 128] = ICMPV6_NI_REPLY + 1, + [ICMPV6_NI_REPLY - 128] = ICMPV6_NI_QUERY +1 }; static bool icmpv6_invert_tuple(struct nf_conntrack_tuple *tuple, -- cgit v1.1 From 3f9007135c1dc896db9a9e35920aafc65b157230 Mon Sep 17 00:00:00 2001 From: Eric Leblond Date: Mon, 9 Feb 2009 14:33:20 -0800 Subject: netfilter: nf_conntrack_ipv6: don't track ICMPv6 negotiation message This patch removes connection tracking handling for ICMPv6 messages related to Stateless Address Autoconfiguration, MLD, and MLDv2. They can not be tracked because they are massively using multicast (on pre-defined address). But they are not invalid and should not be detected as such. Signed-off-by: Eric Leblond Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'net/ipv6') diff --git a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c index 114a92e..c323643 100644 --- a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c +++ b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c @@ -53,6 +53,17 @@ static const u_int8_t invmap[] = { [ICMPV6_NI_REPLY - 128] = ICMPV6_NI_QUERY +1 }; +static const u_int8_t noct_valid_new[] = { + [ICMPV6_MGM_QUERY - 130] = 1, + [ICMPV6_MGM_REPORT -130] = 1, + [ICMPV6_MGM_REDUCTION - 130] = 1, + [NDISC_ROUTER_SOLICITATION - 130] = 1, + [NDISC_ROUTER_ADVERTISEMENT - 130] = 1, + [NDISC_NEIGHBOUR_SOLICITATION - 130] = 1, + [NDISC_NEIGHBOUR_ADVERTISEMENT - 130] = 1, + [ICMPV6_MLD2_REPORT - 130] = 1 +}; + static bool icmpv6_invert_tuple(struct nf_conntrack_tuple *tuple, const struct nf_conntrack_tuple *orig) { @@ -178,6 +189,7 @@ icmpv6_error(struct net *net, struct sk_buff *skb, unsigned int dataoff, { const struct icmp6hdr *icmp6h; struct icmp6hdr _ih; + int type; icmp6h = skb_header_pointer(skb, dataoff, sizeof(_ih), &_ih); if (icmp6h == NULL) { @@ -194,6 +206,15 @@ icmpv6_error(struct net *net, struct sk_buff *skb, unsigned int dataoff, return -NF_ACCEPT; } + type = icmp6h->icmp6_type - 130; + if (type >= 0 && type < sizeof(noct_valid_new) && + noct_valid_new[type]) { + skb->nfct = &nf_conntrack_untracked.ct_general; + skb->nfctinfo = IP_CT_NEW; + nf_conntrack_get(skb->nfct); + return NF_ACCEPT; + } + /* is not error message ? */ if (icmp6h->icmp6_type >= 128) return NF_ACCEPT; -- cgit v1.1 From 20461c1740cac5e02733221c9f653098a703f55a Mon Sep 17 00:00:00 2001 From: Noriaki TAKAMIYA Date: Mon, 9 Feb 2009 15:01:19 -0800 Subject: IPv6: fix to set device name when new IPv6 over IPv6 tunnel device is created. When the user creates IPv6 over IPv6 tunnel, the device name created by the kernel isn't set to t->parm.name, which is referred as the result of ioctl(). Signed-off-by: Noriaki TAKAMIYA Signed-off-by: David S. Miller --- net/ipv6/ip6_tunnel.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/ipv6') diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index 58e2b0d..d994c55 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -249,8 +249,8 @@ static struct ip6_tnl *ip6_tnl_create(struct net *net, struct ip6_tnl_parm *p) } t = netdev_priv(dev); - ip6_tnl_dev_init(dev); t->parms = *p; + ip6_tnl_dev_init(dev); if ((err = register_netdevice(dev)) < 0) goto failed_free; -- cgit v1.1 From 4aa3b2ee1945ed082430ae1fb988d60eef64ca07 Mon Sep 17 00:00:00 2001 From: Eric Leblond Date: Wed, 18 Feb 2009 15:28:46 +0100 Subject: netfilter: nf_conntrack_ipv6: fix nf_log_packet message in icmpv6 conntrack This patch fixes a trivial typo that was adding a new line at end of the nf_log_packet() prefix. It also make the logging conditionnal by adding a LOG_INVALID test. Signed-off-by: Eric Leblond Signed-off-by: Patrick McHardy --- net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'net/ipv6') diff --git a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c index c323643..72dbb6d 100644 --- a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c +++ b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c @@ -201,8 +201,9 @@ icmpv6_error(struct net *net, struct sk_buff *skb, unsigned int dataoff, if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING && nf_ip6_checksum(skb, hooknum, dataoff, IPPROTO_ICMPV6)) { - nf_log_packet(PF_INET6, 0, skb, NULL, NULL, NULL, - "nf_ct_icmpv6: ICMPv6 checksum failed\n"); + if (LOG_INVALID(net, IPPROTO_ICMPV6)) + nf_log_packet(PF_INET6, 0, skb, NULL, NULL, NULL, + "nf_ct_icmpv6: ICMPv6 checksum failed "); return -NF_ACCEPT; } -- cgit v1.1 From 3f53a38131a4e7a053c0aa060aba0411242fb6b9 Mon Sep 17 00:00:00 2001 From: Pavel Emelyanov Date: Thu, 26 Feb 2009 03:35:13 -0800 Subject: ipv6: don't use tw net when accounting for recycled tw We already have a valid net in that place, but this is not just a cleanup - the tw pointer can be NULL there sometimes, thus causing an oops in NET_NS=y case. The same place in ipv4 code already works correctly using existing net, rather than tw's one. The bug exists since 2.6.27. Signed-off-by: Pavel Emelyanov Signed-off-by: David S. Miller --- net/ipv6/inet6_hashtables.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'net/ipv6') diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c index 8fe267f..1bcc343 100644 --- a/net/ipv6/inet6_hashtables.c +++ b/net/ipv6/inet6_hashtables.c @@ -258,11 +258,11 @@ unique: if (twp != NULL) { *twp = tw; - NET_INC_STATS_BH(twsk_net(tw), LINUX_MIB_TIMEWAITRECYCLED); + NET_INC_STATS_BH(net, LINUX_MIB_TIMEWAITRECYCLED); } else if (tw != NULL) { /* Silly. Should hash-dance instead... */ inet_twsk_deschedule(tw, death_row); - NET_INC_STATS_BH(twsk_net(tw), LINUX_MIB_TIMEWAITRECYCLED); + NET_INC_STATS_BH(net, LINUX_MIB_TIMEWAITRECYCLED); inet_twsk_put(tw); } -- cgit v1.1 From b325fddb7f869e6c95a88dc6573220f162e5b89f Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Thu, 26 Feb 2009 06:55:31 +0000 Subject: ipv6: Fix sysctl unregistration deadlock Signed-off-by: David S. Miller --- net/ipv6/addrconf.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) (limited to 'net/ipv6') diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index f9afb45..40fabde 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -493,15 +493,17 @@ static void addrconf_forward_change(struct net *net, __s32 newf) read_unlock(&dev_base_lock); } -static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old) +static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old) { struct net *net; net = (struct net *)table->extra2; if (p == &net->ipv6.devconf_dflt->forwarding) - return; + return 0; + + if (!rtnl_trylock()) + return -ERESTARTSYS; - rtnl_lock(); if (p == &net->ipv6.devconf_all->forwarding) { __s32 newf = net->ipv6.devconf_all->forwarding; net->ipv6.devconf_dflt->forwarding = newf; @@ -512,6 +514,7 @@ static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old) if (*p) rt6_purge_dflt_routers(net); + return 1; } #endif @@ -3983,7 +3986,7 @@ int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); if (write) - addrconf_fixup_forwarding(ctl, valp, val); + ret = addrconf_fixup_forwarding(ctl, valp, val); return ret; } @@ -4019,8 +4022,7 @@ static int addrconf_sysctl_forward_strategy(ctl_table *table, } *valp = new; - addrconf_fixup_forwarding(table, valp, val); - return 1; + return addrconf_fixup_forwarding(table, valp, val); } static struct addrconf_sysctl_table -- cgit v1.1 From 176c39af29bc4edaf37f663553eeaacd47b5bc9c Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Tue, 3 Mar 2009 01:06:45 -0800 Subject: netns: fix addrconf_ifdown kernel panic When a network namespace is destroyed the network interfaces are all unregistered, making addrconf_ifdown called by the netdevice notifier. In the other hand, the addrconf exit method does a loop on the network devices and does addrconf_ifdown on each of them. But the ordering of the netns subsystem is not right because it uses the register_pernet_device instead of register_pernet_subsys. If we handle the loopback as any network device, we can safely use register_pernet_subsys. But if we use register_pernet_subsys, the addrconf exit method will do exactly what was already done with the unregistering of the network devices. So in definitive, this code is pointless. I removed the netns addrconf exit method and moved the code to the addrconf cleanup function. Signed-off-by: Daniel Lezcano Signed-off-by: David S. Miller --- net/ipv6/addrconf.c | 39 +++++++++------------------------------ 1 file changed, 9 insertions(+), 30 deletions(-) (limited to 'net/ipv6') diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 40fabde..1220e2c 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -2611,9 +2611,6 @@ static int addrconf_ifdown(struct net_device *dev, int how) ASSERT_RTNL(); - if ((dev->flags & IFF_LOOPBACK) && how == 1) - how = 0; - rt6_ifdown(net, dev); neigh_ifdown(&nd_tbl, dev); @@ -4448,25 +4445,6 @@ int unregister_inet6addr_notifier(struct notifier_block *nb) EXPORT_SYMBOL(unregister_inet6addr_notifier); -static void addrconf_net_exit(struct net *net) -{ - struct net_device *dev; - - rtnl_lock(); - /* clean dev list */ - for_each_netdev(net, dev) { - if (__in6_dev_get(dev) == NULL) - continue; - addrconf_ifdown(dev, 1); - } - addrconf_ifdown(net->loopback_dev, 2); - rtnl_unlock(); -} - -static struct pernet_operations addrconf_net_ops = { - .exit = addrconf_net_exit, -}; - /* * Init / cleanup code */ @@ -4508,10 +4486,6 @@ int __init addrconf_init(void) if (err) goto errlo; - err = register_pernet_device(&addrconf_net_ops); - if (err) - return err; - register_netdevice_notifier(&ipv6_dev_notf); addrconf_verify(0); @@ -4541,15 +4515,22 @@ errlo: void addrconf_cleanup(void) { struct inet6_ifaddr *ifa; + struct net_device *dev; int i; unregister_netdevice_notifier(&ipv6_dev_notf); - unregister_pernet_device(&addrconf_net_ops); - unregister_pernet_subsys(&addrconf_ops); rtnl_lock(); + /* clean dev list */ + for_each_netdev(&init_net, dev) { + if (__in6_dev_get(dev) == NULL) + continue; + addrconf_ifdown(dev, 1); + } + addrconf_ifdown(init_net.loopback_dev, 2); + /* * Check hash table. */ @@ -4570,6 +4551,4 @@ void addrconf_cleanup(void) del_timer(&addr_chk_timer); rtnl_unlock(); - - unregister_pernet_subsys(&addrconf_net_ops); } -- cgit v1.1 From fe7ca2e1e847b65c12d245cbf402af89da96888a Mon Sep 17 00:00:00 2001 From: Brian Haley Date: Wed, 4 Mar 2009 03:18:11 -0800 Subject: IPv6: add "disable" module parameter support to ipv6.ko Add "disable" module parameter support to ipv6.ko by specifying "disable=1" on module load. We just do the minimum of initializing inetsw6[] so calls from other modules to inet6_register_protosw() won't OOPs, then bail out. No IPv6 addresses or sockets can be created as a result, and a reboot is required to enable IPv6. Signed-off-by: Brian Haley Signed-off-by: David S. Miller --- net/ipv6/af_inet6.c | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) (limited to 'net/ipv6') diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index c802bc1..da944ec 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -72,6 +72,10 @@ MODULE_LICENSE("GPL"); static struct list_head inetsw6[SOCK_MAX]; static DEFINE_SPINLOCK(inetsw6_lock); +static int disable_ipv6 = 0; +module_param_named(disable, disable_ipv6, int, 0); +MODULE_PARM_DESC(disable, "Disable IPv6 such that it is non-functional"); + static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk) { const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo); @@ -991,10 +995,21 @@ static int __init inet6_init(void) { struct sk_buff *dummy_skb; struct list_head *r; - int err; + int err = 0; BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb)); + /* Register the socket-side information for inet6_create. */ + for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) + INIT_LIST_HEAD(r); + + if (disable_ipv6) { + printk(KERN_INFO + "IPv6: Loaded, but administratively disabled, " + "reboot required to enable\n"); + goto out; + } + err = proto_register(&tcpv6_prot, 1); if (err) goto out; @@ -1012,10 +1027,6 @@ static int __init inet6_init(void) goto out_unregister_udplite_proto; - /* Register the socket-side information for inet6_create. */ - for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) - INIT_LIST_HEAD(r); - /* We MUST register RAW sockets before we create the ICMP6, * IGMP6, or NDISC control sockets. */ -- cgit v1.1 From ff8cf9a93800e8118ea097c1aba7203d59a0f3f1 Mon Sep 17 00:00:00 2001 From: John Dykstra Date: Wed, 11 Mar 2009 09:22:51 -0700 Subject: ipv6: Fix BUG when disabled ipv6 module is unloaded Do not try to "uninitialize" ipv6 if its initialization had been skipped because module parameter disable=1 had been specified. Reported-by: Thomas Backlund Signed-off-by: John Dykstra Acked-by: Brian Haley Signed-off-by: David S. Miller --- net/ipv6/af_inet6.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'net/ipv6') diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index da944ec..9c8309e 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -1192,6 +1192,9 @@ module_init(inet6_init); static void __exit inet6_exit(void) { + if (disable_ipv6) + return; + /* First of all disallow new sockets creation. */ sock_unregister(PF_INET6); /* Disallow any further netlink messages */ -- cgit v1.1 From d1238d5337e8e53cddea77c2a26d26b6eb5a982f Mon Sep 17 00:00:00 2001 From: Christoph Paasch Date: Mon, 16 Mar 2009 15:52:11 +0100 Subject: netfilter: conntrack: check for NEXTHDR_NONE before header sanity checking NEXTHDR_NONE doesn't has an IPv6 option header, so the first check for the length will always fail and results in a confusing message "too short" if debugging enabled. With this patch, we check for NEXTHDR_NONE before length sanity checkings are done. Signed-off-by: Christoph Paasch Signed-off-by: Pablo Neira Ayuso Signed-off-by: Patrick McHardy --- net/ipv6/netfilter/nf_conntrack_reasm.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'net/ipv6') diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c index ed4d79a..058a5e4 100644 --- a/net/ipv6/netfilter/nf_conntrack_reasm.c +++ b/net/ipv6/netfilter/nf_conntrack_reasm.c @@ -528,14 +528,14 @@ find_prev_fhdr(struct sk_buff *skb, u8 *prevhdrp, int *prevhoff, int *fhoff) if (!ipv6_ext_hdr(nexthdr)) { return -1; } - if (len < (int)sizeof(struct ipv6_opt_hdr)) { - pr_debug("too short\n"); - return -1; - } if (nexthdr == NEXTHDR_NONE) { pr_debug("next header is none\n"); return -1; } + if (len < (int)sizeof(struct ipv6_opt_hdr)) { + pr_debug("too short\n"); + return -1; + } if (skb_copy_bits(skb, start, &hdr, sizeof(hdr))) BUG(); if (nexthdr == NEXTHDR_AUTH) -- cgit v1.1 From 1b1d8f73a44fe1796a73a97ebcb08cad18b97f07 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B8rn=20Mork?= Date: Wed, 18 Mar 2009 18:56:54 -0700 Subject: ipv6: fix display of local and remote sit endpoints MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This fixes the regressions cause by commit 1326c3d5a4b792a2b15877feb7fb691f8945d203 (v2.6.28-rc6-461-g23a12b1) broke the display of local and remote addresses of an SIT tunnel in iproute2. nt->parms is used by ipip6_tunnel_init() and therefore need to be initialized first. Tracked as http://bugzilla.kernel.org/show_bug.cgi?id=12868 Reported-by: Jan Engelhardt Signed-off-by: Bjørn Mork Signed-off-by: David S. Miller --- net/ipv6/sit.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/ipv6') diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c index d3467e5..5cee2bc 100644 --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -188,9 +188,9 @@ static struct ip_tunnel * ipip6_tunnel_locate(struct net *net, } nt = netdev_priv(dev); - ipip6_tunnel_init(dev); nt->parms = *parms; + ipip6_tunnel_init(dev); if (parms->i_flags & SIT_ISATAP) dev->priv_flags |= IFF_ISATAP; -- cgit v1.1 From 2bad35b7c9588eb5e65c03bcae54e7eb6b1a6504 Mon Sep 17 00:00:00 2001 From: "Jorge Boncompte [DTI2]" Date: Wed, 18 Mar 2009 23:26:11 -0700 Subject: netns: oops in ip[6]_frag_reasm incrementing stats dev can be NULL in ip[6]_frag_reasm for skb's coming from RAW sockets. Quagga's OSPFD sends fragmented packets on a RAW socket, when netfilter conntrack reassembles them on the OUTPUT path you hit this code path. You can test it with something like "hping2 -0 -d 2000 -f AA.BB.CC.DD" With help from Jarek Poplawski. Signed-off-by: Jorge Boncompte [DTI2] Signed-off-by: David S. Miller --- net/ipv6/reassembly.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'net/ipv6') diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c index 3c57511..e9ac7a1 100644 --- a/net/ipv6/reassembly.c +++ b/net/ipv6/reassembly.c @@ -452,6 +452,7 @@ err: static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev, struct net_device *dev) { + struct net *net = container_of(fq->q.net, struct net, ipv6.frags); struct sk_buff *fp, *head = fq->q.fragments; int payload_len; unsigned int nhoff; @@ -551,8 +552,7 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev, head->csum); rcu_read_lock(); - IP6_INC_STATS_BH(dev_net(dev), - __in6_dev_get(dev), IPSTATS_MIB_REASMOKS); + IP6_INC_STATS_BH(net, __in6_dev_get(dev), IPSTATS_MIB_REASMOKS); rcu_read_unlock(); fq->q.fragments = NULL; return 1; @@ -566,8 +566,7 @@ out_oom: printk(KERN_DEBUG "ip6_frag_reasm: no memory for reassembly\n"); out_fail: rcu_read_lock(); - IP6_INC_STATS_BH(dev_net(dev), - __in6_dev_get(dev), IPSTATS_MIB_REASMFAILS); + IP6_INC_STATS_BH(net, __in6_dev_get(dev), IPSTATS_MIB_REASMFAILS); rcu_read_unlock(); return -1; } -- cgit v1.1