zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/net/ipv6/af_inet6.c b/ap/os/linux/linux-3.4.x/net/ipv6/af_inet6.c
new file mode 100755
index 0000000..13bd762
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/net/ipv6/af_inet6.c
@@ -0,0 +1,1382 @@
+/*
+ * PF_INET6 socket protocol family
+ * Linux INET6 implementation
+ *
+ * Authors:
+ * Pedro Roque <roque@di.fc.ul.pt>
+ *
+ * Adapted from linux/net/ipv4/af_inet.c
+ *
+ * Fixes:
+ * piggy, Karl Knutson : Socket protocol table
+ * Hideaki YOSHIFUJI : sin6_scope_id support
+ * Arnaldo Melo : check proc_net_create return, cleanups
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+
+#include <linux/module.h>
+#include <linux/capability.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/kernel.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/icmpv6.h>
+#include <linux/netfilter_ipv6.h>
+
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <net/udp.h>
+#include <net/udplite.h>
+#include <net/tcp.h>
+#include <net/ipip.h>
+#include <net/protocol.h>
+#include <net/inet_common.h>
+#include <net/route.h>
+#include <net/transp_v6.h>
+#include <net/ip6_route.h>
+#include <net/addrconf.h>
+#ifdef CONFIG_IPV6_TUNNEL
+#include <net/ip6_tunnel.h>
+#endif
+
+#include <asm/uaccess.h>
+#include <linux/mroute6.h>
+
+#ifdef CONFIG_ANDROID_PARANOID_NETWORK
+#include <linux/android_aid.h>
+
+static inline int current_has_network(void)
+{
+ return in_egroup_p(AID_INET) || capable(CAP_NET_RAW);
+}
+#else
+static inline int current_has_network(void)
+{
+ return 1;
+}
+#endif
+
+MODULE_AUTHOR("Cast of dozens");
+MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
+MODULE_LICENSE("GPL");
+
+/* The inetsw6 table contains everything that inet6_create needs to
+ * build a new socket.
+ */
+static struct list_head inetsw6[SOCK_MAX];
+static DEFINE_SPINLOCK(inetsw6_lock);
+
+struct ipv6_params ipv6_defaults = {
+ .disable_ipv6 = 0,
+ .autoconf = 1,
+};
+
+static int disable_ipv6_mod = 0;
+
+module_param_named(disable, disable_ipv6_mod, int, 0444);
+MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
+
+module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
+MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
+
+module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
+MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
+
+static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
+{
+ const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
+
+ return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
+}
+
+static int inet6_create(struct net *net, struct socket *sock, int protocol,
+ int kern)
+{
+ struct inet_sock *inet;
+ struct ipv6_pinfo *np;
+ struct sock *sk;
+ struct inet_protosw *answer;
+ struct proto *answer_prot;
+ unsigned char answer_flags;
+ char answer_no_check;
+ int try_loading_module = 0;
+ int err;
+
+ if (!current_has_network())
+ return -EACCES;
+
+ if (sock->type != SOCK_RAW &&
+ sock->type != SOCK_DGRAM &&
+ !inet_ehash_secret)
+ build_ehash_secret();
+
+ /*CVE-2015-8543*/
+ if (protocol < 0 || protocol >= IPPROTO_MAX)
+ return -EINVAL;
+
+ /* Look for the requested type/protocol pair. */
+lookup_protocol:
+ err = -ESOCKTNOSUPPORT;
+ rcu_read_lock();
+ list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
+
+ err = 0;
+ /* Check the non-wild match. */
+ if (protocol == answer->protocol) {
+ if (protocol != IPPROTO_IP)
+ break;
+ } else {
+ /* Check for the two wild cases. */
+ if (IPPROTO_IP == protocol) {
+ protocol = answer->protocol;
+ break;
+ }
+ if (IPPROTO_IP == answer->protocol)
+ break;
+ }
+ err = -EPROTONOSUPPORT;
+ }
+
+ if (err) {
+ if (try_loading_module < 2) {
+ rcu_read_unlock();
+ /*
+ * Be more specific, e.g. net-pf-10-proto-132-type-1
+ * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
+ */
+ if (++try_loading_module == 1)
+ request_module("net-pf-%d-proto-%d-type-%d",
+ PF_INET6, protocol, sock->type);
+ /*
+ * Fall back to generic, e.g. net-pf-10-proto-132
+ * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
+ */
+ else
+ request_module("net-pf-%d-proto-%d",
+ PF_INET6, protocol);
+ goto lookup_protocol;
+ } else
+ goto out_rcu_unlock;
+ }
+
+ err = -EPERM;
+ if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW))
+ goto out_rcu_unlock;
+
+ sock->ops = answer->ops;
+ answer_prot = answer->prot;
+ answer_no_check = answer->no_check;
+ answer_flags = answer->flags;
+ rcu_read_unlock();
+
+ WARN_ON(answer_prot->slab == NULL);
+
+ err = -ENOBUFS;
+ sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot);
+ if (sk == NULL)
+ goto out;
+
+ sock_init_data(sock, sk);
+
+ err = 0;
+ sk->sk_no_check = answer_no_check;
+ if (INET_PROTOSW_REUSE & answer_flags)
+ sk->sk_reuse = 1;
+
+ inet = inet_sk(sk);
+ inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
+
+ if (SOCK_RAW == sock->type) {
+ inet->inet_num = protocol;
+ if (IPPROTO_RAW == protocol)
+ inet->hdrincl = 1;
+ }
+
+ sk->sk_destruct = inet_sock_destruct;
+ sk->sk_family = PF_INET6;
+ sk->sk_protocol = protocol;
+
+ sk->sk_backlog_rcv = answer->prot->backlog_rcv;
+
+ inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
+ np->hop_limit = -1;
+ np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
+ np->mc_loop = 1;
+ np->pmtudisc = IPV6_PMTUDISC_WANT;
+ np->ipv6only = net->ipv6.sysctl.bindv6only;
+
+ /* Init the ipv4 part of the socket since we can have sockets
+ * using v6 API for ipv4.
+ */
+ inet->uc_ttl = -1;
+
+ inet->mc_loop = 1;
+ inet->mc_ttl = 1;
+ inet->mc_index = 0;
+ inet->mc_list = NULL;
+ inet->rcv_tos = 0;
+
+ if (ipv4_config.no_pmtu_disc)
+ inet->pmtudisc = IP_PMTUDISC_DONT;
+ else
+ inet->pmtudisc = IP_PMTUDISC_WANT;
+ /*
+ * Increment only the relevant sk_prot->socks debug field, this changes
+ * the previous behaviour of incrementing both the equivalent to
+ * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
+ *
+ * This allows better debug granularity as we'll know exactly how many
+ * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
+ * transport protocol socks. -acme
+ */
+ sk_refcnt_debug_inc(sk);
+
+ if (inet->inet_num) {
+ /* It assumes that any protocol which allows
+ * the user to assign a number at socket
+ * creation time automatically shares.
+ */
+ inet->inet_sport = htons(inet->inet_num);
+ sk->sk_prot->hash(sk);
+ }
+ if (sk->sk_prot->init) {
+ err = sk->sk_prot->init(sk);
+ if (err) {
+ sk_common_release(sk);
+ goto out;
+ }
+ }
+out:
+ return err;
+out_rcu_unlock:
+ rcu_read_unlock();
+ goto out;
+}
+
+
+/* bind for INET6 API */
+int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
+{
+ struct sockaddr_in6 *addr=(struct sockaddr_in6 *)uaddr;
+ struct sock *sk = sock->sk;
+ struct inet_sock *inet = inet_sk(sk);
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct net *net = sock_net(sk);
+ __be32 v4addr = 0;
+ unsigned short snum;
+ int addr_type = 0;
+ int err = 0;
+
+ /* If the socket has its own bind function then use it. */
+ if (sk->sk_prot->bind)
+ return sk->sk_prot->bind(sk, uaddr, addr_len);
+
+ if (addr_len < SIN6_LEN_RFC2133)
+ return -EINVAL;
+
+ if (addr->sin6_family != AF_INET6)
+ return -EAFNOSUPPORT;
+
+ addr_type = ipv6_addr_type(&addr->sin6_addr);
+ if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
+ return -EINVAL;
+
+ snum = ntohs(addr->sin6_port);
+ if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
+ return -EACCES;
+
+ lock_sock(sk);
+
+ /* Check these errors (active socket, double bind). */
+ if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ /* Check if the address belongs to the host. */
+ if (addr_type == IPV6_ADDR_MAPPED) {
+ int chk_addr_ret;
+
+ /* Binding to v4-mapped address on a v6-only socket
+ * makes no sense
+ */
+ if (np->ipv6only) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ /* Reproduce AF_INET checks to make the bindings consistent */
+ v4addr = addr->sin6_addr.s6_addr32[3];
+ chk_addr_ret = inet_addr_type(net, v4addr);
+ if (!sysctl_ip_nonlocal_bind &&
+ !(inet->freebind || inet->transparent) &&
+ v4addr != htonl(INADDR_ANY) &&
+ chk_addr_ret != RTN_LOCAL &&
+ chk_addr_ret != RTN_MULTICAST &&
+ chk_addr_ret != RTN_BROADCAST) {
+ err = -EADDRNOTAVAIL;
+ goto out;
+ }
+ } else {
+ if (addr_type != IPV6_ADDR_ANY) {
+ struct net_device *dev = NULL;
+
+ rcu_read_lock();
+ if (addr_type & IPV6_ADDR_LINKLOCAL) {
+ if (addr_len >= sizeof(struct sockaddr_in6) &&
+ addr->sin6_scope_id) {
+ /* Override any existing binding, if another one
+ * is supplied by user.
+ */
+ sk->sk_bound_dev_if = addr->sin6_scope_id;
+ }
+
+ /* Binding to link-local address requires an interface */
+ if (!sk->sk_bound_dev_if) {
+ err = -EINVAL;
+ goto out_unlock;
+ }
+ dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
+ if (!dev) {
+ err = -ENODEV;
+ goto out_unlock;
+ }
+ }
+
+ /* ipv4 addr of the socket is invalid. Only the
+ * unspecified and mapped address have a v4 equivalent.
+ */
+ v4addr = LOOPBACK4_IPV6;
+ if (!(addr_type & IPV6_ADDR_MULTICAST)) {
+ if (!(inet->freebind || inet->transparent) &&
+ !ipv6_chk_addr(net, &addr->sin6_addr,
+ dev, 0)) {
+ err = -EADDRNOTAVAIL;
+ goto out_unlock;
+ }
+ }
+ rcu_read_unlock();
+ }
+ }
+
+ inet->inet_rcv_saddr = v4addr;
+ inet->inet_saddr = v4addr;
+
+ np->rcv_saddr = addr->sin6_addr;
+
+ if (!(addr_type & IPV6_ADDR_MULTICAST))
+ np->saddr = addr->sin6_addr;
+
+ /* Make sure we are allowed to bind here. */
+ if (sk->sk_prot->get_port(sk, snum)) {
+ inet_reset_saddr(sk);
+ err = -EADDRINUSE;
+ goto out;
+ }
+
+ if (addr_type != IPV6_ADDR_ANY) {
+ sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
+ if (addr_type != IPV6_ADDR_MAPPED)
+ np->ipv6only = 1;
+ }
+ if (snum)
+ sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
+ inet->inet_sport = htons(inet->inet_num);
+ inet->inet_dport = 0;
+ inet->inet_daddr = 0;
+out:
+ release_sock(sk);
+ return err;
+out_unlock:
+ rcu_read_unlock();
+ goto out;
+}
+
+EXPORT_SYMBOL(inet6_bind);
+
+int inet6_release(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+
+ if (sk == NULL)
+ return -EINVAL;
+
+ /* Free mc lists */
+ ipv6_sock_mc_close(sk);
+
+ /* Free ac lists */
+ ipv6_sock_ac_close(sk);
+
+ return inet_release(sock);
+}
+
+EXPORT_SYMBOL(inet6_release);
+
+void inet6_destroy_sock(struct sock *sk)
+{
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct sk_buff *skb;
+ struct ipv6_txoptions *opt;
+
+ /* Release rx options */
+
+ if ((skb = xchg(&np->pktoptions, NULL)) != NULL)
+ kfree_skb(skb);
+
+ if ((skb = xchg(&np->rxpmtu, NULL)) != NULL)
+ kfree_skb(skb);
+
+ /* Free flowlabels */
+ fl6_free_socklist(sk);
+
+ /* Free tx options */
+/*//CVE-2016-3841
+ if ((opt = xchg(&np->opt, NULL)) != NULL)
+ sock_kfree_s(sk, opt, opt->tot_len);*/
+ opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL);
+ if (opt) {
+ atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
+ txopt_put(opt);
+ }
+//CVE-2016-3841
+}
+
+EXPORT_SYMBOL_GPL(inet6_destroy_sock);
+
+/*
+ * This does both peername and sockname.
+ */
+
+int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
+ int *uaddr_len, int peer)
+{
+ struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr;
+ struct sock *sk = sock->sk;
+ struct inet_sock *inet = inet_sk(sk);
+ struct ipv6_pinfo *np = inet6_sk(sk);
+
+ sin->sin6_family = AF_INET6;
+ sin->sin6_flowinfo = 0;
+ sin->sin6_scope_id = 0;
+ if (peer) {
+ if (!inet->inet_dport)
+ return -ENOTCONN;
+ if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
+ peer == 1)
+ return -ENOTCONN;
+ sin->sin6_port = inet->inet_dport;
+ sin->sin6_addr = np->daddr;
+ if (np->sndflow)
+ sin->sin6_flowinfo = np->flow_label;
+ } else {
+ if (ipv6_addr_any(&np->rcv_saddr))
+ sin->sin6_addr = np->saddr;
+ else
+ sin->sin6_addr = np->rcv_saddr;
+
+ sin->sin6_port = inet->inet_sport;
+ }
+ if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL)
+ sin->sin6_scope_id = sk->sk_bound_dev_if;
+ *uaddr_len = sizeof(*sin);
+ return 0;
+}
+
+EXPORT_SYMBOL(inet6_getname);
+
+int inet6_killaddr_ioctl(struct net *net, void __user *arg) {
+ struct in6_ifreq ireq;
+ struct sockaddr_in6 sin6;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EACCES;
+
+ if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
+ return -EFAULT;
+
+ sin6.sin6_family = AF_INET6;
+ sin6.sin6_addr = ireq.ifr6_addr;
+ return tcp_nuke_addr(net, (struct sockaddr *) &sin6);
+}
+
+int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ struct sock *sk = sock->sk;
+ struct net *net = sock_net(sk);
+
+ switch(cmd)
+ {
+ case SIOCGSTAMP:
+ return sock_get_timestamp(sk, (struct timeval __user *)arg);
+
+ case SIOCGSTAMPNS:
+ return sock_get_timestampns(sk, (struct timespec __user *)arg);
+
+ case SIOCADDRT:
+ case SIOCDELRT:
+
+ return ipv6_route_ioctl(net, cmd, (void __user *)arg);
+
+ case SIOCSIFADDR:
+ return addrconf_add_ifaddr(net, (void __user *) arg);
+ case SIOCDIFADDR:
+ return addrconf_del_ifaddr(net, (void __user *) arg);
+ case SIOCSIFDSTADDR:
+ return addrconf_set_dstaddr(net, (void __user *) arg);
+ case SIOCKILLADDR:
+ return inet6_killaddr_ioctl(net, (void __user *) arg);
+ default:
+ if (!sk->sk_prot->ioctl)
+ return -ENOIOCTLCMD;
+ return sk->sk_prot->ioctl(sk, cmd, arg);
+ }
+ /*NOTREACHED*/
+ return 0;
+}
+
+EXPORT_SYMBOL(inet6_ioctl);
+
+const struct proto_ops inet6_stream_ops = {
+ .family = PF_INET6,
+ .owner = THIS_MODULE,
+ .release = inet6_release,
+ .bind = inet6_bind,
+ .connect = inet_stream_connect, /* ok */
+ .socketpair = sock_no_socketpair, /* a do nothing */
+ .accept = inet_accept, /* ok */
+ .getname = inet6_getname,
+ .poll = tcp_poll, /* ok */
+ .ioctl = inet6_ioctl, /* must change */
+ .listen = inet_listen, /* ok */
+ .shutdown = inet_shutdown, /* ok */
+ .setsockopt = sock_common_setsockopt, /* ok */
+ .getsockopt = sock_common_getsockopt, /* ok */
+ .sendmsg = inet_sendmsg, /* ok */
+ .recvmsg = inet_recvmsg, /* ok */
+ .mmap = sock_no_mmap,
+ .sendpage = inet_sendpage,
+ .splice_read = tcp_splice_read,
+#ifdef CONFIG_COMPAT
+ .compat_setsockopt = compat_sock_common_setsockopt,
+ .compat_getsockopt = compat_sock_common_getsockopt,
+#endif
+};
+
+const struct proto_ops inet6_dgram_ops = {
+ .family = PF_INET6,
+ .owner = THIS_MODULE,
+ .release = inet6_release,
+ .bind = inet6_bind,
+ .connect = inet_dgram_connect, /* ok */
+ .socketpair = sock_no_socketpair, /* a do nothing */
+ .accept = sock_no_accept, /* a do nothing */
+ .getname = inet6_getname,
+ .poll = udp_poll, /* ok */
+ .ioctl = inet6_ioctl, /* must change */
+ .listen = sock_no_listen, /* ok */
+ .shutdown = inet_shutdown, /* ok */
+ .setsockopt = sock_common_setsockopt, /* ok */
+ .getsockopt = sock_common_getsockopt, /* ok */
+ .sendmsg = inet_sendmsg, /* ok */
+ .recvmsg = inet_recvmsg, /* ok */
+ .mmap = sock_no_mmap,
+ .sendpage = sock_no_sendpage,
+#ifdef CONFIG_COMPAT
+ .compat_setsockopt = compat_sock_common_setsockopt,
+ .compat_getsockopt = compat_sock_common_getsockopt,
+#endif
+};
+
+static const struct net_proto_family inet6_family_ops = {
+ .family = PF_INET6,
+ .create = inet6_create,
+ .owner = THIS_MODULE,
+};
+
+int inet6_register_protosw(struct inet_protosw *p)
+{
+ struct list_head *lh;
+ struct inet_protosw *answer;
+ struct list_head *last_perm;
+ int protocol = p->protocol;
+ int ret;
+
+ spin_lock_bh(&inetsw6_lock);
+
+ ret = -EINVAL;
+ if (p->type >= SOCK_MAX)
+ goto out_illegal;
+
+ /* If we are trying to override a permanent protocol, bail. */
+ answer = NULL;
+ ret = -EPERM;
+ last_perm = &inetsw6[p->type];
+ list_for_each(lh, &inetsw6[p->type]) {
+ answer = list_entry(lh, struct inet_protosw, list);
+
+ /* Check only the non-wild match. */
+ if (INET_PROTOSW_PERMANENT & answer->flags) {
+ if (protocol == answer->protocol)
+ break;
+ last_perm = lh;
+ }
+
+ answer = NULL;
+ }
+ if (answer)
+ goto out_permanent;
+
+ /* Add the new entry after the last permanent entry if any, so that
+ * the new entry does not override a permanent entry when matched with
+ * a wild-card protocol. But it is allowed to override any existing
+ * non-permanent entry. This means that when we remove this entry, the
+ * system automatically returns to the old behavior.
+ */
+ list_add_rcu(&p->list, last_perm);
+ ret = 0;
+out:
+ spin_unlock_bh(&inetsw6_lock);
+ return ret;
+
+out_permanent:
+ printk(KERN_ERR "Attempt to override permanent protocol %d.\n",
+ protocol);
+ goto out;
+
+out_illegal:
+ printk(KERN_ERR
+ "Ignoring attempt to register invalid socket type %d.\n",
+ p->type);
+ goto out;
+}
+
+EXPORT_SYMBOL(inet6_register_protosw);
+
+void
+inet6_unregister_protosw(struct inet_protosw *p)
+{
+ if (INET_PROTOSW_PERMANENT & p->flags) {
+ printk(KERN_ERR
+ "Attempt to unregister permanent protocol %d.\n",
+ p->protocol);
+ } else {
+ spin_lock_bh(&inetsw6_lock);
+ list_del_rcu(&p->list);
+ spin_unlock_bh(&inetsw6_lock);
+
+ synchronize_net();
+ }
+}
+
+EXPORT_SYMBOL(inet6_unregister_protosw);
+
+int inet6_sk_rebuild_header(struct sock *sk)
+{
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct dst_entry *dst;
+
+ dst = __sk_dst_check(sk, np->dst_cookie);
+
+ if (dst == NULL) {
+ struct inet_sock *inet = inet_sk(sk);
+ struct in6_addr *final_p, final;
+ struct flowi6 fl6;
+
+ memset(&fl6, 0, sizeof(fl6));
+ fl6.flowi6_proto = sk->sk_protocol;
+ fl6.daddr = np->daddr;
+ fl6.saddr = np->saddr;
+ fl6.flowlabel = np->flow_label;
+ fl6.flowi6_oif = sk->sk_bound_dev_if;
+ fl6.flowi6_mark = sk->sk_mark;
+ fl6.fl6_dport = inet->inet_dport;
+ fl6.fl6_sport = inet->inet_sport;
+ security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
+
+ //CVE-2016-3841final_p = fl6_update_dst(&fl6, np->opt, &final);
+ rcu_read_lock();
+ final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt),
+ &final);
+ rcu_read_unlock();
+ //CVE-2016-3841
+ dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false);
+ if (IS_ERR(dst)) {
+ sk->sk_route_caps = 0;
+ sk->sk_err_soft = -PTR_ERR(dst);
+ return PTR_ERR(dst);
+ }
+
+ __ip6_dst_store(sk, dst, NULL, NULL);
+ }
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
+
+int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb)
+{
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct inet6_skb_parm *opt = IP6CB(skb);
+
+ if (np->rxopt.all) {
+ if ((opt->hop && (np->rxopt.bits.hopopts ||
+ np->rxopt.bits.ohopopts)) ||
+ ((IPV6_FLOWINFO_MASK &
+ *(__be32 *)skb_network_header(skb)) &&
+ np->rxopt.bits.rxflow) ||
+ (opt->srcrt && (np->rxopt.bits.srcrt ||
+ np->rxopt.bits.osrcrt)) ||
+ ((opt->dst1 || opt->dst0) &&
+ (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
+ return 1;
+ }
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
+
+static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto)
+{
+ const struct inet6_protocol *ops = NULL;
+
+ for (;;) {
+ struct ipv6_opt_hdr *opth;
+ int len;
+
+ if (proto != NEXTHDR_HOP) {
+ ops = rcu_dereference(inet6_protos[proto]);
+
+ if (unlikely(!ops))
+ break;
+
+ if (!(ops->flags & INET6_PROTO_GSO_EXTHDR))
+ break;
+ }
+
+ if (unlikely(!pskb_may_pull(skb, 8)))
+ break;
+
+ opth = (void *)skb->data;
+ len = ipv6_optlen(opth);
+
+ if (unlikely(!pskb_may_pull(skb, len)))
+ break;
+
+ proto = opth->nexthdr;
+ __skb_pull(skb, len);
+ }
+
+ return proto;
+}
+
+static int ipv6_gso_send_check(struct sk_buff *skb)
+{
+ const struct ipv6hdr *ipv6h;
+ const struct inet6_protocol *ops;
+ int err = -EINVAL;
+
+ if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
+ goto out;
+
+ ipv6h = ipv6_hdr(skb);
+ __skb_pull(skb, sizeof(*ipv6h));
+ err = -EPROTONOSUPPORT;
+
+ rcu_read_lock();
+ ops = rcu_dereference(inet6_protos[
+ ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr)]);
+
+ if (likely(ops && ops->gso_send_check)) {
+ skb_reset_transport_header(skb);
+ err = ops->gso_send_check(skb);
+ }
+ rcu_read_unlock();
+
+out:
+ return err;
+}
+
+static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
+ netdev_features_t features)
+{
+ struct sk_buff *segs = ERR_PTR(-EINVAL);
+ struct ipv6hdr *ipv6h;
+ const struct inet6_protocol *ops;
+ int proto;
+ struct frag_hdr *fptr;
+ unsigned int unfrag_ip6hlen;
+ u8 *prevhdr;
+ int offset = 0;
+
+ if (!(features & NETIF_F_V6_CSUM))
+ features &= ~NETIF_F_SG;
+
+ if (unlikely(skb_shinfo(skb)->gso_type &
+ ~(SKB_GSO_UDP |
+ SKB_GSO_DODGY |
+ SKB_GSO_TCP_ECN |
+ SKB_GSO_TCPV6 |
+ 0)))
+ goto out;
+
+ if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
+ goto out;
+
+ ipv6h = ipv6_hdr(skb);
+ __skb_pull(skb, sizeof(*ipv6h));
+ segs = ERR_PTR(-EPROTONOSUPPORT);
+
+ proto = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
+ rcu_read_lock();
+ ops = rcu_dereference(inet6_protos[proto]);
+ if (likely(ops && ops->gso_segment)) {
+ skb_reset_transport_header(skb);
+ segs = ops->gso_segment(skb, features);
+ }
+ rcu_read_unlock();
+
+ if (IS_ERR(segs))
+ goto out;
+
+ for (skb = segs; skb; skb = skb->next) {
+ ipv6h = ipv6_hdr(skb);
+ ipv6h->payload_len = htons(skb->len - skb->mac_len -
+ sizeof(*ipv6h));
+ if (proto == IPPROTO_UDP) {
+ unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr);
+ if (unfrag_ip6hlen < 0)//CVE-2017-9074
+ return ERR_PTR(unfrag_ip6hlen);
+ fptr = (struct frag_hdr *)(skb_network_header(skb) +
+ unfrag_ip6hlen);
+ fptr->frag_off = htons(offset);
+ if (skb->next != NULL)
+ fptr->frag_off |= htons(IP6_MF);
+ offset += (ntohs(ipv6h->payload_len) -
+ sizeof(struct frag_hdr));
+ }
+ }
+
+out:
+ return segs;
+}
+
+struct ipv6_gro_cb {
+ struct napi_gro_cb napi;
+ int proto;
+};
+
+#define IPV6_GRO_CB(skb) ((struct ipv6_gro_cb *)(skb)->cb)
+
+static struct sk_buff **ipv6_gro_receive(struct sk_buff **head,
+ struct sk_buff *skb)
+{
+ const struct inet6_protocol *ops;
+ struct sk_buff **pp = NULL;
+ struct sk_buff *p;
+ struct ipv6hdr *iph;
+ unsigned int nlen;
+ unsigned int hlen;
+ unsigned int off;
+ int flush = 1;
+ int proto;
+ __wsum csum;
+
+ off = skb_gro_offset(skb);
+ hlen = off + sizeof(*iph);
+ iph = skb_gro_header_fast(skb, off);
+ if (skb_gro_header_hard(skb, hlen)) {
+ iph = skb_gro_header_slow(skb, hlen, off);
+ if (unlikely(!iph))
+ goto out;
+ }
+
+ skb_gro_pull(skb, sizeof(*iph));
+ skb_set_transport_header(skb, skb_gro_offset(skb));
+
+ flush += ntohs(iph->payload_len) != skb_gro_len(skb);
+
+ rcu_read_lock();
+ proto = iph->nexthdr;
+ ops = rcu_dereference(inet6_protos[proto]);
+ if (!ops || !ops->gro_receive) {
+ __pskb_pull(skb, skb_gro_offset(skb));
+ proto = ipv6_gso_pull_exthdrs(skb, proto);
+ skb_gro_pull(skb, -skb_transport_offset(skb));
+ skb_reset_transport_header(skb);
+ __skb_push(skb, skb_gro_offset(skb));
+
+ ops = rcu_dereference(inet6_protos[proto]);
+ if (!ops || !ops->gro_receive)
+ goto out_unlock;
+
+ iph = ipv6_hdr(skb);
+ }
+
+ IPV6_GRO_CB(skb)->proto = proto;
+
+ flush--;
+ nlen = skb_network_header_len(skb);
+
+ for (p = *head; p; p = p->next) {
+ struct ipv6hdr *iph2;
+
+ if (!NAPI_GRO_CB(p)->same_flow)
+ continue;
+
+ iph2 = ipv6_hdr(p);
+
+ /* All fields must match except length. */
+ if (nlen != skb_network_header_len(p) ||
+ memcmp(iph, iph2, offsetof(struct ipv6hdr, payload_len)) ||
+ memcmp(&iph->nexthdr, &iph2->nexthdr,
+ nlen - offsetof(struct ipv6hdr, nexthdr))) {
+ NAPI_GRO_CB(p)->same_flow = 0;
+ continue;
+ }
+
+ NAPI_GRO_CB(p)->flush |= flush;
+ }
+
+ NAPI_GRO_CB(skb)->flush |= flush;
+
+ csum = skb->csum;
+ skb_postpull_rcsum(skb, iph, skb_network_header_len(skb));
+
+ //pp = ops->gro_receive(head, skb);CVE-2016-7039
+ pp = call_gro_receive(ops->gro_receive, head, skb);
+
+ skb->csum = csum;
+
+out_unlock:
+ rcu_read_unlock();
+
+out:
+ NAPI_GRO_CB(skb)->flush |= flush;
+
+ return pp;
+}
+
+static int ipv6_gro_complete(struct sk_buff *skb)
+{
+ const struct inet6_protocol *ops;
+ struct ipv6hdr *iph = ipv6_hdr(skb);
+ int err = -ENOSYS;
+
+ iph->payload_len = htons(skb->len - skb_network_offset(skb) -
+ sizeof(*iph));
+
+ rcu_read_lock();
+ ops = rcu_dereference(inet6_protos[IPV6_GRO_CB(skb)->proto]);
+ if (WARN_ON(!ops || !ops->gro_complete))
+ goto out_unlock;
+
+ err = ops->gro_complete(skb);
+
+out_unlock:
+ rcu_read_unlock();
+
+ return err;
+}
+//CVE-2016-8666
+static struct sk_buff **sit_gro_receive(struct sk_buff **head,
+ struct sk_buff *skb)
+{
+ if (NAPI_GRO_CB(skb)->encap_mark) {
+ NAPI_GRO_CB(skb)->flush = 1;
+ return NULL;
+ }
+
+ NAPI_GRO_CB(skb)->encap_mark = 1;
+
+ return ipv6_gro_receive(head, skb);
+}
+
+static struct packet_type ipv6_packet_type __read_mostly = {
+ .type = cpu_to_be16(ETH_P_IPV6),
+ .func = ipv6_rcv,
+ .gso_send_check = ipv6_gso_send_check,
+ .gso_segment = ipv6_gso_segment,
+ //.gro_receive = ipv6_gro_receive,//CVE-2016-8666
+ .gro_receive = sit_gro_receive,
+ .gro_complete = ipv6_gro_complete,
+};
+
+static int __init ipv6_packet_init(void)
+{
+ dev_add_pack(&ipv6_packet_type);
+ return 0;
+}
+
+static void ipv6_packet_cleanup(void)
+{
+ dev_remove_pack(&ipv6_packet_type);
+}
+
+static int __net_init ipv6_init_mibs(struct net *net)
+{
+ if (snmp_mib_init((void __percpu **)net->mib.udp_stats_in6,
+ sizeof(struct udp_mib),
+ __alignof__(struct udp_mib)) < 0)
+ return -ENOMEM;
+ if (snmp_mib_init((void __percpu **)net->mib.udplite_stats_in6,
+ sizeof(struct udp_mib),
+ __alignof__(struct udp_mib)) < 0)
+ goto err_udplite_mib;
+ if (snmp_mib_init((void __percpu **)net->mib.ipv6_statistics,
+ sizeof(struct ipstats_mib),
+ __alignof__(struct ipstats_mib)) < 0)
+ goto err_ip_mib;
+ if (snmp_mib_init((void __percpu **)net->mib.icmpv6_statistics,
+ sizeof(struct icmpv6_mib),
+ __alignof__(struct icmpv6_mib)) < 0)
+ goto err_icmp_mib;
+ net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
+ GFP_KERNEL);
+ if (!net->mib.icmpv6msg_statistics)
+ goto err_icmpmsg_mib;
+ return 0;
+
+err_icmpmsg_mib:
+ snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics);
+err_icmp_mib:
+ snmp_mib_free((void __percpu **)net->mib.ipv6_statistics);
+err_ip_mib:
+ snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6);
+err_udplite_mib:
+ snmp_mib_free((void __percpu **)net->mib.udp_stats_in6);
+ return -ENOMEM;
+}
+
+static void ipv6_cleanup_mibs(struct net *net)
+{
+ snmp_mib_free((void __percpu **)net->mib.udp_stats_in6);
+ snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6);
+ snmp_mib_free((void __percpu **)net->mib.ipv6_statistics);
+ snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics);
+ kfree(net->mib.icmpv6msg_statistics);
+}
+
+static int __net_init inet6_net_init(struct net *net)
+{
+ int err = 0;
+
+ net->ipv6.sysctl.bindv6only = 0;
+ net->ipv6.sysctl.icmpv6_time = 1*HZ;
+
+ err = ipv6_init_mibs(net);
+ if (err)
+ return err;
+#ifdef CONFIG_PROC_FS
+ err = udp6_proc_init(net);
+ if (err)
+ goto out;
+ err = tcp6_proc_init(net);
+ if (err)
+ goto proc_tcp6_fail;
+ err = ac6_proc_init(net);
+ if (err)
+ goto proc_ac6_fail;
+#endif
+ return err;
+
+#ifdef CONFIG_PROC_FS
+proc_ac6_fail:
+ tcp6_proc_exit(net);
+proc_tcp6_fail:
+ udp6_proc_exit(net);
+out:
+ ipv6_cleanup_mibs(net);
+ return err;
+#endif
+}
+
+static void __net_exit inet6_net_exit(struct net *net)
+{
+#ifdef CONFIG_PROC_FS
+ udp6_proc_exit(net);
+ tcp6_proc_exit(net);
+ ac6_proc_exit(net);
+#endif
+ ipv6_cleanup_mibs(net);
+}
+
+static struct pernet_operations inet6_net_ops = {
+ .init = inet6_net_init,
+ .exit = inet6_net_exit,
+};
+
+static int __init inet6_init(void)
+{
+ struct sk_buff *dummy_skb;
+ struct list_head *r;
+ 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_mod) {
+ 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;
+
+ err = proto_register(&udpv6_prot, 1);
+ if (err)
+ goto out_unregister_tcp_proto;
+
+ err = proto_register(&udplitev6_prot, 1);
+ if (err)
+ goto out_unregister_udp_proto;
+
+ err = proto_register(&rawv6_prot, 1);
+ if (err)
+ goto out_unregister_udplite_proto;
+
+
+ /* We MUST register RAW sockets before we create the ICMP6,
+ * IGMP6, or NDISC control sockets.
+ */
+ err = rawv6_init();
+ if (err)
+ goto out_unregister_raw_proto;
+
+ /* Register the family here so that the init calls below will
+ * be able to create sockets. (?? is this dangerous ??)
+ */
+ err = sock_register(&inet6_family_ops);
+ if (err)
+ goto out_sock_register_fail;
+
+#ifdef CONFIG_SYSCTL
+ err = ipv6_static_sysctl_register();
+ if (err)
+ goto static_sysctl_fail;
+#endif
+ tcpv6_prot.sysctl_mem = init_net.ipv4.sysctl_tcp_mem;
+
+ /*
+ * ipngwg API draft makes clear that the correct semantics
+ * for TCP and UDP is to consider one TCP and UDP instance
+ * in a host available by both INET and INET6 APIs and
+ * able to communicate via both network protocols.
+ */
+
+ err = register_pernet_subsys(&inet6_net_ops);
+ if (err)
+ goto register_pernet_fail;
+ err = icmpv6_init();
+ if (err)
+ goto icmp_fail;
+ err = ip6_mr_init();
+ if (err)
+ goto ipmr_fail;
+ err = ndisc_init();
+ if (err)
+ goto ndisc_fail;
+ err = igmp6_init();
+ if (err)
+ goto igmp_fail;
+ err = ipv6_netfilter_init();
+ if (err)
+ goto netfilter_fail;
+ /* Create /proc/foo6 entries. */
+#ifdef CONFIG_PROC_FS
+ err = -ENOMEM;
+ if (raw6_proc_init())
+ goto proc_raw6_fail;
+ if (udplite6_proc_init())
+ goto proc_udplite6_fail;
+ if (ipv6_misc_proc_init())
+ goto proc_misc6_fail;
+ if (if6_proc_init())
+ goto proc_if6_fail;
+#endif
+ err = ip6_route_init();
+ if (err)
+ goto ip6_route_fail;
+ err = ip6_flowlabel_init();
+ if (err)
+ goto ip6_flowlabel_fail;
+ err = addrconf_init();
+ if (err)
+ goto addrconf_fail;
+
+ /* Init v6 extension headers. */
+ err = ipv6_exthdrs_init();
+ if (err)
+ goto ipv6_exthdrs_fail;
+
+ err = ipv6_frag_init();
+ if (err)
+ goto ipv6_frag_fail;
+
+ /* Init v6 transport protocols. */
+ err = udpv6_init();
+ if (err)
+ goto udpv6_fail;
+
+ err = udplitev6_init();
+ if (err)
+ goto udplitev6_fail;
+
+ err = tcpv6_init();
+ if (err)
+ goto tcpv6_fail;
+
+ err = ipv6_packet_init();
+ if (err)
+ goto ipv6_packet_fail;
+
+#ifdef CONFIG_SYSCTL
+ err = ipv6_sysctl_register();
+ if (err)
+ goto sysctl_fail;
+#endif
+out:
+ return err;
+
+#ifdef CONFIG_SYSCTL
+sysctl_fail:
+ ipv6_packet_cleanup();
+#endif
+ipv6_packet_fail:
+ tcpv6_exit();
+tcpv6_fail:
+ udplitev6_exit();
+udplitev6_fail:
+ udpv6_exit();
+udpv6_fail:
+ ipv6_frag_exit();
+ipv6_frag_fail:
+ ipv6_exthdrs_exit();
+ipv6_exthdrs_fail:
+ addrconf_cleanup();
+addrconf_fail:
+ ip6_flowlabel_cleanup();
+ip6_flowlabel_fail:
+ ip6_route_cleanup();
+ip6_route_fail:
+#ifdef CONFIG_PROC_FS
+ if6_proc_exit();
+proc_if6_fail:
+ ipv6_misc_proc_exit();
+proc_misc6_fail:
+ udplite6_proc_exit();
+proc_udplite6_fail:
+ raw6_proc_exit();
+proc_raw6_fail:
+#endif
+ ipv6_netfilter_fini();
+netfilter_fail:
+ igmp6_cleanup();
+igmp_fail:
+ ndisc_cleanup();
+ndisc_fail:
+ ip6_mr_cleanup();
+ipmr_fail:
+ icmpv6_cleanup();
+icmp_fail:
+ unregister_pernet_subsys(&inet6_net_ops);
+register_pernet_fail:
+#ifdef CONFIG_SYSCTL
+ ipv6_static_sysctl_unregister();
+static_sysctl_fail:
+#endif
+ sock_unregister(PF_INET6);
+ rtnl_unregister_all(PF_INET6);
+out_sock_register_fail:
+ rawv6_exit();
+out_unregister_raw_proto:
+ proto_unregister(&rawv6_prot);
+out_unregister_udplite_proto:
+ proto_unregister(&udplitev6_prot);
+out_unregister_udp_proto:
+ proto_unregister(&udpv6_prot);
+out_unregister_tcp_proto:
+ proto_unregister(&tcpv6_prot);
+ goto out;
+}
+module_init(inet6_init);
+
+static void __exit inet6_exit(void)
+{
+ if (disable_ipv6_mod)
+ return;
+
+ /* First of all disallow new sockets creation. */
+ sock_unregister(PF_INET6);
+ /* Disallow any further netlink messages */
+ rtnl_unregister_all(PF_INET6);
+
+#ifdef CONFIG_SYSCTL
+ ipv6_sysctl_unregister();
+#endif
+ udpv6_exit();
+ udplitev6_exit();
+ tcpv6_exit();
+
+ /* Cleanup code parts. */
+ ipv6_packet_cleanup();
+ ipv6_frag_exit();
+ ipv6_exthdrs_exit();
+ addrconf_cleanup();
+ ip6_flowlabel_cleanup();
+ ip6_route_cleanup();
+#ifdef CONFIG_PROC_FS
+
+ /* Cleanup code parts. */
+ if6_proc_exit();
+ ipv6_misc_proc_exit();
+ udplite6_proc_exit();
+ raw6_proc_exit();
+#endif
+ ipv6_netfilter_fini();
+ igmp6_cleanup();
+ ndisc_cleanup();
+ ip6_mr_cleanup();
+ icmpv6_cleanup();
+ rawv6_exit();
+
+ unregister_pernet_subsys(&inet6_net_ops);
+#ifdef CONFIG_SYSCTL
+ ipv6_static_sysctl_unregister();
+#endif
+ proto_unregister(&rawv6_prot);
+ proto_unregister(&udplitev6_prot);
+ proto_unregister(&udpv6_prot);
+ proto_unregister(&tcpv6_prot);
+
+ rcu_barrier(); /* Wait for completion of call_rcu()'s */
+}
+module_exit(inet6_exit);
+
+MODULE_ALIAS_NETPROTO(PF_INET6);