ipv6: add complete rcu protection around np->opt

[pandora-kernel.git] / net / ipv6 / udp.c

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 888892e..3308803 100644 (file)
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -954,6 +954,7 @@ int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk,
        struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name;
        struct in6_addr *daddr, *final_p, final;
        struct ipv6_txoptions *opt = NULL;
+       struct ipv6_txoptions *opt_to_free = NULL;
        struct ip6_flowlabel *flowlabel = NULL;
        struct flowi6 fl6;
        struct dst_entry *dst;
@@ -1107,8 +1108,10 @@ do_udp_sendmsg:
                        opt = NULL;
                connected = 0;
        }
-       if (opt == NULL)
-               opt = np->opt;
+       if (!opt) {
+               opt = txopt_get(np);
+               opt_to_free = opt;
+       }
        if (flowlabel)
                opt = fl6_merge_options(&opt_space, flowlabel, opt);
        opt = ipv6_fixup_options(&opt_space, opt);
@@ -1208,6 +1211,7 @@ do_append_data:
 out:
        dst_release(dst);
        fl6_sock_release(flowlabel);
+       txopt_put(opt_to_free);
        if (!err)
                return len;
        /*