[IPV6]: Fix sending extension headers before and including routing header.

Based on suggestion from Masahide Nakamura <nakam@linux-ipv6.org>.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index bf9519341fd3..e2b87cc68b7b 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -778,7 +778,9 @@ do_udp_sendmsg:
         }
         if (opt == NULL)
                 opt = np->opt;
-        opt = fl6_merge_options(&opt_space, flowlabel, opt);
+        if (flowlabel)
+                opt = fl6_merge_options(&opt_space, flowlabel, opt);
+        opt = ipv6_fixup_options(&opt_space, opt);
 
         fl->proto = IPPROTO_UDP;
         ipv6_addr_copy(&fl->fl6_dst, daddr);