From 284b507667569b65c6b4ff71aa58521e465f5610 Mon Sep 17 00:00:00 2001
From: Zhang Wei <zhangwei519@huawei.com>
Date: Sat, 22 Apr 2017 19:20:36 +0800
Subject: [PATCH] net: diag: make udp_diag_destroy work for mapped addresses.
udp_diag_destroy does look up the IPv4 UDP hashtable for mapped
addresses, but it gets the IPv4 address to look up from the
beginning of the IPv6 address instead of the end.
[backport of net-next f95bf346226b9b79352e05508beececc807cc37a]
Change-Id: I86665b3f4e17c29afd496571d30cec7d14672009
Tested: https://android-review.googlesource.com/269874
Fixes: 5d77dca82839 ("net: diag: support SOCK_DESTROY for UDP sockets")
Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Acked-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/ipv4/udp_diag.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/ipv4/udp_diag.c b/net/ipv4/udp_diag.c
index f4eb259f6318..b8caa2824880 100644
--- a/net/ipv4/udp_diag.c
+++ b/net/ipv4/udp_diag.c
@@ -182,8 +182,8 @@ static int __udp_diag_destroy(struct sk_buff *in_skb,
if (ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_dst) &&
ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_src))
sk = __udp4_lib_lookup(net,
- req->id.idiag_dst[0], req->id.idiag_dport,
- req->id.idiag_src[0], req->id.idiag_sport,
+ req->id.idiag_dst[3], req->id.idiag_dport,
+ req->id.idiag_src[3], req->id.idiag_sport,
req->id.idiag_if, tbl);
else
--
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