From: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Date: Tue, 5 Dec 2006 21:47:21 +0000 (-0800)
Subject: [IPV6]: Repair IPv6 Fragments
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9a217a1c7e7f36ec4996314d64267dd711dbd9bf;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[IPV6]: Repair IPv6 Fragments

The commit "[IPV6]: Use kmemdup" (commit-id:
af879cc704372ef762584e916129d19ffb39e844) broke IPv6 fragments.

Bug was spotted by Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index e05ecbb1412d..e9212c7ff5cf 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -624,13 +624,13 @@ static int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 		skb_shinfo(skb)->frag_list = NULL;
 		/* BUILD HEADER */
 
+		*prevhdr = NEXTHDR_FRAGMENT;
 		tmp_hdr = kmemdup(skb->nh.raw, hlen, GFP_ATOMIC);
 		if (!tmp_hdr) {
 			IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_FRAGFAILS);
 			return -ENOMEM;
 		}
 
-		*prevhdr = NEXTHDR_FRAGMENT;
 		__skb_pull(skb, hlen);
 		fh = (struct frag_hdr*)__skb_push(skb, sizeof(struct frag_hdr));
 		skb->nh.raw = __skb_push(skb, hlen);