From: Lorenzo Colitti <lorenzo@google.com>
Date: Wed, 3 Jul 2013 15:52:49 +0000 (+0900)
Subject: net: ipv6: add missing lock in ping_v6_sendmsg
X-Git-Tag: firefly_0821_release~4090^2~398
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b918c72ce27090051ac9681bfd162abcec0abceb;p=firefly-linux-kernel-4.4.55.git

net: ipv6: add missing lock in ping_v6_sendmsg

[net-next commit a1bdc45580fc19e968b32ad27cd7e476a4aa58f6]

Bug: 12800827
Change-Id: I93d897e5043dc89bc99f111c89ef4f8b1fa1885d
Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/ping.c b/net/ipv6/ping.c
index 1f4886857b44..858788da5a2f 100644
--- a/net/ipv6/ping.c
+++ b/net/ipv6/ping.c
@@ -197,6 +197,7 @@ int ping_v6_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 	if (hlimit < 0)
 		hlimit = ip6_dst_hoplimit(dst);
 
+	lock_sock(sk);
 	err = ip6_append_data(sk, ping_getfrag, &pfh, len,
 			      0, hlimit,
 			      np->tclass, NULL, &fl6, rt,
@@ -211,6 +212,7 @@ int ping_v6_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 						 (struct icmp6hdr *) &pfh.icmph,
 						 len);
 	}
+	release_sock(sk);
 
 	if (err)
 		return err;