linux-kernel - [PATCH 2/2] Revert "l2tp: constify inet6

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Message-Id: <1501604849-19443-3-git-send-email-Julia.Lawall@lip6.fr>
Date:   Tue,  1 Aug 2017 18:27:29 +0200
From:   Julia Lawall <Julia.Lawall@...6.fr>
To:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <eric.dumazet@...il.com>,
        David Ahern <dsahern@...il.com>
Cc:     kernel-janitors@...r.kernel.org, bhumirks@...il.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] Revert "l2tp: constify inet6_protocol structures"

This reverts commit d04916a48ad4a3db892b664fa9c3a2a693c378ad.

inet6_add_protocol and inet6_del_protocol include casts that remove the
effect of the const annotation on their parameter, leading to possible
runtime crashes.

Reported-by: Eric Dumazet <eric.dumazet@...il.com>
Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

---

 net/l2tp/l2tp_ip6.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/l2tp/l2tp_ip6.c b/net/l2tp/l2tp_ip6.c
index d2efcd9..88b397c 100644
--- a/net/l2tp/l2tp_ip6.c
+++ b/net/l2tp/l2tp_ip6.c
@@ -788,7 +788,7 @@ static int l2tp_ip6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
 	.ops		= &l2tp_ip6_ops,
 };
 
-static const struct inet6_protocol l2tp_ip6_protocol = {
+static struct inet6_protocol l2tp_ip6_protocol __read_mostly = {
 	.handler	= l2tp_ip6_recv,
 };