From: Kees Cook <keescook@chromium.org>
To: "David S. Miller" <davem@davemloft.net>
Cc: linux-kernel@vger.kernel.org,
linux-decnet-user@lists.sourceforge.net, netdev@vger.kernel.org
Subject: [PATCH] DECnet: Use container_of() for embedded struct
Date: Mon, 8 May 2017 15:31:44 -0700 [thread overview]
Message-ID: <20170508223144.GA53216@beast> (raw)
Instead of a direct cross-type cast, use conatiner_of() to locate
the embedded structure, even in the face of future struct layout
randomization.
Signed-off-by: Kees Cook <keescook@chromium.org>
---
net/decnet/dn_neigh.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/net/decnet/dn_neigh.c b/net/decnet/dn_neigh.c
index 482730cd8a56..eeb5fc561f80 100644
--- a/net/decnet/dn_neigh.c
+++ b/net/decnet/dn_neigh.c
@@ -110,7 +110,7 @@ struct neigh_table dn_neigh_table = {
static int dn_neigh_construct(struct neighbour *neigh)
{
struct net_device *dev = neigh->dev;
- struct dn_neigh *dn = (struct dn_neigh *)neigh;
+ struct dn_neigh *dn = container_of(neigh, struct dn_neigh, n);
struct dn_dev *dn_db;
struct neigh_parms *parms;
@@ -339,7 +339,7 @@ int dn_to_neigh_output(struct net *net, struct sock *sk, struct sk_buff *skb)
struct dst_entry *dst = skb_dst(skb);
struct dn_route *rt = (struct dn_route *) dst;
struct neighbour *neigh = rt->n;
- struct dn_neigh *dn = (struct dn_neigh *)neigh;
+ struct dn_neigh *dn = container_of(neigh, struct dn_neigh, n);
struct dn_dev *dn_db;
bool use_long;
@@ -391,7 +391,7 @@ int dn_neigh_router_hello(struct net *net, struct sock *sk, struct sk_buff *skb)
neigh = __neigh_lookup(&dn_neigh_table, &src, skb->dev, 1);
- dn = (struct dn_neigh *)neigh;
+ dn = container_of(neigh, struct dn_neigh, n);
if (neigh) {
write_lock(&neigh->lock);
@@ -451,7 +451,7 @@ int dn_neigh_endnode_hello(struct net *net, struct sock *sk, struct sk_buff *skb
neigh = __neigh_lookup(&dn_neigh_table, &src, skb->dev, 1);
- dn = (struct dn_neigh *)neigh;
+ dn = container_of(neigh, struct dn_neigh, n);
if (neigh) {
write_lock(&neigh->lock);
@@ -510,7 +510,7 @@ static void neigh_elist_cb(struct neighbour *neigh, void *_info)
if (neigh->dev != s->dev)
return;
- dn = (struct dn_neigh *) neigh;
+ dn = container_of(neigh, struct dn_neigh, n);
if (!(dn->flags & (DN_NDFLAG_R1|DN_NDFLAG_R2)))
return;
@@ -549,7 +549,7 @@ int dn_neigh_elist(struct net_device *dev, unsigned char *ptr, int n)
static inline void dn_neigh_format_entry(struct seq_file *seq,
struct neighbour *n)
{
- struct dn_neigh *dn = (struct dn_neigh *) n;
+ struct dn_neigh *dn = container_of(n, struct dn_neigh, n);
char buf[DN_ASCBUF_LEN];
read_lock(&n->lock);
--
2.7.4
--
Kees Cook
Pixel Security
next reply other threads:[~2017-05-08 22:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-08 22:31 Kees Cook [this message]
2017-05-09 13:40 ` [PATCH] DECnet: Use container_of() for embedded struct David Miller
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