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DECnet: Use container_of() for embedded struct

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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>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kees Cook 2017-05-08 15:31:44 -07:00 committed by David S. Miller
parent 32f1bc0f3d
commit f92ceb01c2
1 changed files with 6 additions and 6 deletions
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12
net/decnet/dn_neigh.c
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@ -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);