diff options
Diffstat (limited to 'net/core/neighbour.c')
| -rw-r--r-- | net/core/neighbour.c | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/net/core/neighbour.c b/net/core/neighbour.c index b4b478353b27..ba509a4a8e92 100644 --- a/net/core/neighbour.c +++ b/net/core/neighbour.c @@ -1266,10 +1266,9 @@ void pneigh_enqueue(struct neigh_table *tbl, struct neigh_parms *p, struct neigh_parms *neigh_parms_alloc(struct net_device *dev, struct neigh_table *tbl) { - struct neigh_parms *p = kmalloc(sizeof(*p), GFP_KERNEL); + struct neigh_parms *p = kmemdup(&tbl->parms, sizeof(*p), GFP_KERNEL); if (p) { - memcpy(p, &tbl->parms, sizeof(*p)); p->tbl = tbl; atomic_set(&p->refcnt, 1); INIT_RCU_HEAD(&p->rcu_head); @@ -2410,20 +2409,27 @@ static struct file_operations neigh_stat_seq_fops = { #endif /* CONFIG_PROC_FS */ #ifdef CONFIG_ARPD +static inline size_t neigh_nlmsg_size(void) +{ + return NLMSG_ALIGN(sizeof(struct ndmsg)) + + nla_total_size(MAX_ADDR_LEN) /* NDA_DST */ + + nla_total_size(MAX_ADDR_LEN) /* NDA_LLADDR */ + + nla_total_size(sizeof(struct nda_cacheinfo)) + + nla_total_size(4); /* NDA_PROBES */ +} + static void __neigh_notify(struct neighbour *n, int type, int flags) { struct sk_buff *skb; int err = -ENOBUFS; - skb = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); + skb = nlmsg_new(neigh_nlmsg_size(), GFP_ATOMIC); if (skb == NULL) goto errout; err = neigh_fill_info(skb, n, 0, 0, type, flags); - if (err < 0) { - kfree_skb(skb); - goto errout; - } + /* failure implies BUG in neigh_nlmsg_size() */ + BUG_ON(err < 0); err = rtnl_notify(skb, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); errout: @@ -2618,14 +2624,14 @@ int neigh_sysctl_register(struct net_device *dev, struct neigh_parms *p, int p_id, int pdev_id, char *p_name, proc_handler *handler, ctl_handler *strategy) { - struct neigh_sysctl_table *t = kmalloc(sizeof(*t), GFP_KERNEL); + struct neigh_sysctl_table *t = kmemdup(&neigh_sysctl_template, + sizeof(*t), GFP_KERNEL); const char *dev_name_source = NULL; char *dev_name = NULL; int err = 0; if (!t) return -ENOBUFS; - memcpy(t, &neigh_sysctl_template, sizeof(*t)); t->neigh_vars[0].data = &p->mcast_probes; t->neigh_vars[1].data = &p->ucast_probes; t->neigh_vars[2].data = &p->app_probes; |