[NETLINK]: Missing initializations in dumped data

Mostly missing initialization of padding fields of 1 or 2 bytes length,
two instances of uninitialized nlmsgerr->msg of 16 bytes length.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/neighbour.c

@@ -1598,6 +1598,8 @@ static int neightbl_fill_info(struct neigh_table *tbl, struct sk_buff *skb,
 
 	read_lock_bh(&tbl->lock);
 	ndtmsg->ndtm_family = tbl->family;
+	ndtmsg->ndtm_pad1   = 0;
+	ndtmsg->ndtm_pad2   = 0;
 
 	RTA_PUT_STRING(skb, NDTA_NAME, tbl->id);
 	RTA_PUT_MSECS(skb, NDTA_GC_INTERVAL, tbl->gc_interval);
@@ -1683,6 +1685,8 @@ static int neightbl_fill_param_info(struct neigh_table *tbl,
 
 	read_lock_bh(&tbl->lock);
 	ndtmsg->ndtm_family = tbl->family;
+	ndtmsg->ndtm_pad1   = 0;
+	ndtmsg->ndtm_pad2   = 0;
 	RTA_PUT_STRING(skb, NDTA_NAME, tbl->id);
 
 	if (neightbl_fill_parms(skb, parms) < 0)
@@ -1872,6 +1876,8 @@ static int neigh_fill_info(struct sk_buff *skb, struct neighbour *n,
 	struct ndmsg *ndm = NLMSG_DATA(nlh);
 
 	ndm->ndm_family	 = n->ops->family;
+	ndm->ndm_pad1    = 0;
+	ndm->ndm_pad2    = 0;
 	ndm->ndm_flags	 = n->flags;
 	ndm->ndm_type	 = n->type;
 	ndm->ndm_ifindex = n->dev->ifindex;

net/core/rtnetlink.c

@@ -189,6 +189,7 @@ static int rtnetlink_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
 	nlh = NLMSG_NEW(skb, pid, seq, type, sizeof(*r), flags);
 	r = NLMSG_DATA(nlh);
 	r->ifi_family = AF_UNSPEC;
+	r->__ifi_pad = 0;
 	r->ifi_type = dev->type;
 	r->ifi_index = dev->ifindex;
 	r->ifi_flags = dev_get_flags(dev);

net/core/wireless.c

@@ -1102,6 +1102,7 @@ static inline int rtnetlink_fill_iwinfo(struct sk_buff *	skb,
 	nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(*r));
 	r = NLMSG_DATA(nlh);
 	r->ifi_family = AF_UNSPEC;
+	r->__ifi_pad = 0;
 	r->ifi_type = dev->type;
 	r->ifi_index = dev->ifindex;
 	r->ifi_flags = dev->flags;

net/ipv4/ipmr.c

@@ -297,6 +297,7 @@ static int vif_delete(int vifi)
 static void ipmr_destroy_unres(struct mfc_cache *c)
 {
 	struct sk_buff *skb;
+	struct nlmsgerr *e;
 
 	atomic_dec(&cache_resolve_queue_len);
 
@@ -306,7 +307,9 @@ static void ipmr_destroy_unres(struct mfc_cache *c)
 			nlh->nlmsg_type = NLMSG_ERROR;
 			nlh->nlmsg_len = NLMSG_LENGTH(sizeof(struct nlmsgerr));
 			skb_trim(skb, nlh->nlmsg_len);
-			((struct nlmsgerr*)NLMSG_DATA(nlh))->error = -ETIMEDOUT;
+			e = NLMSG_DATA(nlh);
+			e->error = -ETIMEDOUT;
+			memset(&e->msg, 0, sizeof(e->msg));
 			netlink_unicast(rtnl, skb, NETLINK_CB(skb).dst_pid, MSG_DONTWAIT);
 		} else
 			kfree_skb(skb);
@@ -499,6 +502,7 @@ static struct mfc_cache *ipmr_cache_alloc_unres(void)
 static void ipmr_cache_resolve(struct mfc_cache *uc, struct mfc_cache *c)
 {
 	struct sk_buff *skb;
+	struct nlmsgerr *e;
 
 	/*
 	 *	Play the pending entries through our router
@@ -515,7 +519,9 @@ static void ipmr_cache_resolve(struct mfc_cache *uc, struct mfc_cache *c)
 				nlh->nlmsg_type = NLMSG_ERROR;
 				nlh->nlmsg_len = NLMSG_LENGTH(sizeof(struct nlmsgerr));
 				skb_trim(skb, nlh->nlmsg_len);
-				((struct nlmsgerr*)NLMSG_DATA(nlh))->error = -EMSGSIZE;
+				e = NLMSG_DATA(nlh);
+				e->error = -EMSGSIZE;
+				memset(&e->msg, 0, sizeof(e->msg));
 			}
 			err = netlink_unicast(rtnl, skb, NETLINK_CB(skb).dst_pid, MSG_DONTWAIT);
 		} else

net/ipv6/addrconf.c

@@ -2923,6 +2923,7 @@ static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
 	nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*r), flags);
 	r = NLMSG_DATA(nlh);
 	r->ifi_family = AF_INET6;
+	r->__ifi_pad = 0;
 	r->ifi_type = dev->type;
 	r->ifi_index = dev->ifindex;
 	r->ifi_flags = dev_get_flags(dev);

net/sched/act_api.c

@@ -439,6 +439,8 @@ tca_get_fill(struct sk_buff *skb, struct tc_action *a, u32 pid, u32 seq,
 
 	t = NLMSG_DATA(nlh);
 	t->tca_family = AF_UNSPEC;
+	t->tca__pad1 = 0;
+	t->tca__pad2 = 0;
 	
 	x = (struct rtattr*) skb->tail;
 	RTA_PUT(skb, TCA_ACT_TAB, 0, NULL);
@@ -580,6 +582,8 @@ static int tca_action_flush(struct rtattr *rta, struct nlmsghdr *n, u32 pid)
 	nlh = NLMSG_PUT(skb, pid, n->nlmsg_seq, RTM_DELACTION, sizeof(*t));
 	t = NLMSG_DATA(nlh);
 	t->tca_family = AF_UNSPEC;
+	t->tca__pad1 = 0;
+	t->tca__pad2 = 0;
 
 	x = (struct rtattr *) skb->tail;
 	RTA_PUT(skb, TCA_ACT_TAB, 0, NULL);
@@ -687,6 +691,8 @@ static int tcf_add_notify(struct tc_action *a, u32 pid, u32 seq, int event,
 	nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*t), flags);
 	t = NLMSG_DATA(nlh);
 	t->tca_family = AF_UNSPEC;
+	t->tca__pad1 = 0;
+	t->tca__pad2 = 0;
 
 	x = (struct rtattr*) skb->tail;
 	RTA_PUT(skb, TCA_ACT_TAB, 0, NULL);
@@ -842,6 +848,8 @@ tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb)
 	                cb->nlh->nlmsg_type, sizeof(*t));
 	t = NLMSG_DATA(nlh);
 	t->tca_family = AF_UNSPEC;
+	t->tca__pad1 = 0;
+	t->tca__pad2 = 0;
 
 	x = (struct rtattr *) skb->tail;
 	RTA_PUT(skb, TCA_ACT_TAB, 0, NULL);

net/sched/cls_api.c

@@ -331,6 +331,8 @@ tcf_fill_node(struct sk_buff *skb, struct tcf_proto *tp, unsigned long fh,
 	nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*tcm), flags);
 	tcm = NLMSG_DATA(nlh);
 	tcm->tcm_family = AF_UNSPEC;
+	tcm->tcm__pad1 = 0;
+	tcm->tcm__pad1 = 0;
 	tcm->tcm_ifindex = tp->q->dev->ifindex;
 	tcm->tcm_parent = tp->classid;
 	tcm->tcm_info = TC_H_MAKE(tp->prio, tp->protocol);

net/sched/sch_api.c

@@ -770,6 +770,8 @@ static int tc_fill_qdisc(struct sk_buff *skb, struct Qdisc *q, u32 clid,
 	nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*tcm), flags);
 	tcm = NLMSG_DATA(nlh);
 	tcm->tcm_family = AF_UNSPEC;
+	tcm->tcm__pad1 = 0;
+	tcm->tcm__pad2 = 0;
 	tcm->tcm_ifindex = q->dev->ifindex;
 	tcm->tcm_parent = clid;
 	tcm->tcm_handle = q->handle;

net/sched/sch_cbq.c

@@ -1563,6 +1563,8 @@ static __inline__ int cbq_dump_police(struct sk_buff *skb, struct cbq_class *cl)
 
 	if (cl->police) {
 		opt.police = cl->police;
+		opt.__res1 = 0;
+		opt.__res2 = 0;
 		RTA_PUT(skb, TCA_CBQ_POLICE, sizeof(opt), &opt);
 	}
 	return skb->len;