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Commit 9a6308d7 authored by David S. Miller's avatar David S. Miller
Browse files

neighbour: Stop using NLA_PUT*(). 



These macros contain a hidden goto, and are thus extremely error
prone and make code hard to audit.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1eb4c977

net/core/neighbour.c

+40 −35
Original line number Diff line number Diff line
@@ -1768,29 +1768,29 @@ static int neightbl_fill_parms(struct sk_buff *skb, struct neigh_parms *parms) 
	if (nest == NULL)

		return -ENOBUFS;



	if (parms->dev)

		NLA_PUT_U32(skb, NDTPA_IFINDEX, parms->dev->ifindex);



	NLA_PUT_U32(skb, NDTPA_REFCNT, atomic_read(&parms->refcnt));

	NLA_PUT_U32(skb, NDTPA_QUEUE_LENBYTES, parms->queue_len_bytes);

	if ((parms->dev &&

	     nla_put_u32(skb, NDTPA_IFINDEX, parms->dev->ifindex)) ||

	    nla_put_u32(skb, NDTPA_REFCNT, atomic_read(&parms->refcnt)) ||

	    nla_put_u32(skb, NDTPA_QUEUE_LENBYTES, parms->queue_len_bytes) ||

	    /* approximative value for deprecated QUEUE_LEN (in packets) */

	NLA_PUT_U32(skb, NDTPA_QUEUE_LEN,

	    nla_put_u32(skb, NDTPA_QUEUE_LEN,

			DIV_ROUND_UP(parms->queue_len_bytes,

				 SKB_TRUESIZE(ETH_FRAME_LEN)));

	NLA_PUT_U32(skb, NDTPA_PROXY_QLEN, parms->proxy_qlen);

	NLA_PUT_U32(skb, NDTPA_APP_PROBES, parms->app_probes);

	NLA_PUT_U32(skb, NDTPA_UCAST_PROBES, parms->ucast_probes);

	NLA_PUT_U32(skb, NDTPA_MCAST_PROBES, parms->mcast_probes);

	NLA_PUT_MSECS(skb, NDTPA_REACHABLE_TIME, parms->reachable_time);

	NLA_PUT_MSECS(skb, NDTPA_BASE_REACHABLE_TIME,

		      parms->base_reachable_time);

	NLA_PUT_MSECS(skb, NDTPA_GC_STALETIME, parms->gc_staletime);

	NLA_PUT_MSECS(skb, NDTPA_DELAY_PROBE_TIME, parms->delay_probe_time);

	NLA_PUT_MSECS(skb, NDTPA_RETRANS_TIME, parms->retrans_time);

	NLA_PUT_MSECS(skb, NDTPA_ANYCAST_DELAY, parms->anycast_delay);

	NLA_PUT_MSECS(skb, NDTPA_PROXY_DELAY, parms->proxy_delay);

	NLA_PUT_MSECS(skb, NDTPA_LOCKTIME, parms->locktime);



				     SKB_TRUESIZE(ETH_FRAME_LEN))) ||

	    nla_put_u32(skb, NDTPA_PROXY_QLEN, parms->proxy_qlen) ||

	    nla_put_u32(skb, NDTPA_APP_PROBES, parms->app_probes) ||

	    nla_put_u32(skb, NDTPA_UCAST_PROBES, parms->ucast_probes) ||

	    nla_put_u32(skb, NDTPA_MCAST_PROBES, parms->mcast_probes) ||

	    nla_put_msecs(skb, NDTPA_REACHABLE_TIME, parms->reachable_time) ||

	    nla_put_msecs(skb, NDTPA_BASE_REACHABLE_TIME,

			  parms->base_reachable_time) ||

	    nla_put_msecs(skb, NDTPA_GC_STALETIME, parms->gc_staletime) ||

	    nla_put_msecs(skb, NDTPA_DELAY_PROBE_TIME,

			  parms->delay_probe_time) ||

	    nla_put_msecs(skb, NDTPA_RETRANS_TIME, parms->retrans_time) ||

	    nla_put_msecs(skb, NDTPA_ANYCAST_DELAY, parms->anycast_delay) ||

	    nla_put_msecs(skb, NDTPA_PROXY_DELAY, parms->proxy_delay) ||

	    nla_put_msecs(skb, NDTPA_LOCKTIME, parms->locktime))

		goto nla_put_failure;

	return nla_nest_end(skb, nest);



nla_put_failure:
@@ -1815,12 +1815,12 @@ static int neightbl_fill_info(struct sk_buff *skb, struct neigh_table *tbl, 
	ndtmsg->ndtm_pad1   = 0;

	ndtmsg->ndtm_pad2   = 0;



	NLA_PUT_STRING(skb, NDTA_NAME, tbl->id);

	NLA_PUT_MSECS(skb, NDTA_GC_INTERVAL, tbl->gc_interval);

	NLA_PUT_U32(skb, NDTA_THRESH1, tbl->gc_thresh1);

	NLA_PUT_U32(skb, NDTA_THRESH2, tbl->gc_thresh2);

	NLA_PUT_U32(skb, NDTA_THRESH3, tbl->gc_thresh3);



	if (nla_put_string(skb, NDTA_NAME, tbl->id) ||

	    nla_put_msecs(skb, NDTA_GC_INTERVAL, tbl->gc_interval) ||

	    nla_put_u32(skb, NDTA_THRESH1, tbl->gc_thresh1) ||

	    nla_put_u32(skb, NDTA_THRESH2, tbl->gc_thresh2) ||

	    nla_put_u32(skb, NDTA_THRESH3, tbl->gc_thresh3))

		goto nla_put_failure;

	{

		unsigned long now = jiffies;

		unsigned int flush_delta = now - tbl->last_flush;
@@ -1841,7 +1841,8 @@ static int neightbl_fill_info(struct sk_buff *skb, struct neigh_table *tbl, 
		ndc.ndtc_hash_mask = ((1 << nht->hash_shift) - 1);

		rcu_read_unlock_bh();



		NLA_PUT(skb, NDTA_CONFIG, sizeof(ndc), &ndc);

		if (nla_put(skb, NDTA_CONFIG, sizeof(ndc), &ndc))

			goto nla_put_failure;

	}



	{
@@ -1866,7 +1867,8 @@ static int neightbl_fill_info(struct sk_buff *skb, struct neigh_table *tbl, 
			ndst.ndts_forced_gc_runs	+= st->forced_gc_runs;

		}



		NLA_PUT(skb, NDTA_STATS, sizeof(ndst), &ndst);

		if (nla_put(skb, NDTA_STATS, sizeof(ndst), &ndst))

			goto nla_put_failure;

	}



	BUG_ON(tbl->parms.dev);
@@ -2137,7 +2139,8 @@ static int neigh_fill_info(struct sk_buff *skb, struct neighbour *neigh, 
	ndm->ndm_type	 = neigh->type;

	ndm->ndm_ifindex = neigh->dev->ifindex;



	NLA_PUT(skb, NDA_DST, neigh->tbl->key_len, neigh->primary_key);

	if (nla_put(skb, NDA_DST, neigh->tbl->key_len, neigh->primary_key))

		goto nla_put_failure;



	read_lock_bh(&neigh->lock);

	ndm->ndm_state	 = neigh->nud_state;
@@ -2157,8 +2160,9 @@ static int neigh_fill_info(struct sk_buff *skb, struct neighbour *neigh, 
	ci.ndm_refcnt	 = atomic_read(&neigh->refcnt) - 1;

	read_unlock_bh(&neigh->lock);



	NLA_PUT_U32(skb, NDA_PROBES, atomic_read(&neigh->probes));

	NLA_PUT(skb, NDA_CACHEINFO, sizeof(ci), &ci);

	if (nla_put_u32(skb, NDA_PROBES, atomic_read(&neigh->probes)) ||

	    nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci))

		goto nla_put_failure;



	return nlmsg_end(skb, nlh);
@@ -2187,7 +2191,8 @@ static int pneigh_fill_info(struct sk_buff *skb, struct pneigh_entry *pn, 
	ndm->ndm_ifindex = pn->dev->ifindex;

	ndm->ndm_state	 = NUD_NONE;



	NLA_PUT(skb, NDA_DST, tbl->key_len, pn->key);

	if (nla_put(skb, NDA_DST, tbl->key_len, pn->key))

		goto nla_put_failure;



	return nlmsg_end(skb, nlh);