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Commit f3756b79 authored by David S. Miller's avatar David S. Miller
Browse files

ipv4: 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 e549a6b3

net/ipv4/devinet.c

+9 −11
Original line number Diff line number Diff line
@@ -1267,17 +1267,15 @@ static int inet_fill_ifaddr(struct sk_buff *skb, struct in_ifaddr *ifa, 
	ifm->ifa_scope = ifa->ifa_scope;

	ifm->ifa_index = ifa->ifa_dev->dev->ifindex;



	if (ifa->ifa_address)

		NLA_PUT_BE32(skb, IFA_ADDRESS, ifa->ifa_address);



	if (ifa->ifa_local)

		NLA_PUT_BE32(skb, IFA_LOCAL, ifa->ifa_local);



	if (ifa->ifa_broadcast)

		NLA_PUT_BE32(skb, IFA_BROADCAST, ifa->ifa_broadcast);



	if (ifa->ifa_label[0])

		NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label);

	if ((ifa->ifa_address &&

	     nla_put_be32(skb, IFA_ADDRESS, ifa->ifa_address)) ||

	    (ifa->ifa_local &&

	     nla_put_be32(skb, IFA_LOCAL, ifa->ifa_local)) ||

	    (ifa->ifa_broadcast &&

	     nla_put_be32(skb, IFA_BROADCAST, ifa->ifa_broadcast)) ||

	    (ifa->ifa_label[0] &&

	     nla_put_string(skb, IFA_LABEL, ifa->ifa_label)))

		goto nla_put_failure;



	return nlmsg_end(skb, nlh);

net/ipv4/fib_rules.c

+8 −8
Original line number Diff line number Diff line
@@ -221,15 +221,15 @@ static int fib4_rule_fill(struct fib_rule *rule, struct sk_buff *skb, 
	frh->src_len = rule4->src_len;

	frh->tos = rule4->tos;



	if (rule4->dst_len)

		NLA_PUT_BE32(skb, FRA_DST, rule4->dst);



	if (rule4->src_len)

		NLA_PUT_BE32(skb, FRA_SRC, rule4->src);



	if ((rule4->dst_len &&

	     nla_put_be32(skb, FRA_DST, rule4->dst)) ||

	    (rule4->src_len &&

	     nla_put_be32(skb, FRA_SRC, rule4->src)))

		goto nla_put_failure;

#ifdef CONFIG_IP_ROUTE_CLASSID

	if (rule4->tclassid)

		NLA_PUT_U32(skb, FRA_FLOW, rule4->tclassid);

	if (rule4->tclassid &&

	    nla_put_u32(skb, FRA_FLOW, rule4->tclassid))

		goto nla_put_failure;

#endif

	return 0;

net/ipv4/fib_semantics.c

+26 −21
Original line number Diff line number Diff line
@@ -932,33 +932,36 @@ int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event, 
		rtm->rtm_table = tb_id;

	else

		rtm->rtm_table = RT_TABLE_COMPAT;

	NLA_PUT_U32(skb, RTA_TABLE, tb_id);

	if (nla_put_u32(skb, RTA_TABLE, tb_id))

		goto nla_put_failure;

	rtm->rtm_type = type;

	rtm->rtm_flags = fi->fib_flags;

	rtm->rtm_scope = fi->fib_scope;

	rtm->rtm_protocol = fi->fib_protocol;



	if (rtm->rtm_dst_len)

		NLA_PUT_BE32(skb, RTA_DST, dst);



	if (fi->fib_priority)

		NLA_PUT_U32(skb, RTA_PRIORITY, fi->fib_priority);



	if (rtm->rtm_dst_len &&

	    nla_put_be32(skb, RTA_DST, dst))

		goto nla_put_failure;

	if (fi->fib_priority &&

	    nla_put_u32(skb, RTA_PRIORITY, fi->fib_priority))

		goto nla_put_failure;

	if (rtnetlink_put_metrics(skb, fi->fib_metrics) < 0)

		goto nla_put_failure;



	if (fi->fib_prefsrc)

		NLA_PUT_BE32(skb, RTA_PREFSRC, fi->fib_prefsrc);



	if (fi->fib_prefsrc &&

	    nla_put_be32(skb, RTA_PREFSRC, fi->fib_prefsrc))

		goto nla_put_failure;

	if (fi->fib_nhs == 1) {

		if (fi->fib_nh->nh_gw)

			NLA_PUT_BE32(skb, RTA_GATEWAY, fi->fib_nh->nh_gw);



		if (fi->fib_nh->nh_oif)

			NLA_PUT_U32(skb, RTA_OIF, fi->fib_nh->nh_oif);

		if (fi->fib_nh->nh_gw &&

		    nla_put_be32(skb, RTA_GATEWAY, fi->fib_nh->nh_gw))

			goto nla_put_failure;

		if (fi->fib_nh->nh_oif &&

		    nla_put_u32(skb, RTA_OIF, fi->fib_nh->nh_oif))

			goto nla_put_failure;

#ifdef CONFIG_IP_ROUTE_CLASSID

		if (fi->fib_nh[0].nh_tclassid)

			NLA_PUT_U32(skb, RTA_FLOW, fi->fib_nh[0].nh_tclassid);

		if (fi->fib_nh[0].nh_tclassid &&

		    nla_put_u32(skb, RTA_FLOW, fi->fib_nh[0].nh_tclassid))

			goto nla_put_failure;

#endif

	}

#ifdef CONFIG_IP_ROUTE_MULTIPATH
@@ -979,11 +982,13 @@ int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event, 
			rtnh->rtnh_hops = nh->nh_weight - 1;

			rtnh->rtnh_ifindex = nh->nh_oif;



			if (nh->nh_gw)

				NLA_PUT_BE32(skb, RTA_GATEWAY, nh->nh_gw);

			if (nh->nh_gw &&

			    nla_put_be32(skb, RTA_GATEWAY, nh->nh_gw))

				goto nla_put_failure;

#ifdef CONFIG_IP_ROUTE_CLASSID

			if (nh->nh_tclassid)

				NLA_PUT_U32(skb, RTA_FLOW, nh->nh_tclassid);

			if (nh->nh_tclassid &&

			    nla_put_u32(skb, RTA_FLOW, nh->nh_tclassid))

				goto nla_put_failure;

#endif

			/* length of rtnetlink header + attributes */

			rtnh->rtnh_len = nlmsg_get_pos(skb) - (void *) rtnh;

net/ipv4/ip_gre.c

+12 −11
Original line number Diff line number Diff line
@@ -1654,17 +1654,18 @@ static int ipgre_fill_info(struct sk_buff *skb, const struct net_device *dev) 
	struct ip_tunnel *t = netdev_priv(dev);

	struct ip_tunnel_parm *p = &t->parms;



	NLA_PUT_U32(skb, IFLA_GRE_LINK, p->link);

	NLA_PUT_BE16(skb, IFLA_GRE_IFLAGS, p->i_flags);

	NLA_PUT_BE16(skb, IFLA_GRE_OFLAGS, p->o_flags);

	NLA_PUT_BE32(skb, IFLA_GRE_IKEY, p->i_key);

	NLA_PUT_BE32(skb, IFLA_GRE_OKEY, p->o_key);

	NLA_PUT_BE32(skb, IFLA_GRE_LOCAL, p->iph.saddr);

	NLA_PUT_BE32(skb, IFLA_GRE_REMOTE, p->iph.daddr);

	NLA_PUT_U8(skb, IFLA_GRE_TTL, p->iph.ttl);

	NLA_PUT_U8(skb, IFLA_GRE_TOS, p->iph.tos);

	NLA_PUT_U8(skb, IFLA_GRE_PMTUDISC, !!(p->iph.frag_off & htons(IP_DF)));



	if (nla_put_u32(skb, IFLA_GRE_LINK, p->link) ||

	    nla_put_be16(skb, IFLA_GRE_IFLAGS, p->i_flags) ||

	    nla_put_be16(skb, IFLA_GRE_OFLAGS, p->o_flags) ||

	    nla_put_be32(skb, IFLA_GRE_IKEY, p->i_key) ||

	    nla_put_be32(skb, IFLA_GRE_OKEY, p->o_key) ||

	    nla_put_be32(skb, IFLA_GRE_LOCAL, p->iph.saddr) ||

	    nla_put_be32(skb, IFLA_GRE_REMOTE, p->iph.daddr) ||

	    nla_put_u8(skb, IFLA_GRE_TTL, p->iph.ttl) ||

	    nla_put_u8(skb, IFLA_GRE_TOS, p->iph.tos) ||

	    nla_put_u8(skb, IFLA_GRE_PMTUDISC,

		       !!(p->iph.frag_off & htons(IP_DF))))

		goto nla_put_failure;

	return 0;



nla_put_failure:

net/ipv4/ipmr.c

+5 −4
Original line number Diff line number Diff line
@@ -2120,15 +2120,16 @@ static int ipmr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb, 
	rtm->rtm_src_len  = 32;

	rtm->rtm_tos      = 0;

	rtm->rtm_table    = mrt->id;

	NLA_PUT_U32(skb, RTA_TABLE, mrt->id);

	if (nla_put_u32(skb, RTA_TABLE, mrt->id))

		goto nla_put_failure;

	rtm->rtm_type     = RTN_MULTICAST;

	rtm->rtm_scope    = RT_SCOPE_UNIVERSE;

	rtm->rtm_protocol = RTPROT_UNSPEC;

	rtm->rtm_flags    = 0;



	NLA_PUT_BE32(skb, RTA_SRC, c->mfc_origin);

	NLA_PUT_BE32(skb, RTA_DST, c->mfc_mcastgrp);



	if (nla_put_be32(skb, RTA_SRC, c->mfc_origin) ||

	    nla_put_be32(skb, RTA_DST, c->mfc_mcastgrp))

		goto nla_put_failure;

	if (__ipmr_fill_mroute(mrt, skb, c, rtm) < 0)

		goto nla_put_failure;