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ipv4: Stop using NLA_PUT*().

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

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2012-04-01 20:39:02 -04:00
parent e549a6b3a5
commit f3756b79e8
6 changed files with 87 additions and 73 deletions
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45
net/ipv4/route.c
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@@ -2973,7 +2973,8 @@ static int rt_fill_info(struct net *net,
r->rtm_src_len = 0;
r->rtm_tos = rt->rt_key_tos;
r->rtm_table = RT_TABLE_MAIN;
NLA_PUT_U32(skb, RTA_TABLE, RT_TABLE_MAIN);
if (nla_put_u32(skb, RTA_TABLE, RT_TABLE_MAIN))
goto nla_put_failure;
r->rtm_type = rt->rt_type;
r->rtm_scope = RT_SCOPE_UNIVERSE;
r->rtm_protocol = RTPROT_UNSPEC;
@@ -2981,31 +2982,38 @@ static int rt_fill_info(struct net *net,
if (rt->rt_flags & RTCF_NOTIFY)
r->rtm_flags |= RTM_F_NOTIFY;
NLA_PUT_BE32(skb, RTA_DST, rt->rt_dst);
if (nla_put_be32(skb, RTA_DST, rt->rt_dst))
goto nla_put_failure;
if (rt->rt_key_src) {
r->rtm_src_len = 32;
NLA_PUT_BE32(skb, RTA_SRC, rt->rt_key_src);
if (nla_put_be32(skb, RTA_SRC, rt->rt_key_src))
goto nla_put_failure;
}
if (rt->dst.dev)
NLA_PUT_U32(skb, RTA_OIF, rt->dst.dev->ifindex);
if (rt->dst.dev &&
nla_put_u32(skb, RTA_OIF, rt->dst.dev->ifindex))
goto nla_put_failure;
#ifdef CONFIG_IP_ROUTE_CLASSID
if (rt->dst.tclassid)
NLA_PUT_U32(skb, RTA_FLOW, rt->dst.tclassid);
if (rt->dst.tclassid &&
nla_put_u32(skb, RTA_FLOW, rt->dst.tclassid))
goto nla_put_failure;
#endif
if (rt_is_input_route(rt))
NLA_PUT_BE32(skb, RTA_PREFSRC, rt->rt_spec_dst);
else if (rt->rt_src != rt->rt_key_src)
NLA_PUT_BE32(skb, RTA_PREFSRC, rt->rt_src);
if (rt->rt_dst != rt->rt_gateway)
NLA_PUT_BE32(skb, RTA_GATEWAY, rt->rt_gateway);
if (rt_is_input_route(rt)) {
if (nla_put_be32(skb, RTA_PREFSRC, rt->rt_spec_dst))
goto nla_put_failure;
} else if (rt->rt_src != rt->rt_key_src) {
if (nla_put_be32(skb, RTA_PREFSRC, rt->rt_src))
goto nla_put_failure;
}
if (rt->rt_dst != rt->rt_gateway &&
nla_put_be32(skb, RTA_GATEWAY, rt->rt_gateway))
goto nla_put_failure;
if (rtnetlink_put_metrics(skb, dst_metrics_ptr(&rt->dst)) < 0)
goto nla_put_failure;
if (rt->rt_mark)
NLA_PUT_BE32(skb, RTA_MARK, rt->rt_mark);
if (rt->rt_mark &&
nla_put_be32(skb, RTA_MARK, rt->rt_mark))
goto nla_put_failure;
error = rt->dst.error;
if (peer) {
@@ -3046,7 +3054,8 @@ static int rt_fill_info(struct net *net,
}
} else
#endif
NLA_PUT_U32(skb, RTA_IIF, rt->rt_iif);
if (nla_put_u32(skb, RTA_IIF, rt->rt_iif))
goto nla_put_failure;
}
if (rtnl_put_cacheinfo(skb, &rt->dst, id, ts, tsage,