From 2eb812e6501597e8b4bc4fdef2db8158c1a3afb6 Mon Sep 17 00:00:00 2001 From: "David S. Miller" <davem@davemloft.net> Date: Sun, 1 Apr 2012 20:49:54 -0400 Subject: [PATCH] bridge: 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: David S. Miller <davem@davemloft.net> --- net/bridge/br_fdb.c | 8 ++++---- net/bridge/br_netlink.c | 25 +++++++++++-------------- 2 files changed, 15 insertions(+), 18 deletions(-) diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c index 5ba0c844d508..80dbce4974ce 100644 --- a/net/bridge/br_fdb.c +++ b/net/bridge/br_fdb.c @@ -487,14 +487,14 @@ static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br, ndm->ndm_ifindex = fdb->dst ? fdb->dst->dev->ifindex : br->dev->ifindex; ndm->ndm_state = fdb_to_nud(fdb); - NLA_PUT(skb, NDA_LLADDR, ETH_ALEN, &fdb->addr); - + if (nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->addr)) + goto nla_put_failure; ci.ndm_used = jiffies_to_clock_t(now - fdb->used); ci.ndm_confirmed = 0; ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); ci.ndm_refcnt = 0; - NLA_PUT(skb, NDA_CACHEINFO, sizeof(ci), &ci); - + if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) + goto nla_put_failure; return nlmsg_end(skb, nlh); nla_put_failure: diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c index a1daf8227ed1..346b368d8698 100644 --- a/net/bridge/br_netlink.c +++ b/net/bridge/br_netlink.c @@ -60,20 +60,17 @@ static int br_fill_ifinfo(struct sk_buff *skb, const struct net_bridge_port *por hdr->ifi_flags = dev_get_flags(dev); hdr->ifi_change = 0; - NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); - NLA_PUT_U32(skb, IFLA_MASTER, br->dev->ifindex); - NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); - NLA_PUT_U8(skb, IFLA_OPERSTATE, operstate); - - if (dev->addr_len) - NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); - - if (dev->ifindex != dev->iflink) - NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); - - if (event == RTM_NEWLINK) - NLA_PUT_U8(skb, IFLA_PROTINFO, port->state); - + if (nla_put_string(skb, IFLA_IFNAME, dev->name) || + nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) || + nla_put_u32(skb, IFLA_MTU, dev->mtu) || + nla_put_u8(skb, IFLA_OPERSTATE, operstate) || + (dev->addr_len && + nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || + (dev->ifindex != dev->iflink && + nla_put_u32(skb, IFLA_LINK, dev->iflink)) || + (event == RTM_NEWLINK && + nla_put_u8(skb, IFLA_PROTINFO, port->state))) + goto nla_put_failure; return nlmsg_end(skb, nlh); nla_put_failure: -- GitLab