From 5b7d616dbccc2fd6ae959045e1a9ca17de5dfc2a Mon Sep 17 00:00:00 2001 From: Ido Schimmel Date: Thu, 9 Feb 2017 10:28:40 +0100 Subject: [PATCH] ipv4: fib: Send notification before deleting FIB alias When a FIB alias is replaced following NLM_F_REPLACE, the ENTRY_ADD notification is sent after the reference on the previous FIB info was dropped. This is problematic as potential listeners might need to access it in their notification blocks. Solve this by sending the notification prior to the deletion of the replaced FIB alias. This is consistent with ENTRY_DEL notifications. Signed-off-by: Ido Schimmel Signed-off-by: Jiri Pirko CC: Patrick McHardy Signed-off-by: David S. Miller --- net/ipv4/fib_trie.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c index b0bfb1c..1c4d42e 100644 --- a/net/ipv4/fib_trie.c +++ b/net/ipv4/fib_trie.c @@ -1295,6 +1295,13 @@ int fib_table_insert(struct net *net, struct fib_table *tb, new_fa->tb_id = tb->tb_id; new_fa->fa_default = -1; + call_fib_entry_notifiers(net, FIB_EVENT_ENTRY_ADD, + key, plen, fi, + new_fa->fa_tos, cfg->fc_type, + tb->tb_id, nlflags); + rtmsg_fib(RTM_NEWROUTE, htonl(key), new_fa, plen, + tb->tb_id, &cfg->fc_nlinfo, nlflags); + hlist_replace_rcu(&fa->fa_list, &new_fa->fa_list); alias_free_mem_rcu(fa); @@ -1303,13 +1310,6 @@ int fib_table_insert(struct net *net, struct fib_table *tb, if (state & FA_S_ACCESSED) rt_cache_flush(cfg->fc_nlinfo.nl_net); - call_fib_entry_notifiers(net, FIB_EVENT_ENTRY_ADD, - key, plen, fi, - new_fa->fa_tos, cfg->fc_type, - tb->tb_id, cfg->fc_nlflags); - rtmsg_fib(RTM_NEWROUTE, htonl(key), new_fa, plen, - tb->tb_id, &cfg->fc_nlinfo, nlflags); - goto succeeded; } /* Error if we find a perfect match which -- 2.7.4