From f80c24d9964c8a15c55d1afc2dea327c5eff7d6b Mon Sep 17 00:00:00 2001 From: Allan Stephens Date: Thu, 3 Nov 2011 11:12:01 -0400 Subject: [PATCH] tipc: Add check to prevent insertion of duplicate name table entries Adds a new check to TIPC's name table logic to reject any attempt to create a new name publication that is identical to an existing one. (Such an attempt will never happen under normal circumstances, but could arise if another network node malfunctions and issues a duplicate name publication message.) Signed-off-by: Allan Stephens Signed-off-by: Paul Gortmaker --- net/tipc/name_table.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c index 1196f050e334..c2224f98e64f 100644 --- a/net/tipc/name_table.c +++ b/net/tipc/name_table.c @@ -268,6 +268,13 @@ static struct publication *tipc_nameseq_insert_publ(struct name_seq *nseq, } info = sseq->info; + + /* Check if an identical publication already exists */ + list_for_each_entry(publ, &info->zone_list, zone_list) { + if ((publ->ref == port) && (publ->key == key) && + (!publ->node || (publ->node == node))) + return NULL; + } } else { u32 inspos; struct sub_seq *freesseq;