From 22e7410b760b9c1777839fdd10382c60df8cbda2 Mon Sep 17 00:00:00 2001 From: Yasuyuki Kozakai Date: Mon, 27 Nov 2006 10:25:59 -0800 Subject: [PATCH] [NETFILTER]: nf_conntrack: fix the race on assign helper to new conntrack The found helper cannot be assigned to conntrack after unlocking nf_conntrack_lock. This tries to find helper to assign again. Signed-off-by: Yasuyuki Kozakai Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/netfilter/nf_conntrack_core.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 836541e509fe..0f5830779b44 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -893,12 +893,6 @@ __nf_conntrack_alloc(const struct nf_conntrack_tuple *orig, memset(conntrack, 0, nf_ct_cache[features].size); conntrack->features = features; - if (helper) { - struct nf_conn_help *help = nfct_help(conntrack); - NF_CT_ASSERT(help); - help->helper = helper; - } - atomic_set(&conntrack->ct_general.use, 1); conntrack->ct_general.destroy = destroy_conntrack; conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple = *orig; @@ -982,8 +976,13 @@ init_conntrack(const struct nf_conntrack_tuple *tuple, #endif nf_conntrack_get(&conntrack->master->ct_general); NF_CT_STAT_INC(expect_new); - } else + } else { + struct nf_conn_help *help = nfct_help(conntrack); + + if (help) + help->helper = __nf_ct_helper_find(&repl_tuple); NF_CT_STAT_INC(new); + } /* Overload tuple linked list to put us in unconfirmed list. */ list_add(&conntrack->tuplehash[IP_CT_DIR_ORIGINAL].list, &unconfirmed); -- GitLab