netdev - [PATCH 5/6] netfilter: nf_ct_expect: Change __nf_ct_expect

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Message-Id: <1488195342-2678-6-git-send-email-pablo@netfilter.org>
Date:   Mon, 27 Feb 2017 12:35:41 +0100
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     netfilter-devel@...r.kernel.org
Cc:     davem@...emloft.net, netdev@...r.kernel.org
Subject: [PATCH 5/6] netfilter: nf_ct_expect: Change __nf_ct_expect_check() return value.

From: Jarno Rajahalme <jarno@....org>

Commit 4dee62b1b9b4 ("netfilter: nf_ct_expect: nf_ct_expect_insert()
returns void") inadvertently changed the successful return value of
nf_ct_expect_related_report() from 0 to 1 due to
__nf_ct_expect_check() returning 1 on success.  Prevent this
regression in the future by changing the return value of
__nf_ct_expect_check() to 0 on success.

Signed-off-by: Jarno Rajahalme <jarno@....org>
Acked-by: Joe Stringer <joe@....org>
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
---
 net/netfilter/nf_conntrack_expect.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/netfilter/nf_conntrack_expect.c b/net/netfilter/nf_conntrack_expect.c
index d6ace69d57dc..4b2e1fb28bb4 100644
--- a/net/netfilter/nf_conntrack_expect.c
+++ b/net/netfilter/nf_conntrack_expect.c
@@ -410,7 +410,7 @@ static inline int __nf_ct_expect_check(struct nf_conntrack_expect *expect)
 	struct net *net = nf_ct_exp_net(expect);
 	struct hlist_node *next;
 	unsigned int h;
-	int ret = 1;
+	int ret = 0;

 	if (!master_help) {
 		ret = -ESHUTDOWN;
@@ -460,7 +460,7 @@ int nf_ct_expect_related_report(struct nf_conntrack_expect *expect,

 	spin_lock_bh(&nf_conntrack_expect_lock);
 	ret = __nf_ct_expect_check(expect);
-	if (ret <= 0)
+	if (ret < 0)
 		goto out;

 	nf_ct_expect_insert(expect);
-- 
2.1.4