netfilter: nf_ct_expect: Change __nf_ct_expect_check() return value.

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@ovn.org>
Acked-by: Joe Stringer <joe@ovn.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files 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);