netfilter: nf_conntrack: fix lifetime display for disabled connections

When no tstamp extension exists, ct_delta_time() returns -1, which is
then assigned to an u64 and tested for negative values to decide
whether to display the lifetime. This obviously doesn't work, use
a s64 and merge the two minor functions into one.

Signed-off-by: Patrick McHardy <kaber@trash.net>

1 files changed, 12 insertions, 17 deletions

diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c
index 69107fd78d3e..0ae142825881 100644
--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
@@ -141,29 +141,24 @@ static inline int ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
 #endif
 
 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
-static u_int64_t ct_delta_time(u_int64_t time_now, const struct nf_conn *ct)
+static int ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
 {
+        struct ct_iter_state *st = s->private;
         struct nf_conn_tstamp *tstamp;
+        s64 delta_time;
 
         tstamp = nf_conn_tstamp_find(ct);
         if (tstamp) {
-                u_int64_t delta_time = time_now - tstamp->start;
-                return delta_time > 0 ? div_s64(delta_time, NSEC_PER_SEC) : 0;
+                delta_time = st->time_now - tstamp->start;
+                if (delta_time > 0)
+                        delta_time = div_s64(delta_time, NSEC_PER_SEC);
+                else
+                        delta_time = 0;
+
+                return seq_printf(s, "delta-time=%llu ",
+                                  (unsigned long long)delta_time);
         }
-        return -1;
-}
-
-static int ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
-{
-        struct ct_iter_state *st = s->private;
-        u_int64_t delta_time;
-
-        delta_time = ct_delta_time(st->time_now, ct);
-        if (delta_time < 0)
-                return 0;
-
-        return seq_printf(s, "delta-time=%llu ",
-                          (unsigned long long)delta_time);
+        return 0;
 }
 #else
 static inline int