neigh_stat_seq_next() should increase position index

if seq_file .next fuction does not change position index,
read after some lseek can generate unexpected output.

https://bugzilla.kernel.org/show_bug.cgi?id=206283
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 920784a9b7ffaf0140c8e4427e327ec8867c2a2a..789a73aa7bd87b3492e983f8c6c6723e1e3c6bc5 100644 (file)
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -3290,6 +3290,7 @@ static void *neigh_stat_seq_next(struct seq_file *seq, void *v, loff_t *pos)
                *pos = cpu+1;
                return per_cpu_ptr(tbl->stats, cpu);
        }
+       (*pos)++;
        return NULL;
 }