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    Subject[PATCH AUTOSEL 4.19 043/206] neigh_stat_seq_next() should increase position index
    Date
    From: Vasily Averin <vvs@virtuozzo.com>

    [ Upstream commit 1e3f9f073c47bee7c23e77316b07bc12338c5bba ]

    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>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    net/core/neighbour.c | 1 +
    1 file changed, 1 insertion(+)

    diff --git a/net/core/neighbour.c b/net/core/neighbour.c
    index bf738ec68cb53..6e890f51b7d86 100644
    --- a/net/core/neighbour.c
    +++ b/net/core/neighbour.c
    @@ -2844,6 +2844,7 @@ 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;
    }

    --
    2.25.1
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