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    Subject[PATCH AUTOSEL 4.9 19/90] rt_cpu_seq_next should increase position index
    Date
    From: Vasily Averin <vvs@virtuozzo.com>

    [ Upstream commit a3ea86739f1bc7e121d921842f0f4a8ab1af94d9 ]

    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/ipv4/route.c | 1 +
    1 file changed, 1 insertion(+)

    diff --git a/net/ipv4/route.c b/net/ipv4/route.c
    index c8c51bd2d695b..e9aae4686536a 100644
    --- a/net/ipv4/route.c
    +++ b/net/ipv4/route.c
    @@ -271,6 +271,7 @@ static void *rt_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
    *pos = cpu+1;
    return &per_cpu(rt_cache_stat, cpu);
    }
    + (*pos)++;
    return NULL;

    }
    --
    2.25.1
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