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seq_tab_next() should increase position index

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[ Upstream commit 70a87287c821e9721b62463777f55ba588ac4623 ]

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>
This commit is contained in:
Vasily Averin 2020-01-23 10:11:08 +03:00 committed by Greg Kroah-Hartman
parent 772c96a03b
commit b2fd13e9ce
1 changed files with 1 additions and 2 deletions
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3
drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
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@ -66,8 +66,7 @@ static void *seq_tab_start(struct seq_file *seq, loff_t *pos)
static void *seq_tab_next(struct seq_file *seq, void *v, loff_t *pos)
{
v = seq_tab_get_idx(seq->private, *pos + 1);
if (v)
++*pos;
++(*pos);
return v;
}