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help_next should increase position index 

[ Upstream commit 9f198a2ac5 ]

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: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Vasily Averin 2020-01-24 09:10:47 +03:00 committed by Greg Kroah-Hartman
parent 6b851823ce
commit 6fa2bb0d06
1 changed files with 1 additions and 0 deletions
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fs/orangefs/orangefs-debugfs.c
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@ -273,6 +273,7 @@ static void *help_start(struct seq_file *m, loff_t *pos)
static void *help_next(struct seq_file *m, void *v, loff_t *pos)
{
(*pos)++;
gossip_debug(GOSSIP_DEBUGFS_DEBUG, "help_next: start\n");
return NULL;