help_next should increase position index

[ Upstream commit 9f198a2 ]

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 <[email protected]>
Signed-off-by: Mike Marshall <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>

Author: vaverin

fs/orangefs/orangefs-debugfs.c

@@ -305,6 +305,7 @@ 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;