From: Vasily Averin <[email protected]> [ Upstream commit f4d74ef6220c1eda0875da30457bef5c7111ab06 ]
If seq_file .next function 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: Andrew Morton <[email protected]> Acked-by: Peter Oberparleiter <[email protected]> Cc: Al Viro <[email protected]> Cc: Davidlohr Bueso <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Manfred Spraul <[email protected]> Cc: NeilBrown <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Waiman Long <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Linus Torvalds <[email protected]> Signed-off-by: Sasha Levin <[email protected]> --- kernel/gcov/fs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/gcov/fs.c b/kernel/gcov/fs.c index 6e40ff6be083d..291e0797125b6 100644 --- a/kernel/gcov/fs.c +++ b/kernel/gcov/fs.c @@ -109,9 +109,9 @@ static void *gcov_seq_next(struct seq_file *seq, void *data, loff_t *pos) { struct gcov_iterator *iter = data; + (*pos)++; if (gcov_iter_next(iter)) return NULL; - (*pos)++; return iter; } -- 2.20.1
