From: Vincent Fu <vincent.fu@samsung.com>
Date: Fri, 3 Dec 2021 21:10:10 +0000 (+0000)
Subject: io_ddir: return appropriate string for DDIR_INVAL
X-Git-Tag: fio-3.29~21
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=5ea6ec73f15e7eaa4fda497f76fd9dacba36c284;p=fio.git

io_ddir: return appropriate string for DDIR_INVAL

When looking up the appropriate name for a data direction, make sure the
array index is non-negative. This ensures that we return an appropriate
string for DDIR_INVAL.

Signed-off-by: Vincent Fu <vincent.fu@samsung.com>
Link: https://lore.kernel.org/r/20211203211050.51241-2-vincent.fu@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/io_ddir.h b/io_ddir.h
index a42da97a..296a9d04 100644
--- a/io_ddir.h
+++ b/io_ddir.h
@@ -24,7 +24,7 @@ static inline const char *io_ddir_name(enum fio_ddir ddir)
 					"datasync", "sync_file_range",
 					"wait", };
 
-	if (ddir < DDIR_LAST)
+	if (ddir >= 0 && ddir < DDIR_LAST)
 		return name[ddir];
 
 	return "invalid";