From c8ff91535880d41b49699b3829fb6151942de29e Mon Sep 17 00:00:00 2001
From: Nam Cao <namcaov@gmail.com>
Date: Fri, 9 Sep 2022 16:13:39 +0200
Subject: [PATCH] staging: vt6655: fix potential memory leak
Git-commit: c8ff91535880d41b49699b3829fb6151942de29e
Patch-mainline: v6.1-rc1
References: git-fixes

In function device_init_td0_ring, memory is allocated for member
td_info of priv->apTD0Rings[i], with i increasing from 0. In case of
allocation failure, the memory is freed in reversed order, with i
decreasing to 0. However, the case i=0 is left out and thus memory is
leaked.

Modify the memory freeing loop to include the case i=0.

Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Signed-off-by: Nam Cao <namcaov@gmail.com>
Link: https://lore.kernel.org/r/20220909141338.19343-1-namcaov@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/staging/vt6655/device_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/vt6655/device_main.c b/drivers/staging/vt6655/device_main.c
index 0d8876278953..04d737012cef 100644
--- a/drivers/staging/vt6655/device_main.c
+++ b/drivers/staging/vt6655/device_main.c
@@ -742,7 +742,7 @@ static int device_init_td0_ring(struct vnt_private *priv)
 	return 0;
 
 err_free_desc:
-	while (--i) {
+	while (i--) {
 		desc = &priv->apTD0Rings[i];
 		kfree(desc->td_info);
 	}
-- 
2.35.3