From: Nam Cao <namcaov@gmail.com>
Date: Fri, 9 Sep 2022 14:13:39 +0000 (+0200)
Subject: staging: vt6655: fix potential memory leak
X-Git-Tag: v6.0.3~58
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=cfdf139258614ef65b0f68b857ada5328fb7c0e5;p=thirdparty%2Fkernel%2Fstable.git

staging: vt6655: fix potential memory leak

[ Upstream commit c8ff91535880d41b49699b3829fb6151942de29e ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/staging/vt6655/device_main.c b/drivers/staging/vt6655/device_main.c
index d76f65756db85..ec7c991e745b7 100644
--- a/drivers/staging/vt6655/device_main.c
+++ b/drivers/staging/vt6655/device_main.c
@@ -694,7 +694,7 @@ 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);
 	}