[PATCH 6.0 806/862] staging: vt6655: fix potential memory leak

From: Greg Kroah-Hartman
Date: Wed Oct 19 2022 - 06:38:32 EST


From: Nam Cao <namcaov@xxxxxxxxx>

[ 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@xxxxxxxxx>
Signed-off-by: Nam Cao <namcaov@xxxxxxxxx>
Link: https://lore.kernel.org/r/20220909141338.19343-1-namcaov@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 d76f65756db8..ec7c991e745b 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);
}
--
2.35.1