[PATCH AUTOSEL 4.19 084/172] pinctrl: rockchip: fix memleak in rockchip_dt_node_to_map

Sasha Levin
2020-06-18T02:01:32Z

From: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>

[ Upstream commit d7faa8ffb6be57bf8233a4b5a636d76b83c51ce7 ]

In function rockchip_dt_node_to_map, a new_map variable is
allocated by:

new_map = devm_kcalloc(pctldev->dev, map_num, sizeof(*new_map),
GFP_KERNEL);

This uses devres and attaches new_map to the pinctrl driver.
This cause a leak since new_map is not released when the probed
driver is removed. Fix it by using kcalloc to allocate new_map
and free it in `rockchip_dt_free_map`

Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20200506100903.15420-1-dafna.hirschfeld@collabora.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/pinctrl/pinctrl-rockchip.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index 8d83817935da..005df24f5b3f 100644
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -507,8 +507,8 @@ static int rockchip_dt_node_to_map(struct pinctrl_dev *pctldev,
}

map_num += grp->npins;
- new_map = devm_kcalloc(pctldev->dev, map_num, sizeof(*new_map),
- GFP_KERNEL);
+
+ new_map = kcalloc(map_num, sizeof(*new_map), GFP_KERNEL);
if (!new_map)
return -ENOMEM;

@@ -518,7 +518,7 @@ static int rockchip_dt_node_to_map(struct pinctrl_dev *pctldev,
/* create mux map */
parent = of_get_parent(np);
if (!parent) {
- devm_kfree(pctldev->dev, new_map);
+ kfree(new_map);
return -EINVAL;
}
new_map[0].type = PIN_MAP_TYPE_MUX_GROUP;
@@ -545,6 +545,7 @@ static int rockchip_dt_node_to_map(struct pinctrl_dev *pctldev,
static void rockchip_dt_free_map(struct pinctrl_dev *pctldev,
struct pinctrl_map *map, unsigned num_maps)
{
+ kfree(map);
}

static const struct pinctrl_ops rockchip_pctrl_ops = {
--
2.25.1