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pinctrl: rockchip: fix memleak in rockchip_dt_node_to_map 

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>
This commit is contained in:
Dafna Hirschfeld 2020-05-06 12:09:03 +02:00 committed by Linus Walleij
parent c4f333b758
commit d7faa8ffb6
1 changed files with 4 additions and 3 deletions
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7
drivers/pinctrl/pinctrl-rockchip.c
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@ -508,8 +508,8 @@ 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;
@ -519,7 +519,7 @@ 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;
@ -546,6 +546,7 @@ 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 = {