From: Alexandre Torgue alexandre.torgue@st.com
commit cd8c9b5a49576bf28990237715bc2cb2210ac80a upstream.
configs is allocated by pinconf_generic_parse_dt_config(), pinctrl_utils_add_map_configs() duplicates configs so it can and has to be freed to prevent memory leaks.
Signed-off-by: Alexandre Torgue alexandre.torgue@st.com Signed-off-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Mathieu Poirier mathieu.poirier@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/pinctrl/stm32/pinctrl-stm32.c | 26 ++++++++++++++++---------- 1 file changed, 16 insertions(+), 10 deletions(-)
--- a/drivers/pinctrl/stm32/pinctrl-stm32.c +++ b/drivers/pinctrl/stm32/pinctrl-stm32.c @@ -410,7 +410,7 @@ static int stm32_pctrl_dt_subnode_to_map unsigned int num_configs; bool has_config = 0; unsigned reserve = 0; - int num_pins, num_funcs, maps_per_pin, i, err; + int num_pins, num_funcs, maps_per_pin, i, err = 0;
pctl = pinctrl_dev_get_drvdata(pctldev);
@@ -437,41 +437,45 @@ static int stm32_pctrl_dt_subnode_to_map if (has_config && num_pins >= 1) maps_per_pin++;
- if (!num_pins || !maps_per_pin) - return -EINVAL; + if (!num_pins || !maps_per_pin) { + err = -EINVAL; + goto exit; + }
reserve = num_pins * maps_per_pin;
err = pinctrl_utils_reserve_map(pctldev, map, reserved_maps, num_maps, reserve); if (err) - return err; + goto exit;
for (i = 0; i < num_pins; i++) { err = of_property_read_u32_index(node, "pinmux", i, &pinfunc); if (err) - return err; + goto exit;
pin = STM32_GET_PIN_NO(pinfunc); func = STM32_GET_PIN_FUNC(pinfunc);
if (!stm32_pctrl_is_function_valid(pctl, pin, func)) { dev_err(pctl->dev, "invalid function.\n"); - return -EINVAL; + err = -EINVAL; + goto exit; }
grp = stm32_pctrl_find_group_by_pin(pctl, pin); if (!grp) { dev_err(pctl->dev, "unable to match pin %d to group\n", pin); - return -EINVAL; + err = -EINVAL; + goto exit; }
err = stm32_pctrl_dt_node_to_map_func(pctl, pin, func, grp, map, reserved_maps, num_maps); if (err) - return err; + goto exit;
if (has_config) { err = pinctrl_utils_add_map_configs(pctldev, map, @@ -479,11 +483,13 @@ static int stm32_pctrl_dt_subnode_to_map configs, num_configs, PIN_MAP_TYPE_CONFIGS_GROUP); if (err) - return err; + goto exit; } }
- return 0; +exit: + kfree(configs); + return err; }
static int stm32_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev,