| Message ID | 20190815060503.2853-1-nishkadg.linux@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | pinctrl: rza1: Add of_node_put() before return | expand |
CC Jacopo, Chris On Thu, Aug 15, 2019 at 8:05 AM Nishka Dasgupta <nishkadg.linux@gmail.com> wrote: > Each iteration of for_each_child_of_node puts the previous node, but in > the case of a return from the middle of the loop, there is no put, thus > causing a memory leak. Hence add an of_node_put before the return in > three places. > Issue found with Coccinelle. > > Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> i.e. will queue in sh-pfc-for-v5.4. Gr{oetje,eeting}s, Geert
diff --git a/drivers/pinctrl/pinctrl-rza1.c b/drivers/pinctrl/pinctrl-rza1.c index 021e37b7689e..8eeb9545137b 100644 --- a/drivers/pinctrl/pinctrl-rza1.c +++ b/drivers/pinctrl/pinctrl-rza1.c @@ -866,8 +866,10 @@ static int rza1_dt_node_pin_count(struct device_node *np) npins = 0; for_each_child_of_node(np, child) { of_pins = of_find_property(child, "pinmux", NULL); - if (!of_pins) + if (!of_pins) { + of_node_put(child); return -EINVAL; + } npins += of_pins->length / sizeof(u32); } @@ -1025,8 +1027,10 @@ static int rza1_dt_node_to_map(struct pinctrl_dev *pctldev, for_each_child_of_node(np, child) { ret = rza1_parse_pinmux_node(rza1_pctl, child, mux_conf, grpin); - if (ret < 0) + if (ret < 0) { + of_node_put(child); return ret; + } grpin += ret; mux_conf += ret; @@ -1272,8 +1276,10 @@ static int rza1_gpio_register(struct rza1_pinctrl *rza1_pctl) ret = rza1_parse_gpiochip(rza1_pctl, child, &gpio_chips[i], &gpio_ranges[i]); - if (ret) + if (ret) { + of_node_put(child); return ret; + } ++i; }
Each iteration of for_each_child_of_node puts the previous node, but in the case of a return from the middle of the loop, there is no put, thus causing a memory leak. Hence add an of_node_put before the return in three places. Issue found with Coccinelle. Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com> --- drivers/pinctrl/pinctrl-rza1.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)