* [cip-dev] [PATCH 4.4.y-cip] gpio: rcar: Avoid NULL pointer access in gpio_rcar_set_multiple()
@ 2020-09-04 7:40 Lad Prabhakar
2020-09-09 7:02 ` Pavel Machek
0 siblings, 1 reply; 2+ messages in thread
From: Lad Prabhakar @ 2020-09-04 7:40 UTC (permalink / raw)
To: cip-dev, Nobuhiro Iwamatsu, Pavel Machek; +Cc: Biju Das
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gpiochip_get_data() expects the controller probe to call
gpiochip_add_data() before using it, where as the rcar-gpio
driver probe has gpiochip_add() call thus resulting in NULL
pointer access.
Avoid this case by using gpio_to_priv() call.
Fixes: 6e52cced1aa58 ("gpio: rcar: Implement gpiochip.set_multiple()")
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
drivers/gpio/gpio-rcar.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c
index e829f11aca8f..2778dcd96ae7 100644
--- a/drivers/gpio/gpio-rcar.c
+++ b/drivers/gpio/gpio-rcar.c
@@ -352,7 +352,7 @@ static void gpio_rcar_set(struct gpio_chip *chip, unsigned offset, int value)
static void gpio_rcar_set_multiple(struct gpio_chip *chip, unsigned long *mask,
unsigned long *bits)
{
- struct gpio_rcar_priv *p = gpiochip_get_data(chip);
+ struct gpio_rcar_priv *p = gpio_to_priv(chip);
unsigned long flags;
u32 val, bankmask;
--
2.17.1
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* Re: [cip-dev] [PATCH 4.4.y-cip] gpio: rcar: Avoid NULL pointer access in gpio_rcar_set_multiple()
2020-09-04 7:40 [cip-dev] [PATCH 4.4.y-cip] gpio: rcar: Avoid NULL pointer access in gpio_rcar_set_multiple() Lad Prabhakar
@ 2020-09-09 7:02 ` Pavel Machek
0 siblings, 0 replies; 2+ messages in thread
From: Pavel Machek @ 2020-09-09 7:02 UTC (permalink / raw)
To: Lad Prabhakar; +Cc: cip-dev, Nobuhiro Iwamatsu, Pavel Machek, Biju Das
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Hi!
> gpiochip_get_data() expects the controller probe to call
> gpiochip_add_data() before using it, where as the rcar-gpio
> driver probe has gpiochip_add() call thus resulting in NULL
> pointer access.
>
> Avoid this case by using gpio_to_priv() call.
>
> Fixes: 6e52cced1aa58 ("gpio: rcar: Implement gpiochip.set_multiple()")
> Signed-off-by: Lad Prabhakar
Thanks, applied and pushed out.
Best regards,
Pavel
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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