* [PATCH] led: triggers: Fix dereferencing of null pointer
@ 2019-09-03 21:18 Oleh Kravchenko
2019-09-05 20:37 ` Jacek Anaszewski
0 siblings, 1 reply; 2+ messages in thread
From: Oleh Kravchenko @ 2019-09-03 21:18 UTC (permalink / raw)
To: linux-leds; +Cc: Oleh Kravchenko
Error was detected by PVS-Studio:
V522 Dereferencing of the null pointer 'led_cdev->trigger' might take place.
Signed-off-by: Oleh Kravchenko <oleg@kaa.org.ua>
---
drivers/leds/led-triggers.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c
index eff1bda8b520..23963e5cb5d6 100644
--- a/drivers/leds/led-triggers.c
+++ b/drivers/leds/led-triggers.c
@@ -167,11 +167,11 @@ int led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trig)
trig->deactivate(led_cdev);
err_activate:
- led_cdev->trigger = NULL;
- led_cdev->trigger_data = NULL;
write_lock_irqsave(&led_cdev->trigger->leddev_list_lock, flags);
list_del(&led_cdev->trig_list);
write_unlock_irqrestore(&led_cdev->trigger->leddev_list_lock, flags);
+ led_cdev->trigger = NULL;
+ led_cdev->trigger_data = NULL;
led_set_brightness(led_cdev, LED_OFF);
kfree(event);
--
2.21.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] led: triggers: Fix dereferencing of null pointer
2019-09-03 21:18 [PATCH] led: triggers: Fix dereferencing of null pointer Oleh Kravchenko
@ 2019-09-05 20:37 ` Jacek Anaszewski
0 siblings, 0 replies; 2+ messages in thread
From: Jacek Anaszewski @ 2019-09-05 20:37 UTC (permalink / raw)
To: Oleh Kravchenko, linux-leds
Hi Oleh,
Thank you for the patch
On 9/3/19 11:18 PM, Oleh Kravchenko wrote:
> Error was detected by PVS-Studio:
> V522 Dereferencing of the null pointer 'led_cdev->trigger' might take place.
>
> Signed-off-by: Oleh Kravchenko <oleg@kaa.org.ua>
> ---
> drivers/leds/led-triggers.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c
> index eff1bda8b520..23963e5cb5d6 100644
> --- a/drivers/leds/led-triggers.c
> +++ b/drivers/leds/led-triggers.c
> @@ -167,11 +167,11 @@ int led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trig)
> trig->deactivate(led_cdev);
> err_activate:
>
> - led_cdev->trigger = NULL;
> - led_cdev->trigger_data = NULL;
> write_lock_irqsave(&led_cdev->trigger->leddev_list_lock, flags);
> list_del(&led_cdev->trig_list);
> write_unlock_irqrestore(&led_cdev->trigger->leddev_list_lock, flags);
> + led_cdev->trigger = NULL;
> + led_cdev->trigger_data = NULL;
> led_set_brightness(led_cdev, LED_OFF);
> kfree(event);
>
>
Added tag:
Fixes: 2282e125a406 ("leds: triggers: let struct led_trigger::activate()
return an error code")
and applied.
--
Best regards,
Jacek Anaszewski
^ permalink raw reply [flat|nested] 2+ messages in thread
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2019-09-05 20:37 ` Jacek Anaszewski
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