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led: triggers: Fix a memory leak bug

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In led_trigger_set(), 'event' is allocated in kasprintf(). However, it is
not deallocated in the following execution if the label 'err_activate' or
'err_add_groups' is entered, leading to memory leaks. To fix this issue,
free 'event' before returning the error.

Fixes: 52c47742f7 ("leds: triggers: send uevent when changing triggers")
Signed-off-by: Wenwen Wang <[email protected]>
Acked-by: Pavel Machek <[email protected]>
Signed-off-by: Jacek Anaszewski <[email protected]>
This commit is contained in:
Wenwen Wang 2019-08-19 15:41:42 -05:00 • committed by Jacek Anaszewski
commit 60e2dde1e9
1 changed files with 1 additions and 0 deletions
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1
drivers/leds/led-triggers.c
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@ -173,6 +173,7 @@ err_activate:
list_del(&led_cdev->trig_list);
write_unlock_irqrestore(&led_cdev->trigger->leddev_list_lock, flags);
led_set_brightness(led_cdev, LED_OFF);
kfree(event);
return ret;
}