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drm/nouveau/drm/nouveau/led: prevent a possible use-after-free 

If the led class registration fails, we free drm->led but do not reset
it to NULL, which means that the suspend/resume/fini function will act
as if everything went well in init() and will likely crash the kernel.

This patch adds the missing drm->led = NULL.

Reported-by: Emmanuel Pescosta <emmanuelpescosta099@gmail.com>
Signed-off-by: Martin Peres <martin.peres@free.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Martin Peres 2017-01-18 23:49:21 +02:00 committed by Ben Skeggs
parent 443828fd9e
commit ca33fafdc9
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/nouveau/nouveau_led.c
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@ -102,6 +102,7 @@ nouveau_led_init(struct drm_device *dev)
ret = led_classdev_register(dev->dev, &drm->led->led);
if (ret) {
kfree(drm->led);
drm->led = NULL;
return ret;
}