staging: greybus: fix a missing-check bug in gb_lights_light_config()

In gb_lights_light_config(), 'light->name' is allocated by kstrndup().
It returns NULL when fails, add check for it.

Signed-off-by: Chen Zhou <chenzhou10@huawei.com>
Acked-by: Rui Miguel Silva <rmfrfs@gmail.com>
Link: https://lore.kernel.org/r/20200401030017.100274-1-chenzhou10@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/greybus/light.c b/drivers/staging/greybus/light.c
index d6ba25f..d2672b6 100644 (file)
--- a/drivers/staging/greybus/light.c
+++ b/drivers/staging/greybus/light.c
@@ -1026,7 +1026,8 @@ static int gb_lights_light_config(struct gb_lights *glights, u8 id)
 
        light->channels_count = conf.channel_count;
        light->name = kstrndup(conf.name, NAMES_MAX, GFP_KERNEL);
-
+       if (!light->name)
+               return -ENOMEM;
        light->channels = kcalloc(light->channels_count,
                                  sizeof(struct gb_channel), GFP_KERNEL);
        if (!light->channels)