On Fri, 04 Jan 2013 17:29:11 +0900
Jingoo Han <jg1.han@xxxxxxxxxxx> wrote:
> NULL deference of name is checked when device is registered.
> If the name is null, it will cause a kernel oops in dev_set_name().
>
> ...
>
> --- a/drivers/video/backlight/backlight.c
> +++ b/drivers/video/backlight/backlight.c
> @@ -292,6 +292,11 @@ struct backlight_device *backlight_device_register(const char *name,
> struct backlight_device *new_bd;
> int rc;
>
> + if (name == NULL) {
> + pr_err("backlight name is null\n");
> + return ERR_PTR(-EINVAL);
> + }
> +
> pr_debug("backlight_device_register: name=%s\n", name);
I don't understand this.
Is there some driver which is calling these functions with name=NULL?
If so, which one(s)?
If "no" then why don't we declare that "passing name=NULL is a bug" and
leave the code as-is?
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