[PATCH V4] notifier/panic: Introduce panic_notifier_filter

[d.hatayama at fujitsu.com]

> @@ -146,6 +157,34 @@ void nmi_panic(struct pt_regs *regs, const char *msg)
>  }
>  EXPORT_SYMBOL(nmi_panic);
> 
> +static int __init panic_notifier_filter_setup(char *buf)
> +{
> +       char *func;
> +       unsigned long addr;
> +
> +       while ((func = strsep(&buf, ","))) {
> +               addr = kallsyms_lookup_name(func);
> +               if (!addr) {
> +                       pr_warn("panic_notifier_filter: invalid symbol %s\n", func);
> +                       continue;
> +               }

Could you remove this check?

panic_notifier_list is exported to kernel modules and this check
prevents such users from using this feature.

Thanks.
HATAYAMA, Daisuke