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Re: [RFC PATCH v4 2/6] module: preserve Elf information for livepatch modules

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  Re: [RFC PATCH v4 2/6] module: preserve Elf information for  livepatch modules Petr Mladek <pmladek@suse.com> - 2016-02-10 17:00 +0100

#1331285 — Re: [RFC PATCH v4 2/6] module: preserve Elf information for livepatch modules

On Wed 2016-02-03 20:11:07, Jessica Yu wrote:
> diff --git a/kernel/module.c b/kernel/module.c
> index 71c77ed..9c16eb2 100644
> --- a/kernel/module.c
> +++ b/kernel/module.c
> @@ -2676,6 +2764,23 @@ static int copy_module_from_user(const void __user *umod, unsigned long len,
>  	return 0;
>  }
>  
> +#ifdef CONFIG_LIVEPATCH
> +static int find_livepatch_modinfo(struct module *mod, struct load_info *info)
> +{
> +	mod->klp = get_modinfo(info, "livepatch") ? true : false;
> +
> +	return 0;
> +}
> +#else /* !CONFIG_LIVEPATCH */
> +static int find_livepatch_modinfo(struct module *mod, struct load_info *info)
> +{
> +	if (get_modinfo(info, "livepatch"))

One more thing. I suggest to write a friendly message here. For example:

	pr_err("LifePatch support is not available. Rejecting the module: s\n",
	       mod->name);

It might safe some debugging a poor user or developer.

> +		return -ENOEXEC;
> +
> +	return 0;
> +}
> +#endif /* CONFIG_LIVEPATCH */
> +

Best Regards,
Petr

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