Re: [PATCH v2 6/7] Split remaining calls tocall_usermodehelper_fns()

[Oleg Nesterov]

On 03/08, Lucas De Marchi wrote:
>
> @@ -571,9 +572,17 @@ void do_coredump(siginfo_t *siginfo)
>  			goto fail_dropcount;
>  		}
>
> -		retval = call_usermodehelper_fns(helper_argv[0], helper_argv,
> -					NULL, UMH_WAIT_EXEC, umh_pipe_setup,
> -					NULL, &cprm);
> +		sub_info = call_usermodehelper_setup(helper_argv[0],
> +						helper_argv, NULL, GFP_KERNEL,
> +						umh_pipe_setup, NULL, &cprm);
> +		if (!sub_info) {
> +			printk(KERN_WARNING "%s failed to allocate memory\n",
> +			       __func__);

Why?

> +			argv_free(helper_argv);
> +			goto fail_dropcount;
> +		}
> +
> +		retval = call_usermodehelper_exec(sub_info, UMH_WAIT_EXEC);

I do not really like another argv_free() here... How about

		retval = -ENOMEM;
		info = call_usermodehelper_setup(...);
		if (info)
			retval = call_usermodehelper_fns(...);
		argv_free();

?

Oleg.

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