[PATCH][RFC] fs/exec.c: provide the correct process pid to the pipe helper

[Oleg Nesterov]

On 09/16, Will Drewry wrote:
>
> --- a/fs/exec.c
> +++ b/fs/exec.c
> @@ -1467,6 +1467,13 @@ static int format_corename(char *corename, long signr)
>  	char *const out_end = corename + CORENAME_MAX_SIZE;
>  	int rc;
>  	int pid_in_pattern = 0;
> +	pid_t pid = task_tgid_vnr(current);
> +
> +	/* The pipe helper runs in the init namespace and should
> +	 * receive the matching pid until that changes.
> +	 */
> +	if (ispipe)
> +		pid = task_tgid_nr(current);

Agreed, it doesn't make sense to pass the "local" pid to the init ns.

Oleg.