Re: [PATCH v3 1/3] ptrace,syscall_user_dispatch: Implement Syscall User Dispatch Suspension

[Oleg Nesterov <oleg@xxxxxxxxxx>]

Hi Gregory,

I'll try to read this series next Monday, I need to recall what does
syscall-user-dispatch actually do ;)

just one question for now,

On 01/20, Gregory Price wrote:
>
> --- a/kernel/ptrace.c
> +++ b/kernel/ptrace.c
> @@ -370,6 +370,10 @@ static int check_ptrace_options(unsigned long data)
>  	if (data & ~(unsigned long)PTRACE_O_MASK)
>  		return -EINVAL;
>  
> +	if (unlikely(data & PTRACE_O_SUSPEND_SYSCALL_USER_DISPATCH) &&
> +	    (!IS_ENABLED(CONFIG_CHECKPOINT_RESTART)))
> +			return -EINVAL;

Hmm? git grep CHECKPOINT_RESTART shows nothing.

Oleg.