Re: [PATCH] arm64: hw_breakpoint: Save privilege of access control via ptrace

Oleg Nesterov
2024-06-19T15:17:06Z

I don't understand what this patch does, but...

On 06/18, Tiezhu Yang wrote:
>
> --- a/include/uapi/linux/perf_event.h
> +++ b/include/uapi/linux/perf_event.h
> @@ -467,6 +467,7 @@ struct perf_event_attr {
> __u32 wakeup_watermark; /* bytes before wakeup */
> };
>
> + __u8 bp_priv;
> __u32 bp_type;

Is it safe to add the new member in the middle of uapi struct?
This will break userspace...

Oleg.