Re: [PATCH] exit: use READ_ONCE() to read mm->owner

[Oleg Nesterov]

On 10/27, Mani Tofigh via B4 Relay wrote:
>
> --- a/kernel/exit.c
> +++ b/kernel/exit.c
> @@ -494,7 +494,7 @@ void mm_update_next_owner(struct mm_struct *mm)
>  	 * If the exiting or execing task is not the owner, it's
>  	 * someone else's problem.
>  	 */
> -	if (mm->owner != p)
> +	if (READ_ONCE(mm->owner) != p)

Acked-by: Oleg Nesterov <oleg@xxxxxxxxxx>