Re: [syzbot] [kernel?] inconsistent lock state in ptrace_attach

[Oleg Nesterov]

On 11/17, Peter Zijlstra wrote:
>
> --- a/kernel/ptrace.c
> +++ b/kernel/ptrace.c
> @@ -461,7 +461,7 @@ static int ptrace_attach(struct task_str
>  				return retval;
>  		}
>
> -		scoped_guard (write_lock, &tasklist_lock) {
> +		scoped_guard (write_lock_irq, &tasklist_lock) {

FWIW,

Acked-by: Oleg Nesterov <oleg@xxxxxxxxxx>