Re: [PATCH 15/18] uprobes: wait for mmap_sem for write killable

[Oleg Nesterov]

On 02/29, Michal Hocko wrote:
>
> --- a/kernel/events/uprobes.c
> +++ b/kernel/events/uprobes.c
> @@ -1130,7 +1130,9 @@ static int xol_add_vma(struct mm_struct *mm, struct xol_area *area)
>  	struct vm_area_struct *vma;
>  	int ret;
>
> -	down_write(&mm->mmap_sem);
> +	if (down_write_killable(&mm->mmap_sem))
> +		return -EINTR;
> +

Yes, but then dup_xol_work() should probably check fatal_signal_pending() to
suppress uprobe_warn(), the warning looks like a kernel problem.

Oleg.