Re: UBSAN reports issue in ip_idents_reserve

[Eric Dumazet]

On Tue, 2016-09-20 at 07:18 -0700, Eric Dumazet wrote:

> +      */
> +     if (unlikely(atomic_cmpxchg(p_id, old, new) != old))
> +             new = prandom_u32();
> +     return new;

Looks like we should return new - segs;