Re: [PATCH v2 0/4] futex: Drop ROBUST_LIST_LIMIT

[Florian Weimer]

* André Almeida:

> As requested by Peter at [1], this patchset drops the
> ROBUST_LIST_LIMIT. This is achieve by simply rewriting the processed
> list element ->next to point to the head->list address, destroying the
> linked list to avoid any circular list.

Doesn't this turn a robust mutex overwrite or a TCB overwrite into a
write-anything-anywhere primitive?  Furthermore, I'm not entirely sure
if this is entirely backwards-compatible.

Could you use the tortoise/hare approach instead?

Thanks,
Florian