On Tue, Apr 30, 2019 at 12:53:51PM +0300, Kirill Tkhai wrote: > > > > Well, strictly speaking we probably should but you know setup of > > the @arg_start by kernel's elf loader doesn't cause any side > > effects as far as I can tell (its been working this lockless > > way for years, mmap_sem is taken later in the loader code). > > Though for consistency sake we probably should set it up > > under the spinlock. > > Ok, so elf loader doesn't change these parameters. > Thanks for the explanation.
It setups these parameters unconditionally. I need to revisit this moment. Technically (if only I'm not missing something obvious) we might have a race here with prctl setting up new params, but this should be harmless since most of them (except stack setup) are purely informative data.
