On 30.04.2019 12:38, Cyrill Gorcunov wrote: > On Tue, Apr 30, 2019 at 12:09:57PM +0300, Kirill Tkhai wrote: >> >> This looks OK for me. >> >> But speaking about existing code it's a secret for me, why we ignore arg_lock >> in binfmt code, e.g. in load_elf_binary(). > > 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.
