Re: [PATCH] ipc,sem block sem_lock on sma->lock during sma initialization

[Manfred Spraul <manfred@colorfullife.com>]

Hi Rik,

good catch - I completely forgot to check the initialization

On 11/22/2014 04:40 AM, Rik van Riel wrote:
>
> newary initializes a bunch of things after the call to
> ipc_addid, however some things are initialized inside
> ipc_addid as well
>
> Looking closer at newary, I suppose that it should be
> possible to move those other initializations before
> the call to ipc_addid.  That would likely get rid of
> the problem, too.
>
> However, I also see this line in newary, and I have
> no idea what protects that data:
>
>          ns->used_sems += nsems;
It should be sem_ids.rwsem, and at least according to the documentation 
both freeary() and newary() hold it.


--
     Manfred