On Wed, 17 Aug 2016, Peter Wang wrote:

> I have traced the problem to this line in nss_create_object():
>
> slot = PK11_FindSlotByName(slot_name);
>
> If I serialise the call then the error does not (seem to) occur,
> e.g. arbitrarily using nss_crllock:
>
> PR_Lock(nss_crllock);
> slot = PK11_FindSlotByName(slot_name);
> PR_Unlock(nss_crllock);

What an excellent and highly detailed report, thanks!

There's no docs for that NSS function available (sigh) but I took a look at
the code:

   http://searchfox.org/nss/source/lib/pk11wrap/pk11slot.c#585

To me, it looks like there is locking done already and that it therefore
shouldn't have a threading problem! Not exactly sure how to proceed from
this...

-- 
  / daniel.haxx.se
-------------------------------------------------------------------
List admin: https://cool.haxx.se/list/listinfo/curl-library
Etiquette:  https://curl.haxx.se/mail/etiquette.html