On Tue, Sep 18, 2012 at 03:32:04PM -0400, Ted Unangst wrote:
> On Tue, Sep 18, 2012 at 19:40, Alexey Suslikov wrote:
>
> > This one being discovered by Roman Kravchuk using Kannel port (see
> > https://github.com/jasperla/openbsd-wip/tree/master/net/kannel).
> >
> > While stress testing, Kannel components die with
> >
> > Program received signal SIGSEGV, Segmentation fault.
> > [Switching to thread 1006387]
> > 0x00000cb33345cf6e in random () at /usr/src/lib/libc/stdlib/random.c:387
> > 387 *fptr += *rptr;
> >
> > We suspect threading issue because of the following trace:
>
> > Is it normal to not have a mutex protected *random in OpenBSD?
>
> No, according to posix it should be thread safe. I don't know why,
> since rand() is one of the exempted functions, but random() is not.
> Standards gods are capricious gods.
I think you should stress *should* here. Looking at the
implementation, I cannot believe it's actually thread-safe.
-Otto
