Re: Asterisk deadlocks since Kernel 4.1

[Stefan Priebe]

Hello Philipp,

Am 05.12.2015 um 15:19 schrieb Philipp Matthias Hahn:
> Hello Hannes,
>
> On Wed, Dec 02, 2015 at 12:40:32PM +0100, Hannes Frederic Sowa wrote:
> > > git bisect tells me it stopped working after those two commits were applied:
> > >
> > > commit d48623677191e0f035d7afd344f92cf880b01f8e
> > > Author: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
> > > Date:   Tue Sep 22 11:38:56 2015 +0800
> > >
> > >      netlink: Replace rhash_portid with bound
> > >
> > > commit 4e27762417669cb459971635be550eb7b5598286
> > > Author: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
> > > Date:   Fri Sep 18 19:16:50 2015 +0800
> > >
> > >      netlink: Fix autobind race condition that leads to zero port ID
> >
> > Cool, thanks a lot. Does this patch make a difference?
> >
> > diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
> > index 59651af..278e94c 100644
> > --- a/net/netlink/af_netlink.c
> > +++ b/net/netlink/af_netlink.c
> > @@ -1137,7 +1137,7 @@ static int netlink_insert(struct sock *sk, u32 portid)
> >
> >   	/* We need to ensure that the socket is hashed and visible. */
> >   	smp_wmb();
> > -	nlk_sk(sk)->bound = portid;
> > +	nlk_sk(sk)->bound = true;
> >
> >   err:
> >   	release_sock(sk);
>
> Didn't help, test program still gets stuck; sorry :-(

Can you please try this patch on top of 4.1.13 (which helps me):
http://pastebin.com/raw.php?i=hiuq4bsW

Stefan

> Philipp
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