linux-kernel - Re: Strange PF_NETLINK NETLINK_ROUTE stall: netlink: Fix autobind race condition that leads to zero port ID

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Message-ID: <20151205141639.GA31897@pmhahn.de>
Date:	Sat, 5 Dec 2015 15:16:39 +0100
From:	Philipp Matthias Hahn <pmhahn@...ahn.de>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	linux-kernel@...r.kernel.org, Tejun Heo <tj@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: Strange PF_NETLINK NETLINK_ROUTE stall: netlink: Fix autobind
 race condition that leads to zero port ID

Hello,

On Sat, Dec 05, 2015 at 09:10:08AM +0800, Herbert Xu wrote:
> On Fri, Nov 27, 2015 at 04:23:54PM +0100, Philipp Hahn wrote:
> > 
> > I observed a strange stall in a multi-threaded process (originally
> > OpenLDAP slapd), which stalls during a call to getaddrinfo() after
> > upgrading the kernel from 3.16.x to 4.1.12:
> 
> Can you try to see if the latest kernel still has this problem.
> Unfortunately a number of fixes seem to not have made it into
> 4.1 so anything could happen there.

I also tried 4.1.13, if that is what you mean with latest; it also
hangs.

> Thanks,

Thanks go to you.

Philipp
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