netdev - Re: Glibc recvmsg from kernel netlink socket hangs forever

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Message-ID: <20150925045853.GA5286@gondor.apana.org.au>
Date:	Fri, 25 Sep 2015 12:58:53 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	Steven Schlansker <stevenschlansker@...il.com>,
	linux-kernel@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>,
	netdev@...r.kernel.org
Subject: Re: Glibc recvmsg from kernel netlink socket hangs forever

On Thu, Sep 24, 2015 at 09:36:53PM -0700, Guenter Roeck wrote:
>
> http://comments.gmane.org/gmane.linux.network/363085
> 
> might explain your problem.
> 
> I thought this was resolved in 4.1, but it looks like the problem still persists
> there. At least I have reports from my workplace that 4.1.6 and 4.1.7 are still
> affected. I don't know if there have been any relevant changes in 4.2.
> 
> Copying Herbert and Eric for additional input.

There was a separate bug discovered by Tejun recently.  You need
to apply the patches

https://patchwork.ozlabs.org/patch/519245/
https://patchwork.ozlabs.org/patch/520824/

There is another follow-up but it shouldn't make any difference
in practice.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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