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Date: Mon, 10 Jul 2017 18:05:32 +0800 From: Herbert Xu <herbert@...dor.apana.org.au> To: David Miller <davem@...emloft.net> Cc: sowmini.varadhan@...cle.com, torvalds@...ux-foundation.org, akpm@...ux-foundation.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [GIT] Networking On Sun, Jul 09, 2017 at 09:40:43PM +0100, David Miller wrote: > > > It look like PF_ALG sets up a ->sk in alg_create() (but this > > would get over-written in alg_accept()?) No it does not. The struct socket comes from sys_accept() and AFAICS it doesn't carry a struck sock with it. > > Cc'ing Herbert to see if this is expected behavior (and PF_ALG > > somehow does the right thing with the refcount for the ->sk > > set up in alg_create) in which case I suppose we should drop the > > WARN_ON. > > I think we've found yet another socket leak, this time in > AF_ALG. Hmm, I can't see the problem in af_alg_accept. The struct socket comes directly from sys_accept() which creates it using sock_alloc. So the only thing I can think of is that the memory returned by sock_alloc is not zeroed and therefore the WARN_ON is just reading garbage. 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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