linux-kernel - Re: netlink: Add netlink_bound helper and use it in netlink

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Message-ID: <20150926195548.GA19064@gondor.apana.org.au>
Date:	Sun, 27 Sep 2015 03:55:48 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Tejun Heo <tj@...nel.org>
Cc:	David Miller <davem@...emloft.net>, cwang@...pensource.com,
	tom@...bertland.com, kafai@...com, kernel-team@...com,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	torvalds@...ux-foundation.org, jiri@...nulli.us,
	nicolas.dichtel@...nd.com, tgraf@...g.ch, sfeldma@...il.com
Subject: Re: netlink: Add netlink_bound helper and use it in netlink_getname

On Sat, Sep 26, 2015 at 03:52:45PM -0400, Tejun Heo wrote:
> 
> Ah, yeah, you're right.  We need to check that there because it may
> contain a garbage value.  I still think it'd better to use
> netlink_bound() test in connect() too tho.

Well I disagree.  When I say that it returns to user-space I really
mean that the next time we use portid via the same call path that
triggered the connect we must be checking nlk->bound anyway.

Good luck finding more bugs in this code :)

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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