From mboxrd@z Thu Jan  1 00:00:00 1970
From: SF Markus Elfring <elfring@users.sourceforge.net>
Subject: Re: net: xfrm: Deletion of an unnecessary check before the function
 call "ipcomp_free_tfms"
Date: Wed, 19 Nov 2014 10:51:31 +0100
Message-ID: <546C6823.50900@users.sourceforge.net>
References: <530C5E18.1020800@users.sourceforge.net> <alpine.DEB.2.10.1402251014170.2080@hadrien> <530CD2C4.4050903@users.sourceforge.net> <alpine.DEB.2.10.1402251840450.7035@hadrien> <530CF8FF.8080600@users.sourceforge.net> <alpine.DEB.2.02.1402252117150.2047@localhost6.localdomain6> <530DD06F.4090703@users.sourceforge.net> <alpine.DEB.2.02.1402262129250.2221@localhost6.localdomain6> <5317A59D.4@users.sourceforge.net> <546BAFF5.5020603@users.sourceforge.net> <20141119084542.GK4905@mwanda>
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Cc: "David S. Miller" <davem@davemloft.net>,
	Herbert Xu <herbert@gondor.apana.org.au>,
	Steffen Klassert <steffen.klassert@secunet.com>,
	netdev@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
	kernel-janitors@vger.kernel.org,
	Julia Lawall <julia.lawall@lip6.fr>
To: Dan Carpenter <dan.carpenter@oracle.com>
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>> The ipcomp_free_tfms() function tests whether its argument is NULL and then
>> returns immediately. Thus the test around the call is not needed.
> 
> It doesn't though...

You are right that this function implementation does a bit more before
returning because of a detected null pointer.
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/tree/net/xfrm/xfrm_ipcomp.c?id=394efd19d5fcae936261bd48e5b33b21897aacf8#n247

Can you agree that input parameter validation is also performed there?
Do you want that I resend my patch with a corrected commit message?

Regards,
Markus