linux-kernel - Re: [PATCH] staging: vt6655: wmgr.c: Fix for possible null pointer dereference

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Date:	Sun, 14 Dec 2014 14:52:44 -0800
From:	Joe Perches <joe@...ches.com>
To:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
Cc:	Forest Bond <forest@...ttletooquiet.net>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Malcolm Priestley <tvboxspy@...il.com>,
	Guillaume Clement <gclement@...bob.org>,
	Guido Martínez <guido@...guardiasur.com.ar>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Himangi Saraogi <himangi774@...il.com>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: vt6655: wmgr.c:  Fix for possible null pointer
 dereference

On Sun, 2014-12-14 at 23:42 +0100, Rickard Strandqvist wrote:
> There is otherwise a risk of a possible null pointer dereference.
> Was largely found by using a static code analysis program called cppcheck.
[]
> diff --git a/drivers/staging/vt6655/wmgr.c b/drivers/staging/vt6655/wmgr.c
[]
> @@ -4391,7 +4391,7 @@ bAdd_PMKID_Candidate(
>  	unsigned int ii = 0;
>  
>  	pr_debug("bAdd_PMKID_Candidate START: (%d)\n",
> -		 (int)pDevice->gsPMKIDCandidate.NumCandidates);
> +		(int)(pDevice ? pDevice->gsPMKIDCandidate.NumCandidates : 0));

This is a function tracing printk.
I think it's better to just remove it.



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