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

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Message-Id: <1418596940-24915-1-git-send-email-rickard_strandqvist@spectrumdigital.se>
Date:	Sun, 14 Dec 2014 23:42:20 +0100
From:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
To:	Forest Bond <forest@...ttletooquiet.net>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
	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>,
	Joe Perches <joe@...ches.com>, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] staging: vt6655: wmgr.c:  Fix for possible null pointer dereference

There is otherwise a risk of a possible null pointer dereference.

Was largely found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
---
 drivers/staging/vt6655/wmgr.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/vt6655/wmgr.c b/drivers/staging/vt6655/wmgr.c
index c73c39d..f98935c 100644
--- 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));
 
 	if ((pDevice == NULL) || (pbyBSSID == NULL) || (psRSNCapObj == NULL))
 		return false;
-- 
1.7.10.4

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