From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934351AbdA0L2u (ORCPT ); Fri, 27 Jan 2017 06:28:50 -0500 Received: from mailout1.samsung.com ([203.254.224.24]:47033 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934316AbdA0L2n (ORCPT ); Fri, 27 Jan 2017 06:28:43 -0500 X-AuditID: b6c32a17-f794a6d0000012f0-de-588b2e63afaa From: Shailendra Verma To: Dan Williams , Vinod Koul , dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, p.shailesh@samsung.com, ashish.kalra@samsung.com, Shailendra Verma , Shailendra Verma Subject: [PATCH] Dma - Fix possible NULL derefrence. Date: Fri, 27 Jan 2017 16:55:59 +0530 Message-id: <1485516359-4232-1-git-send-email-shailendra.v@samsung.com> X-Mailer: git-send-email 1.7.9.5 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrOIsWRmVeSWpSXmKPExsWy7bCmmG6yXneEwZJuEYv7076xW0yfeoHR YvXUv6wWl3fNYbPYMaWVxeLWvJlsFou+vWK2eNm3n8WBw2PnrLvsHov3vGTy6NuyitHj8ya5 AJYoLpuU1JzMstQifbsErox1Sz6wFdxhrXh6aDN7A+Mlli5GTg4JAROJbadOsELYYhIX7q1n 62Lk4hASWMoocWrPFEYI5zOjxPulu5lhOla0d0FVrWSUmP1gHjtIgk3AUOJ1318mkISIwEIm iVdX7zCBJISBOs6+awfrZhFQldg0eTvYbl4Bd4kNG/uAbA6gqQoScybZgPRKCOxhk7j35g5U XFZi0wGoxS4Sc1ouQJ0qLPHq+BZ2CFtKoun2KRaI3mOMEo+fL2aCcC4zSmw5vQyqyl7i2q3X YDazAJ/E4vUP2CAW8Ep0tAlBlHhIvJ/5GmqBo8TzTZcYQWwhgViJZ3uusU1glFzAyLCKUSy1 oDg3PbXYuMBSrzgxt7g0L10vOT93EyM4+rTEdzCuWOF1iFGAg1GJh/fGra4IIdbEsuLK3EOM EhzMSiK8G3W7I4R4UxIrq1KL8uOLSnNSiw8xSnOwKInzXqy2jhASSE8sSc1OTS1ILYLJMnFw SjUwZmnddzp88O+VK6oti503bj+4R6yKt9uQLyXOtcKzum2hqYzNsn3sP56kbd74ZV66Vf9S xVNuKSW2PdnZIgI6e+bz8F4okL+1Lz3v4sctwb9Z4yIPSJ2Kmliw4Ni2+cI7t+8LsHvWYmlw Jt6Lv+OzpvHVBwWXQnMiZmypFGGdkiKz6d8HFdd1SizFGYmGWsxFxYkA+TltQ7oCAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrFLMWRmVeSWpSXmKPExsWSnbNCVTdJrzvC4N0fXov7076xW0yfeoHR YvXUv6wWl3fNYbPYMaWVxeLWvJlsFou+vWK2eNm3n8WBw2PnrLvsHov3vGTy6NuyitHj8ya5 AJYoN5uM1MSU1CKF1Lzk/JTMvHRbpdAQN10LJYW8xNxUW6UIXd+QICWFssScUiDPyAANODgH uAcr6dsluGWsW/KBreAOa8XTQ5vZGxgvsXQxcnJICJhIrGjvYoOwxSQu3FsPZHNxCAksZ5S4 e+A1WIJNwFDidd9fJpCEiMByJonD++4wgySEgbrPvmsHs1kEVCU2Td4ONpVXwF1iw8Y+IJsD aKqCxJxJNhMYORcwMqxiFEstKM5Nzy0uMDDWK07MLS7NS9dLzs/dxAgMt22HlSR2MC5Y4XWI UYCDUYmH98P7rggh1sSy4srcQ4wSHMxKIry6Yt0RQrwpiZVVqUX58UWlOanFhxhNgbZPZJYS Tc4HxkJeSbyhiamFhYWJpbGxsYWJkjhv7PRn4UIC6YklqdmpqQWpRTB9TBycUg2MJVxlUeet LZp3rv+aWeh4cPLdQiH7Qr05W//1d7xZofPrk1a4WdjyoqNrY/qUUp/d+LKqc//ECVwp304G C1sGei9yKwhZH3nz7R6mOUVW/2ovSR2y7DLXuvBISPLs8e0RLOunryuaGyQ920Dxx37jjJpL Fv9vThbbfFDl6Pplkpx7Yl1OzhH/rcRSnJFoqMVcVJwIAJqMMtJNAgAA X-MTR: 20000000000000000@CPGS X-CMS-MailID: 20170127112626epcas3p137caa1e5fdbf0bb07ae5f057bf819828 X-Msg-Generator: CA X-Sender-IP: 182.195.34.24 X-Local-Sender: =?UTF-8?B?U2hhaWxlbmRyYSBWZXJtYRtTUkktTm9pZGEtQ29tbWVyY2lh?= =?UTF-8?B?bCBSJkQgIFN5c3RlbSBTL1cgR3JvdXAb7IK87ISx7KCE7J6QG0xlYWQgRW5n?= =?UTF-8?B?aW5lZXIvQ29ycG9yYXRlIEVuZ2luZWVy?= X-Global-Sender: =?UTF-8?B?U2hhaWxlbmRyYSBWZXJtYRtTUkktTm9pZGEtQ29tbWVyY2lh?= =?UTF-8?B?bCBSJkQgIFN5c3RlbSBTL1cgR3JvdXAbU2Ftc3VuZyBFbGVjdHJvbmljcxtM?= =?UTF-8?B?ZWFkIEVuZ2luZWVyL0NvcnBvcmF0ZSBFbmdpbmVlcg==?= X-Sender-Code: =?UTF-8?B?QzEwG1NXQUhRG0MxMElaMDFJWjAxODEyMA==?= CMS-TYPE: 103P X-HopCount: 7 X-CMS-RootMailID: 20170127112626epcas3p137caa1e5fdbf0bb07ae5f057bf819828 X-RootMTR: 20170127112626epcas3p137caa1e5fdbf0bb07ae5f057bf819828 References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org of_match_device could return NULL, and so cause a NULL pointer dereference later. Signed-off-by: Shailendra Verma --- drivers/dma/mv_xor.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c index 23f7528..c25b3bb 100644 --- a/drivers/dma/mv_xor.c +++ b/drivers/dma/mv_xor.c @@ -1323,7 +1323,10 @@ static int mv_xor_probe(struct platform_device *pdev) const struct of_device_id *of_id = of_match_device(mv_xor_dt_ids, &pdev->dev); + if (!of_id) { + dev_err(&pdev->dev, "Error: No device match found\n"); + return -ENODEV; + } xordev->xor_type = (uintptr_t)of_id->data; } -- 1.7.9.5