From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5D15AC282C8 for ; Mon, 28 Jan 2019 17:46:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2271D20881 for ; Mon, 28 Jan 2019 17:46:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548697582; bh=lEX+ia60M3djuw6C16E24APAvdXawfM5EyjrBZYoZK0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Jd0MTCBL5xNkvUc35ebcj9iTCCmmpI4Q4IxfN27lY2eDEeGJt/iZJvRF/3rlK3Qve fW4JliolyyCJwUYfc1mUBDMRvE7gZBYL8+dVlTO6aryPY3d2S2dgjrwDdKoEja9LMi lsE6gqgcLQznsIv7Hf/61gI/G3oxh6Uh2B1xywL0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728233AbfA1PrQ (ORCPT ); Mon, 28 Jan 2019 10:47:16 -0500 Received: from mail.kernel.org ([198.145.29.99]:60672 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728256AbfA1PrO (ORCPT ); Mon, 28 Jan 2019 10:47:14 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3774121741; Mon, 28 Jan 2019 15:47:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548690433; bh=lEX+ia60M3djuw6C16E24APAvdXawfM5EyjrBZYoZK0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sRzptUX07mnAkOBnKO7o9la7UCpYZyRgNFdLoWaCd7INN5T9Is3DVTbbn5jevEgkl GIx7/sSA4+zOoAh6JkYywt2G98FVe2DYtTobQ9pVyPWJW3oC6mBfnUnC0l/Ulodmzq eB1vI8Mxoq2we+SrWphgXUTur2ii4uK5am5+BVv8= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Michael Straube , Greg Kroah-Hartman , Sasha Levin , devel@driverdev.osuosl.org Subject: [PATCH AUTOSEL 4.20 084/304] staging: pi433: fix potential null dereference Date: Mon, 28 Jan 2019 10:40:01 -0500 Message-Id: <20190128154341.47195-84-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190128154341.47195-1-sashal@kernel.org> References: <20190128154341.47195-1-sashal@kernel.org> MIME-Version: 1.0 X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Michael Straube [ Upstream commit 64c4c4ca6c129a4191e8e1e91b2d5d9b8d08c518 ] Add a test for successful call to cdev_alloc() to avoid potential null dereference. Issue reported by smatch. Signed-off-by: Michael Straube Fixes: 874bcba65f9a ("staging: pi433: New driver") Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/staging/pi433/pi433_if.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/staging/pi433/pi433_if.c b/drivers/staging/pi433/pi433_if.c index c85a805a1243..a497ec197872 100644 --- a/drivers/staging/pi433/pi433_if.c +++ b/drivers/staging/pi433/pi433_if.c @@ -1255,6 +1255,10 @@ static int pi433_probe(struct spi_device *spi) /* create cdev */ device->cdev = cdev_alloc(); + if (!device->cdev) { + dev_dbg(device->dev, "allocation of cdev failed"); + goto cdev_failed; + } device->cdev->owner = THIS_MODULE; cdev_init(device->cdev, &pi433_fops); retval = cdev_add(device->cdev, device->devt, 1); -- 2.19.1