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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C84B7C43217 for ; Tue, 9 Nov 2021 01:23:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B5150610A2 for ; Tue, 9 Nov 2021 01:23:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242914AbhKIB0a (ORCPT ); Mon, 8 Nov 2021 20:26:30 -0500 Received: from mail.kernel.org ([198.145.29.99]:46222 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241808AbhKIBVe (ORCPT ); Mon, 8 Nov 2021 20:21:34 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 3B4F461B2C; Tue, 9 Nov 2021 01:08:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1636420111; bh=dTg/yNAUnvDS1H7l1tqqToSBagvSeQxGASeVqlgRDO0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mAjQPMsk8H2avLWwKYTuZPe+dLlV49jiSmR4Kl2bEgl/fYgG5e1S84Wrztxx5AZpi kCB+mJFjG5DuI5NeL32BNI/qy20sJ4XUCwM1il6rVezltLzW+zoy43XPtEUus5UrVe 8+2f98dlf0dbpugiCshSLFdko9qX9MsCrqdfF5nKb9gdMhRlR/4U3Zhh982u21l5ns RBkBf2IbuEoBsyBsST2ifPD8bqNPQ80BVlhghQwiSyjJALrYfn4tK8NfdaxT0RoEOP GJ3KCqnrROCCpzweggL6NM6A2f3Y4MIFwiqa6GcEEH2mu/m11niq0HjQOgXMm339z7 nsaYCpWjhnDSw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Tuo Li , TOTE Robot , Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin , a.hajda@samsung.com, mchehab@kernel.org, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 13/33] media: s5p-mfc: fix possible null-pointer dereference in s5p_mfc_probe() Date: Mon, 8 Nov 2021 20:07:47 -0500 Message-Id: <20211109010807.1191567-13-sashal@kernel.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211109010807.1191567-1-sashal@kernel.org> References: <20211109010807.1191567-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tuo Li [ Upstream commit 8515965e5e33f4feb56134348c95953f3eadfb26 ] The variable pdev is assigned to dev->plat_dev, and dev->plat_dev is checked in: if (!dev->plat_dev) This indicates both dev->plat_dev and pdev can be NULL. If so, the function dev_err() is called to print error information. dev_err(&pdev->dev, "No platform data specified\n"); However, &pdev->dev is an illegal address, and it is dereferenced in dev_err(). To fix this possible null-pointer dereference, replace dev_err() with mfc_err(). Reported-by: TOTE Robot Signed-off-by: Tuo Li Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/platform/s5p-mfc/s5p_mfc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c b/drivers/media/platform/s5p-mfc/s5p_mfc.c index 8051c13456922..0ff972b8d9671 100644 --- a/drivers/media/platform/s5p-mfc/s5p_mfc.c +++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c @@ -1160,7 +1160,7 @@ static int s5p_mfc_probe(struct platform_device *pdev) spin_lock_init(&dev->condlock); dev->plat_dev = pdev; if (!dev->plat_dev) { - dev_err(&pdev->dev, "No platform data specified\n"); + mfc_err("No platform data specified\n"); return -ENODEV; } -- 2.33.0