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 05ABAC433F5 for ; Tue, 9 Nov 2021 01:30:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E0CFD610A8 for ; Tue, 9 Nov 2021 01:30:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239039AbhKIBdD (ORCPT ); Mon, 8 Nov 2021 20:33:03 -0500 Received: from mail.kernel.org ([198.145.29.99]:50180 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244263AbhKIBZD (ORCPT ); Mon, 8 Nov 2021 20:25:03 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9C45E61B55; Tue, 9 Nov 2021 01:09:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1636420180; bh=Uex9h7YseuhlAs0JCsyeFQpH1/CR2LdViy8pLjB+99k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=f/VYxR3GHFL/brTjldyEouJHIOPiuR9xBh2Emnvadzl1laDNIz1Viq3A7JI4DFkkz AAiSF4YCZ743ZlRsP04NaVlgUnE3iIZDwHvYrtI+O8KsAvH9+pg2cIE7ghJJ7C2AD+ l8a9JYQOnTbsBn7oYp5pezSEZkRIxwriyYbT44ws0oN86iQjV4Z+Leb0SiuRQ54YlS 27AXWVROGexomBiZz/jTfzQKbanHTZA4so+k8xQU6o6KI3zBS5quyr0Xh/aGV6PwGE 6EOhtc8zoE7SJkCdZP6O3ab8zIcdYgasT/p5sCUJY+2dmi+wx1FjRvc3tWdFYyDbOH ewpOpkJQ3bOtA== 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 4.4 12/30] media: s5p-mfc: fix possible null-pointer dereference in s5p_mfc_probe() Date: Mon, 8 Nov 2021 20:09:00 -0500 Message-Id: <20211109010918.1192063-12-sashal@kernel.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211109010918.1192063-1-sashal@kernel.org> References: <20211109010918.1192063-1-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 7727789dbda14..daa5b4dea092c 100644 --- a/drivers/media/platform/s5p-mfc/s5p_mfc.c +++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c @@ -1102,7 +1102,7 @@ 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