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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E919CC433EF for ; Wed, 24 Nov 2021 12:14:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242901AbhKXMRP (ORCPT ); Wed, 24 Nov 2021 07:17:15 -0500 Received: from mail.kernel.org ([198.145.29.99]:47096 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243716AbhKXMPP (ORCPT ); Wed, 24 Nov 2021 07:15:15 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id C0839610F9; Wed, 24 Nov 2021 12:10:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1637755811; bh=dTg/yNAUnvDS1H7l1tqqToSBagvSeQxGASeVqlgRDO0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VokHjmlhk3dOTBfSIicQUmYsCcwdHo2dL5H6ms4con+FC+gfKPUqCYthR76oo3lwY 5M274T7gbzYHMEkjHi+fS+yVhBvzJA/mwBPwcWNIeulFRSUGcxPlpwd7m+/WMsYz2q pg2hss4UEqQgMZ9MZuDYVxwvmULjcpiQi2sQVRj8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, TOTE Robot , Tuo Li , Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 4.9 067/207] media: s5p-mfc: fix possible null-pointer dereference in s5p_mfc_probe() Date: Wed, 24 Nov 2021 12:55:38 +0100 Message-Id: <20211124115706.095187944@linuxfoundation.org> X-Mailer: git-send-email 2.34.0 In-Reply-To: <20211124115703.941380739@linuxfoundation.org> References: <20211124115703.941380739@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@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