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 2C40DC433F5 for ; Mon, 18 Oct 2021 14:00:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0DF5A60F25 for ; Mon, 18 Oct 2021 14:00:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233664AbhJROCm (ORCPT ); Mon, 18 Oct 2021 10:02:42 -0400 Received: from mail.kernel.org ([198.145.29.99]:38242 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234544AbhJROAa (ORCPT ); Mon, 18 Oct 2021 10:00:30 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id B5E586058D; Mon, 18 Oct 2021 13:42:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1634564539; bh=RnTKsBJzNHDVtnKE56ENXLz4MomONE8g6IMKWUNhBgY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gtLnfIoLbCOuS2OYXqTomJeZc2nbQ4cWb9RIXWflfoDKKywx/uJZLltqN6YofBRtw jek+WSFUAbeszHxv658efarb/4yGZM7nUX4YIdmlJzpy3fHXT1L6ZWga6C8zNhOxgU 8wu322hPrlTZsO7J3e8eXha79eUDzgbnZWeU76fI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Colin Ian King , Dmitry Baryshkov , Rob Clark Subject: [PATCH 5.14 127/151] drm/msm: Fix null pointer dereference on pointer edp Date: Mon, 18 Oct 2021 15:25:06 +0200 Message-Id: <20211018132344.799716412@linuxfoundation.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211018132340.682786018@linuxfoundation.org> References: <20211018132340.682786018@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: linux-kernel@vger.kernel.org From: Colin Ian King commit 2133c4fc8e1348dcb752f267a143fe2254613b34 upstream. The initialization of pointer dev dereferences pointer edp before edp is null checked, so there is a potential null pointer deference issue. Fix this by only dereferencing edp after edp has been null checked. Addresses-Coverity: ("Dereference before null check") Fixes: ab5b0107ccf3 ("drm/msm: Initial add eDP support in msm drm driver (v5)") Signed-off-by: Colin Ian King Reviewed-by: Dmitry Baryshkov Link: https://lore.kernel.org/r/20210929121857.213922-1-colin.king@canonical.com Signed-off-by: Rob Clark Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/msm/edp/edp_ctrl.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/msm/edp/edp_ctrl.c +++ b/drivers/gpu/drm/msm/edp/edp_ctrl.c @@ -1116,7 +1116,7 @@ void msm_edp_ctrl_power(struct edp_ctrl int msm_edp_ctrl_init(struct msm_edp *edp) { struct edp_ctrl *ctrl = NULL; - struct device *dev = &edp->pdev->dev; + struct device *dev; int ret; if (!edp) { @@ -1124,6 +1124,7 @@ int msm_edp_ctrl_init(struct msm_edp *ed return -EINVAL; } + dev = &edp->pdev->dev; ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL); if (!ctrl) return -ENOMEM;