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=ham 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 EEE4CC282CE for ; Mon, 22 Apr 2019 19:49:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B2A3F204EC for ; Mon, 22 Apr 2019 19:49:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1555962599; bh=k5+fulfP+RLmd3CsE181bxaKbgPjLoSW+vjOFrf8BAQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=gPK+mtcsph6BezZKYLR1AQNUKCF3Q7B2Mx4vl79WJ1BvErigpyx7HePZ+QEgUmhJr GTG/p5Q4e88T5hRVQNqrqJJYa2n3NzB1/s7lVSBiucgS5QE7mbda1l7YyYUbfYsovx ANwvvz28u1AEI4VEybcw6g/E53NEs+ubAo475zt8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730966AbfDVTt6 (ORCPT ); Mon, 22 Apr 2019 15:49:58 -0400 Received: from mail.kernel.org ([198.145.29.99]:53554 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730908AbfDVTtm (ORCPT ); Mon, 22 Apr 2019 15:49:42 -0400 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 8B71921738; Mon, 22 Apr 2019 19:49:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1555962581; bh=k5+fulfP+RLmd3CsE181bxaKbgPjLoSW+vjOFrf8BAQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UBKczZUUR5Goe6uc2Zn9Y53SNh9xslORxj72tjKcA3//bdO+762u18mXs3Lip0kuQ Ejhrw+2xb/W2NnGzrBJTSTOcv4AayDMZ6dch8jykWmO1Nr2Jw/+ZzMfDImEpgFAhEw 6EggVxFmVOTYPcTjw7TIcdie4PRMeUg6rPZRZGG0= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Kangjie Lu , Jacek Anaszewski , Sasha Levin , linux-leds@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 29/29] leds: pca9532: fix a potential NULL pointer dereference Date: Mon, 22 Apr 2019 15:48:48 -0400 Message-Id: <20190422194848.13049-29-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190422194848.13049-1-sashal@kernel.org> References: <20190422194848.13049-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Kangjie Lu [ Upstream commit 0aab8e4df4702b31314a27ec4b0631dfad0fae0a ] In case of_match_device cannot find a match, return -EINVAL to avoid NULL pointer dereference. Fixes: fa4191a609f2 ("leds: pca9532: Add device tree support") Signed-off-by: Kangjie Lu Signed-off-by: Jacek Anaszewski Signed-off-by: Sasha Levin (Microsoft) --- drivers/leds/leds-pca9532.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/leds/leds-pca9532.c b/drivers/leds/leds-pca9532.c index 09a7cffbc46f..896b38f6f9c0 100644 --- a/drivers/leds/leds-pca9532.c +++ b/drivers/leds/leds-pca9532.c @@ -488,6 +488,7 @@ static int pca9532_probe(struct i2c_client *client, const struct i2c_device_id *id) { int devid; + const struct of_device_id *of_id; struct pca9532_data *data = i2c_get_clientdata(client); struct pca9532_platform_data *pca9532_pdata = dev_get_platdata(&client->dev); @@ -503,8 +504,11 @@ static int pca9532_probe(struct i2c_client *client, dev_err(&client->dev, "no platform data\n"); return -EINVAL; } - devid = (int)(uintptr_t)of_match_device( - of_pca9532_leds_match, &client->dev)->data; + of_id = of_match_device(of_pca9532_leds_match, + &client->dev); + if (unlikely(!of_id)) + return -EINVAL; + devid = (int)(uintptr_t) of_id->data; } else { devid = id->driver_data; } -- 2.19.1