From patchwork Mon Dec 20 06:34:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiasheng Jiang X-Patchwork-Id: 526691 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 A25C5C433F5 for ; Mon, 20 Dec 2021 06:34:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237567AbhLTGey (ORCPT ); Mon, 20 Dec 2021 01:34:54 -0500 Received: from smtp21.cstnet.cn ([159.226.251.21]:34392 "EHLO cstnet.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S237557AbhLTGex (ORCPT ); Mon, 20 Dec 2021 01:34:53 -0500 Received: from localhost.localdomain (unknown [124.16.138.126]) by APP-01 (Coremail) with SMTP id qwCowAAnvqbrI8BhGjpcBA--.19122S2; Mon, 20 Dec 2021 14:34:19 +0800 (CST) From: Jiasheng Jiang To: s.hauer@pengutronix.de, kernel@pengutronix.de, shawnguo@kernel.org, festevam@gmail.com, linux-imx@nxp.com Cc: linux-fbdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Jiasheng Jiang Subject: [PATCH] video: fbdev: Check for null res pointer Date: Mon, 20 Dec 2021 14:34:18 +0800 Message-Id: <20211220063418.793624-1-jiasheng@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-CM-TRANSID: qwCowAAnvqbrI8BhGjpcBA--.19122S2 X-Coremail-Antispam: 1UD129KBjvdXoWrKrW7AF1kAF18WFW5tw18Krg_yoW3Wwc_Ca 1DurWrWr9IkF1vkF4ktr43ZryYvFsruF93urn2qasakry7Zr1rZrWUZr1fuayUur1UAFWD Aryq9r4Sv34fCjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb38FF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Cr0_ Gr1UM28EF7xvwVC2z280aVAFwI0_Cr1j6rxdM28EF7xvwVC2z280aVCY1x0267AKxVW0oV Cq3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0 I7IYx2IY67AKxVWUGVWUXwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r 4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628v n2kIc2xKxwCY02Avz4vE14v_GF1l42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr 0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY 17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcV C0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rVWrJr0_WFyUJwCI 42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWI evJa73UjIFyTuYvjfUYeHqDUUUU X-Originating-IP: [124.16.138.126] X-CM-SenderInfo: pmld2xxhqjqxpvfd2hldfou0/ Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org The return value of platform_get_resource() needs to be checked. To avoid use of error pointer in case of the failure of alloc. Fixes: f7018c213502 ("video: move fbdev to drivers/video/fbdev") Signed-off-by: Jiasheng Jiang --- drivers/video/fbdev/imxfb.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/video/fbdev/imxfb.c b/drivers/video/fbdev/imxfb.c index ad598257ab38..68288756ffff 100644 --- a/drivers/video/fbdev/imxfb.c +++ b/drivers/video/fbdev/imxfb.c @@ -1083,6 +1083,8 @@ static int imxfb_remove(struct platform_device *pdev) struct resource *res; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -EINVAL; imxfb_disable_controller(fbi);