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 7F93AC54EBE for ; Mon, 16 Jan 2023 17:01:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234137AbjAPRB0 (ORCPT ); Mon, 16 Jan 2023 12:01:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51156 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234148AbjAPRAl (ORCPT ); Mon, 16 Jan 2023 12:00:41 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6230D5A347 for ; Mon, 16 Jan 2023 08:43:23 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id F0D6F6108A for ; Mon, 16 Jan 2023 16:43:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0F835C433EF; Mon, 16 Jan 2023 16:43:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673887402; bh=uDAte1RpoAeMEG0xY9DQxh+2+UKfc/K6DU5oMTQm6og=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zFrJ9okkNegaMC1p4IX6keyQik73T7uhk57qD65Wyg373o6afDVZqYCQ5Gj85bf2O SBA5bZauqmgA5szSCpNRQy6sggZi9ZVl0XeuMJ3tvSJ7XFaQmEyC3nEw5wXV/FNyjk M7m9ErmsfxVTDY0B+EOgQ/V0kofyl7uFHUaHJPgc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Hui Tang , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Miquel Raynal , Sasha Levin Subject: [PATCH 4.19 106/521] mtd: lpddr2_nvm: Fix possible null-ptr-deref Date: Mon, 16 Jan 2023 16:46:08 +0100 Message-Id: <20230116154851.993354397@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230116154847.246743274@linuxfoundation.org> References: <20230116154847.246743274@linuxfoundation.org> User-Agent: quilt/0.67 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: Hui Tang [ Upstream commit 6bdd45d795adf9e73b38ced5e7f750cd199499ff ] It will cause null-ptr-deref when resource_size(add_range) invoked, if platform_get_resource() returns NULL. Fixes: 96ba9dd65788 ("mtd: lpddr: add driver for LPDDR2-NVM PCM memories") Signed-off-by: Hui Tang Acked-by: Uwe Kleine-König Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20221114090240.244172-1-tanghui20@huawei.com Signed-off-by: Sasha Levin --- drivers/mtd/lpddr/lpddr2_nvm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/mtd/lpddr/lpddr2_nvm.c b/drivers/mtd/lpddr/lpddr2_nvm.c index 90e6cb64db69..b004d3213a66 100644 --- a/drivers/mtd/lpddr/lpddr2_nvm.c +++ b/drivers/mtd/lpddr/lpddr2_nvm.c @@ -442,6 +442,8 @@ static int lpddr2_nvm_probe(struct platform_device *pdev) /* lpddr2_nvm address range */ add_range = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!add_range) + return -ENODEV; /* Populate map_info data structure */ *map = (struct map_info) { -- 2.35.1