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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 9EE70C43611 for ; Wed, 12 May 2021 16:02:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 756CF61E28 for ; Wed, 12 May 2021 16:02:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235065AbhELQDJ (ORCPT ); Wed, 12 May 2021 12:03:09 -0400 Received: from mail.kernel.org ([198.145.29.99]:39912 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235541AbhELP21 (ORCPT ); Wed, 12 May 2021 11:28:27 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 4C8D561C21; Wed, 12 May 2021 15:13:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620832422; bh=FCyMtEtepY+BScjx75cdRn2xsF4wszsybo1Y6hvIoyM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PITcFGSuLo6RjDensbOXwz9HGpiQcBhYTi2neMW6REeXnUVWw/NuFFTw5Sy6REjYf QKvaB04GXbKmX07czczS/yxonRrjY1Bp/rnxCkJS/eRqJy9o+S5CRk+mVHdxHWiA6t 6Lk2R9AOdDm6dB/dFlJg+jeCHwFETT57r+a/Ksrw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Krzysztof Kozlowski , Sasha Levin Subject: [PATCH 5.10 256/530] memory: renesas-rpc-if: fix possible NULL pointer dereference of resource Date: Wed, 12 May 2021 16:46:06 +0200 Message-Id: <20210512144828.248550075@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144819.664462530@linuxfoundation.org> References: <20210512144819.664462530@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: Krzysztof Kozlowski [ Upstream commit 59e27d7c94aa02da039b000d33c304c179395801 ] The platform_get_resource_byname() can return NULL which would be immediately dereferenced by resource_size(). Instead dereference it after validating the resource. Addresses-Coverity: Dereference null return value Fixes: ca7d8b980b67 ("memory: add Renesas RPC-IF driver") Signed-off-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20210407154357.70200-1-krzysztof.kozlowski@canonical.com Signed-off-by: Sasha Levin --- drivers/memory/renesas-rpc-if.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/memory/renesas-rpc-if.c b/drivers/memory/renesas-rpc-if.c index da0fdb4c7595..1fe6c35b7503 100644 --- a/drivers/memory/renesas-rpc-if.c +++ b/drivers/memory/renesas-rpc-if.c @@ -193,10 +193,10 @@ int rpcif_sw_init(struct rpcif *rpc, struct device *dev) } res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dirmap"); - rpc->size = resource_size(res); rpc->dirmap = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(rpc->dirmap)) rpc->dirmap = NULL; + rpc->size = resource_size(res); rpc->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL); -- 2.30.2