From patchwork Tue Feb 22 13:27:06 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 12755094 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 E4CB3C4332F for ; Tue, 22 Feb 2022 13:28:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232442AbiBVN3R (ORCPT ); Tue, 22 Feb 2022 08:29:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56174 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232448AbiBVN3M (ORCPT ); Tue, 22 Feb 2022 08:29:12 -0500 Received: from smtp-relay-internal-1.canonical.com (smtp-relay-internal-1.canonical.com [185.125.188.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6835998595 for ; Tue, 22 Feb 2022 05:28:46 -0800 (PST) Received: from mail-ej1-f72.google.com (mail-ej1-f72.google.com [209.85.218.72]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-internal-1.canonical.com (Postfix) with ESMTPS id B8563402F6 for ; Tue, 22 Feb 2022 13:28:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1645536523; bh=6XeuQoqUzMUksn+ZuaBzNCPcuTk2LLoHTJkT0DsbDHY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=VKZlwWJ7g99WEIyofZ1MqRBQ33PrEKi+p/W7fixuZQiEB/2X+gc7Gr1iVWam0e3WU WitLCT92mAbGqReCm8y7JpBUs6MydgHKfP42Wa0RKywCLmybZslSxnPsQnxIWqbdMS Wh2bH6R/iRuOS/f46edLeQ1SwRPr4WjRlIKwSj9k+Njfw/eMmhKurQEr8LVtP2bptT DTj7i+gBtR9MDPAmIgpM00OfYXO9DwszqnfySNSSG2kdlGbws+f0lfuukin297dUab baGeaV8BHHyE5Kz8XyC7Nvrtq2ne0jQnhlJAYDJ12SNAj7wLVDL2deWf7FjC029JJe dFlN85JCHLnvw== Received: by mail-ej1-f72.google.com with SMTP id sa22-20020a1709076d1600b006ce78cacb85so5788004ejc.2 for ; Tue, 22 Feb 2022 05:28:43 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=6XeuQoqUzMUksn+ZuaBzNCPcuTk2LLoHTJkT0DsbDHY=; b=lrwlBgF/QN3e+oyW/pGNlXOvFlj75x5KExEPYWGcf/uDZs5ZLFMT06U7YUkfiSk2ox Kg8jrWA/brsRWXCjcYW6WJhd3t8pWanJZB3s//oCcVMXY+paXTflj1z9X9PFCxlbUX7I gSVp3SlP53raUVP2KNOPiFLatfj2BQpCef5YpdoGq98tINrmQ/sB/GMmPD0Z/zlcVC3L 1jOXTC6B+pi9fd+y03muE9fzqWpmOGGteiHyZGUk6DoFJne1CUMQwk3yXOU3wWHQsTD4 jV15FEEUZwf5wIeBGTqJaNR1yronmPqIQwpU/bQt8Jk53/R0kYL3Yo7HlV8oY/zQl9RV 79/A== X-Gm-Message-State: AOAM530V7Md5bu8wcgQS975qAk6OmG1Ryb16Ks+INI2IZgOAvVkck0fv K2JZ4dqxcQng2NkN8/zkXAt0ARBc55483X2/+u1QffrKiLBsl6fDB38ir0YJe64skDp4fnL9uEt T1ZcZ9wI/YMZm0XbyAiMW8+Cl9Z3VDu9rQ6xgH8FfYeE= X-Received: by 2002:a17:906:1656:b0:6cf:571c:f91d with SMTP id n22-20020a170906165600b006cf571cf91dmr19602329ejd.377.1645536523431; Tue, 22 Feb 2022 05:28:43 -0800 (PST) X-Google-Smtp-Source: ABdhPJymWh8nTis0+whBJdlEUIaYxkLfPNPRZyT/AbiwgON8MIxb/gad15tlt22GRXjxl9FycTeAJw== X-Received: by 2002:a17:906:1656:b0:6cf:571c:f91d with SMTP id n22-20020a170906165600b006cf571cf91dmr19602313ejd.377.1645536523213; Tue, 22 Feb 2022 05:28:43 -0800 (PST) Received: from localhost.localdomain (xdsl-188-155-181-108.adslplus.ch. [188.155.181.108]) by smtp.gmail.com with ESMTPSA id c5sm10029875edk.43.2022.02.22.05.28.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Feb 2022 05:28:42 -0800 (PST) From: Krzysztof Kozlowski To: Abel Vesa , Michael Turquette , Stephen Boyd , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Bjorn Andersson , Mathieu Poirier , Andy Gross , Srinivas Kandagatla , linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org Cc: Krzysztof Kozlowski , stable@vger.kernel.org Subject: [RFT PATCH 2/3] slimbus: qcom-ngd: fix kfree() of const memory on setting driver_override Date: Tue, 22 Feb 2022 14:27:06 +0100 Message-Id: <20220222132707.266883-3-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220222132707.266883-1-krzysztof.kozlowski@canonical.com> References: <20220222132707.266883-1-krzysztof.kozlowski@canonical.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org The driver_override field from platform driver should not be initialized from const memory because the core later kfree() it, for example when driver_override is set via sysfs. Fixes: 917809e2280b ("slimbus: ngd: Add qcom SLIMBus NGD driver") Cc: Signed-off-by: Krzysztof Kozlowski --- drivers/slimbus/qcom-ngd-ctrl.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/slimbus/qcom-ngd-ctrl.c b/drivers/slimbus/qcom-ngd-ctrl.c index 7040293c2ee8..5987d8f8a8fd 100644 --- a/drivers/slimbus/qcom-ngd-ctrl.c +++ b/drivers/slimbus/qcom-ngd-ctrl.c @@ -1455,7 +1455,14 @@ static int of_qcom_slim_ngd_register(struct device *parent, } ngd->id = id; ngd->pdev->dev.parent = parent; - ngd->pdev->driver_override = QCOM_SLIM_NGD_DRV_NAME; + ngd->pdev->driver_override = kstrdup(QCOM_SLIM_NGD_DRV_NAME, + GFP_KERNEL); + if (!ngd->pdev->driver_override) { + platform_device_put(ngd->pdev); + kfree(ngd); + of_node_put(node); + return -ENOMEM; + } ngd->pdev->dev.of_node = node; ctrl->ngd = ngd;