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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7B916CCD193 for ; Mon, 20 Oct 2025 15:11:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=CSSgd2COHxx3t0k29fZQJ+AVNFJrrzyVmlHhjOv9/QA=; b=iiSl7Iw1g1Ko4c KLfgFHH9V3pvhiMqesriUSNcSQ2z+Vg2FWoZxkQAHXJaaHJnc5K7VD6haPt8dPH9OE+19FuyngRmI JzoAMJD7+RQsTjsumLrrFS0Xwabo7EtXwFRmPzRPU+/qpYMMpNSi8LfanW65zK1G7ZVgj1kos4eoT A1i+Yru02LnAvnPjjBZuIIfyCPBbE/PzkCo0ot0C0kPp4NLS/HjJuwHNe35l1ObGYp9ImnyX3K44W CwBVo050iMJq6n8/OUt0v4gk09nffG/tfeWPDHAlSbOwCNvG8BhRnmP8z1GH+Bu1vQ2EkIXU5HAlo 17hPHmLKbb65IwfMWRHA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vArXb-0000000E4VD-0HIC; Mon, 20 Oct 2025 15:11:19 +0000 Received: from smtp81.cstnet.cn ([159.226.251.81] helo=cstnet.cn) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vArXW-0000000E4UG-1bNE for linux-amlogic@lists.infradead.org; Mon, 20 Oct 2025 15:11:18 +0000 Received: from DESKTOP-L0HPE2S (unknown [114.245.38.183]) by APP-03 (Coremail) with SMTP id rQCowADXH3oMUfZo9hsqEg--.25932S2; Mon, 20 Oct 2025 23:11:10 +0800 (CST) From: Haotian Zhang To: Yiting Deng , Xianwei Zhao , Alexandre Belloni Cc: linux-amlogic@lists.infradead.org, linux-rtc@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Haotian Zhang Subject: [PATCH] rtc: amlogic-a4: fix double free caused by devm Date: Mon, 20 Oct 2025 23:09:56 +0800 Message-ID: <20251020150956.491-1-vulab@iscas.ac.cn> X-Mailer: git-send-email 2.50.1.windows.1 MIME-Version: 1.0 X-CM-TRANSID: rQCowADXH3oMUfZo9hsqEg--.25932S2 X-Coremail-Antispam: 1UD129KBjvJXoW7Xr1kuF48Kr17GFyDJryxZrb_yoW8JF1UpF Z7GFyjkFsIqrW8Ka1DXrykXF15K3y8ta48KrWUW3sa93WrJFykAFZ7J3W8Xan5CrWkGa13 Wr4Utr1rGF1DuFDanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUkl14x267AKxVW8JVW5JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26r1j6r1xM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r1j 6r4UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s 0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xII jxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr 1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxkF7I0En4kS14v26r12 6r1DMxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI 0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUtVW8ZwCIc40Y 0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxV WUJVW8JwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Jr0_Gr1l IxAIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7VUbSfO7UUUU U== X-Originating-IP: [114.245.38.183] X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiBgsBA2j2KwVh2AAAsG X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251020_081114_801280_B1969BC5 X-CRM114-Status: UNSURE ( 8.48 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org The clock obtained via devm_clk_get_enabled() is automatically managed by devres and will be disabled and freed on driver detach. Manually calling clk_disable_unprepare() in error path and remove function causes double free. Remove the redundant clk_disable_unprepare() calls from the probe error path and aml_rtc_remove(), allowing the devm framework to automatically manage the clock lifecycle. Fixes: c89ac9182ee2 ("rtc: support for the Amlogic on-chip RTC") Signed-off-by: Haotian Zhang --- drivers/rtc/rtc-amlogic-a4.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/rtc/rtc-amlogic-a4.c b/drivers/rtc/rtc-amlogic-a4.c index 1928b29c1045..ed36b649c057 100644 --- a/drivers/rtc/rtc-amlogic-a4.c +++ b/drivers/rtc/rtc-amlogic-a4.c @@ -390,7 +390,6 @@ static int aml_rtc_probe(struct platform_device *pdev) return 0; err_clk: - clk_disable_unprepare(rtc->sys_clk); device_init_wakeup(dev, false); return ret; @@ -425,7 +424,6 @@ static void aml_rtc_remove(struct platform_device *pdev) { struct aml_rtc_data *rtc = dev_get_drvdata(&pdev->dev); - clk_disable_unprepare(rtc->sys_clk); device_init_wakeup(&pdev->dev, false); } -- 2.25.1 _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic