From patchwork Thu Jun 6 02:37:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yang Yingliang X-Patchwork-Id: 802436 Received: from szxga04-in.huawei.com (szxga04-in.huawei.com [45.249.212.190]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 890F018638 for ; Thu, 6 Jun 2024 02:39:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.190 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717641588; cv=none; b=OzXPSqcJwqYbxg+6DVrIZ6ueHkqVQwujQqkgLwUtWKWJup2YUwFD/fvaYzKtZmvmGRvmKyVDAwoIgMqD5lTxw7jWLnbsRUKybCEFBFmcBUieOIyEqTtWcgPhiCjY9zZrwpy8nq9/CKvpQd7dDqgh1MPJd+7tjGoeRu7evLT2Yrw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717641588; c=relaxed/simple; bh=hXc+4oXOhyslLI3IpD7uRvViVSHhPESdYcf5f483SDE=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Epi0VVA/05t813bIcYGqGcU0ad8yZLBIjwx85lQWKbHCY050Vo1AX52k/GpBUQYECbtLu2c3Ghf0XLA0lgolBr70rKbV/xY9dx7uUPPAPpj6xyu3NLXsRrvxwvTid+zHWISKzrohGewVQkDKV2MYcb+J4Fa4r/dUlLO76qbYaQY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.190 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.88.214]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4VvpNd1PcBz2Cjp1; Thu, 6 Jun 2024 10:36:01 +0800 (CST) Received: from dggpemm100022.china.huawei.com (unknown [7.185.36.132]) by mail.maildlp.com (Postfix) with ESMTPS id 31E221A016C; Thu, 6 Jun 2024 10:39:43 +0800 (CST) Received: from dggpemm500007.china.huawei.com (7.185.36.183) by dggpemm100022.china.huawei.com (7.185.36.132) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Thu, 6 Jun 2024 10:39:42 +0800 Received: from huawei.com (10.175.103.91) by dggpemm500007.china.huawei.com (7.185.36.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Thu, 6 Jun 2024 10:39:42 +0800 From: Yang Yingliang To: CC: , , , , , Subject: [PATCH v2 1/3] pinctrl: core: fix possible memory leak when pinctrl_enable() fails Date: Thu, 6 Jun 2024 10:37:02 +0800 Message-ID: <20240606023704.3931561-2-yangyingliang@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240606023704.3931561-1-yangyingliang@huawei.com> References: <20240606023704.3931561-1-yangyingliang@huawei.com> Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To dggpemm500007.china.huawei.com (7.185.36.183) In devm_pinctrl_register(), if pinctrl_enable() fails in pinctrl_register(), the "pctldev" has not been added to dev resources, so devm_pinctrl_dev_release() can not be called, it leads memory leak. Introduce pinctrl_uninit_controller(), call it in the error path to free memory. Fixes: 5038a66dad01 ("pinctrl: core: delete incorrect free in pinctrl_enable()") Signed-off-by: Yang Yingliang --- drivers/pinctrl/core.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c index cffeb869130d..7343a17c2873 100644 --- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -2080,6 +2080,14 @@ pinctrl_init_controller(struct pinctrl_desc *pctldesc, struct device *dev, return ERR_PTR(ret); } +static void pinctrl_uninit_controller(struct pinctrl_dev *pctldev, struct pinctrl_desc *pctldesc) +{ + pinctrl_free_pindescs(pctldev, pctldesc->pins, + pctldesc->npins); + mutex_destroy(&pctldev->mutex); + kfree(pctldev); +} + static int pinctrl_claim_hogs(struct pinctrl_dev *pctldev) { pctldev->p = create_pinctrl(pctldev->dev, pctldev); @@ -2160,8 +2168,10 @@ struct pinctrl_dev *pinctrl_register(struct pinctrl_desc *pctldesc, return pctldev; error = pinctrl_enable(pctldev); - if (error) + if (error) { + pinctrl_uninit_controller(pctldev, pctldesc); return ERR_PTR(error); + } return pctldev; }