From patchwork Tue Oct 15 06:01:22 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aleksandr Mishin X-Patchwork-Id: 13835743 X-Patchwork-Delegate: kuba@kernel.org Received: from mx1.t-argos.ru (mx1.t-argos.ru [109.73.34.58]) (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 8D41913BACC; Tue, 15 Oct 2024 06:04:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=109.73.34.58 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728972277; cv=none; b=SkekvXBj0cWyjfvn8o8QPiqbPZbYxdSXNSD+XuD1l9PtmGsWcByMC9DCSVahEVwjjgXQ/Qpa0lV+45IhdEKwc5kk/HZIoOK3++pyN7MYYcBMc8IlhB7a74Frw81gLLpHL+6o9VfPjW8EV0p8XdDWkViVc30jRn7//t6KvTu2gcE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728972277; c=relaxed/simple; bh=CpJN/sHxA4ytrD4pz28Sh+cNOl6nZphEhktzDoqU8lk=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Jv6mJR73+iWM8ZuS3w0q5AQeS1ezHC0VYuclQEopMJS7OFAXC5KuYfqXg3BQaMLgXLxRPR4rdBbHHJb5DyEK88YFPpJsOL9OvkgsYOhOOlwPO0YE9rG7RlCuxXvCKd/KRVf0TB1Fglh3oYgu4TUEZIkpBAqhn60DV5YnE0WxWBE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=t-argos.ru; spf=pass smtp.mailfrom=t-argos.ru; dkim=pass (2048-bit key) header.d=t-argos.ru header.i=@t-argos.ru header.b=Hetd/m7r; arc=none smtp.client-ip=109.73.34.58 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=t-argos.ru Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=t-argos.ru Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=t-argos.ru header.i=@t-argos.ru header.b="Hetd/m7r" Received: from mx1.t-argos.ru (localhost [127.0.0.1]) by mx1.t-argos.ru (Postfix) with ESMTP id 730AD100004; Tue, 15 Oct 2024 09:04:16 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=t-argos.ru; s=mail; t=1728972256; bh=go8ir/eHJu44HTUZ3QuhOEIVc9aIDc/2fwuzuUwZc0I=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; b=Hetd/m7rvKE9W+tpWErf9Kx+ilRb+WCkgh3BQmeaImMK367GP81OB3qffRub6Gam3 4uSzJhTRteObpwDj6w1PQnmpn67fKUl0QA3i4KH353hJd5zUag2hKCJXgU19WaTRJV 2n2ImYqkn/Rsduo2FheJMzHW3gRoPtKBm+U5yK0xqpZijfn7umQ/uZxBQIsZNF/ws1 WYGmYlGTqLQbBNOiA5t1b70QgKdQyreA2d0myp+pIeG6bUvP/TvHIBUMLBG6mgZkM9 nRf72GXreqWfWNPKjwCohQWS+votG69wqz/fQNed+Pz8AtxX5JwLvLkwI3LbbyNLpQ +0OTB7WpAVKBQ== Received: from mx1.t-argos.ru.ru (ta-mail-02.ta.t-argos.ru [172.17.13.212]) by mx1.t-argos.ru (Postfix) with ESMTP; Tue, 15 Oct 2024 09:03:09 +0300 (MSK) Received: from Comp.ta.t-argos.ru (172.17.44.124) by ta-mail-02 (172.17.13.212) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Tue, 15 Oct 2024 09:01:45 +0300 From: Aleksandr Mishin To: Igal Liberman CC: Aleksandr Mishin , Simon Horman , Madalin Bucur , Sean Anderson , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , , , Subject: [PATCH net 2/2] fsl/fman: Fix refcount handling of fman-related devices Date: Tue, 15 Oct 2024 09:01:22 +0300 Message-ID: <20241015060122.25709-3-amishin@t-argos.ru> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20241015060122.25709-1-amishin@t-argos.ru> References: <20241015060122.25709-1-amishin@t-argos.ru> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: ta-mail-02.ta.t-argos.ru (172.17.13.212) To ta-mail-02 (172.17.13.212) X-KSMG-Rule-ID: 1 X-KSMG-Message-Action: clean X-KSMG-AntiSpam-Lua-Profiles: 188432 [Oct 15 2024] X-KSMG-AntiSpam-Version: 6.1.0.4 X-KSMG-AntiSpam-Envelope-From: amishin@t-argos.ru X-KSMG-AntiSpam-Rate: 0 X-KSMG-AntiSpam-Status: not_detected X-KSMG-AntiSpam-Method: none X-KSMG-AntiSpam-Auth: dkim=none X-KSMG-AntiSpam-Info: LuaCore: 39 0.3.39 e168d0b3ce73b485ab2648dd465313add1404cce, {Tracking_from_domain_doesnt_match_to}, t-argos.ru:7.1.1;mx1.t-argos.ru.ru:7.1.1;d41d8cd98f00b204e9800998ecf8427e.com:7.1.1;127.0.0.199:7.1.2, FromAlignment: s X-MS-Exchange-Organization-SCL: -1 X-KSMG-AntiSpam-Interceptor-Info: scan successful X-KSMG-AntiPhishing: Clean, bases: 2024/10/15 05:27:00 X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 1.1.2.30, bases: 2024/10/15 02:26:00 #26754966 X-KSMG-AntiVirus-Status: Clean, skipped X-Patchwork-Delegate: kuba@kernel.org In mac_probe() there are multiple calls to of_find_device_by_node(), fman_bind() and fman_port_bind() which takes references to of_dev->dev. Not all references taken by these calls are released later on error path in mac_probe() and in mac_remove() which lead to reference leaks. Add references release. Fixes: 3933961682a3 ("fsl/fman: Add FMan MAC driver") Signed-off-by: Aleksandr Mishin --- Compile tested only. drivers/net/ethernet/freescale/fman/mac.c | 62 +++++++++++++++++------ 1 file changed, 47 insertions(+), 15 deletions(-) diff --git a/drivers/net/ethernet/freescale/fman/mac.c b/drivers/net/ethernet/freescale/fman/mac.c index 9b863db0bf08..11da139082e1 100644 --- a/drivers/net/ethernet/freescale/fman/mac.c +++ b/drivers/net/ethernet/freescale/fman/mac.c @@ -204,7 +204,7 @@ static int mac_probe(struct platform_device *_of_dev) if (err) { dev_err(dev, "failed to read cell-index for %pOF\n", dev_node); err = -EINVAL; - goto _return_of_node_put; + goto _return_dev_put; } /* cell-index 0 => FMan id 1 */ fman_id = (u8)(val + 1); @@ -213,40 +213,51 @@ static int mac_probe(struct platform_device *_of_dev) if (!priv->fman) { dev_err(dev, "fman_bind(%pOF) failed\n", dev_node); err = -ENODEV; - goto _return_of_node_put; + goto _return_dev_put; } + /* Two references have been taken in of_find_device_by_node() + * and fman_bind(). Release one of them here. The second one + * will be released in mac_remove(). + */ + put_device(mac_dev->fman_dev); of_node_put(dev_node); + dev_node = NULL; /* Get the address of the memory mapped registers */ mac_dev->res = platform_get_mem_or_io(_of_dev, 0); if (!mac_dev->res) { dev_err(dev, "could not get registers\n"); - return -EINVAL; + err = -EINVAL; + goto _return_dev_put; } err = devm_request_resource(dev, fman_get_mem_region(priv->fman), mac_dev->res); if (err) { dev_err_probe(dev, err, "could not request resource\n"); - return err; + goto _return_dev_put; } mac_dev->vaddr = devm_ioremap(dev, mac_dev->res->start, resource_size(mac_dev->res)); if (!mac_dev->vaddr) { dev_err(dev, "devm_ioremap() failed\n"); - return -EIO; + err = -EIO; + goto _return_dev_put; } - if (!of_device_is_available(mac_node)) - return -ENODEV; + if (!of_device_is_available(mac_node)) { + err = -ENODEV; + goto _return_dev_put; + } /* Get the cell-index */ err = of_property_read_u32(mac_node, "cell-index", &val); if (err) { dev_err(dev, "failed to read cell-index for %pOF\n", mac_node); - return -EINVAL; + err = -EINVAL; + goto _return_dev_put; } priv->cell_index = (u8)val; @@ -260,22 +271,26 @@ static int mac_probe(struct platform_device *_of_dev) if (unlikely(nph < 0)) { dev_err(dev, "of_count_phandle_with_args(%pOF, fsl,fman-ports) failed\n", mac_node); - return nph; + err = nph; + goto _return_dev_put; } if (nph != ARRAY_SIZE(mac_dev->port)) { dev_err(dev, "Not supported number of fman-ports handles of mac node %pOF from device tree\n", mac_node); - return -EINVAL; + err = -EINVAL; + goto _return_dev_put; } - for (i = 0; i < ARRAY_SIZE(mac_dev->port); i++) { + /* PORT_NUM determines the size of the port array */ + for (i = 0; i < PORT_NUM; i++) { /* Find the port node */ dev_node = of_parse_phandle(mac_node, "fsl,fman-ports", i); if (!dev_node) { dev_err(dev, "of_parse_phandle(%pOF, fsl,fman-ports) failed\n", mac_node); - return -EINVAL; + err = -EINVAL; + goto _return_dev_arr_put; } of_dev = of_find_device_by_node(dev_node); @@ -283,7 +298,7 @@ static int mac_probe(struct platform_device *_of_dev) dev_err(dev, "of_find_device_by_node(%pOF) failed\n", dev_node); err = -EINVAL; - goto _return_of_node_put; + goto _return_dev_arr_put; } mac_dev->fman_port_devs[i] = &of_dev->dev; @@ -292,9 +307,15 @@ static int mac_probe(struct platform_device *_of_dev) dev_err(dev, "dev_get_drvdata(%pOF) failed\n", dev_node); err = -EINVAL; - goto _return_of_node_put; + goto _return_dev_arr_put; } + /* Two references have been taken in of_find_device_by_node() + * and fman_port_bind(). Release one of them here. The second + * one will be released in mac_remove(). + */ + put_device(mac_dev->fman_port_devs[i]); of_node_put(dev_node); + dev_node = NULL; } /* Get the PHY connection type */ @@ -314,7 +335,7 @@ static int mac_probe(struct platform_device *_of_dev) err = init(mac_dev, mac_node, ¶ms); if (err < 0) - return err; + goto _return_dev_arr_put; if (!is_zero_ether_addr(mac_dev->addr)) dev_info(dev, "FMan MAC address: %pM\n", mac_dev->addr); @@ -329,6 +350,12 @@ static int mac_probe(struct platform_device *_of_dev) return err; +_return_dev_arr_put: + /* mac_dev is kzalloc'ed */ + for (i = 0; i < PORT_NUM; i++) + put_device(mac_dev->fman_port_devs[i]); +_return_dev_put: + put_device(mac_dev->fman_dev); _return_of_node_put: of_node_put(dev_node); return err; @@ -337,6 +364,11 @@ static int mac_probe(struct platform_device *_of_dev) static void mac_remove(struct platform_device *pdev) { struct mac_device *mac_dev = platform_get_drvdata(pdev); + int i; + + for (i = 0; i < PORT_NUM; i++) + put_device(mac_dev->fman_port_devs[i]); + put_device(mac_dev->fman_dev); platform_device_unregister(mac_dev->priv->eth_dev); }