From nobody Wed Nov 27 00:34:41 2024 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 834B72AD00; Tue, 15 Oct 2024 06:04:03 +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=1728972245; cv=none; b=QojSfI9rujb4Ij9E0bkLE1NRM7kazFbxnDrJhIRqffOzdu0fcQ5MY3BDUNgjNfhsVeQ3dSZWgBzwUfHNiw8PNg+IPQDzh3nABHqO+0/sxqvBaw5hkp2TbIGtTL8vftD4KWm9b3jhcwBTO/w1kCRT/+X5CqGV6azasjdH5ezH9PE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728972245; c=relaxed/simple; bh=sJCB1sVCo7h+hJMurWNTUZO2lGF33iaTwyvPQ5lU9mM=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=A4ejZDdv5j3VUgfAio8EK1YqiMoimhTTIjedhsPtZ4ruV8+ESc0iwQkdElpIUBWr9egoBYkMjWwIAWfcJhQNyuYhP4WIy/BEzh0zQ0N7MO0N6ayXkPD98MVuEpedIA1Ey4giMn7tsviEZkSYS4SZCqEbNjLgLPQTX1t/Mid9xjA= 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=C0oaSeM5; 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="C0oaSeM5" Received: from mx1.t-argos.ru (localhost [127.0.0.1]) by mx1.t-argos.ru (Postfix) with ESMTP id 90F52100003; Tue, 15 Oct 2024 09:03:46 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=t-argos.ru; s=mail; t=1728972226; bh=AE7fY2zWoa1DLTMmoszQOugsxyMv9/IkDR2L061DiNU=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; b=C0oaSeM5mPiN+46UCQZk7dbaqo1gEdfFHwRMcvzXoLhPD+crtzrX81+iWjBf7oXyi nkT49A47KnqlIQ+rqtzpwmfopSdQWulVGIQepXHslNmSMGrBKa1wOOiTxJtgTCEHic jqubEFPhHw/F/g9BOf/Up+z7is3Mqf5JwLkW4DZy1sseHbyEX57wYMbV+qBhIn41H3 Ec8GDi71ScsOvbj8enHmj8xB8h+z9K1EUOiw1IdjrHNz6P9f4FVT6odNNyZrP2sCYl HD9q3ETx8PbZLf6EXtoPa8nfxj9vxpRU1f+iKXQ5L7xiU2VIR8n0D4GOQAVjp6cuo5 wdDIBlEMOntLw== 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 09:02:39 +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 09:01:44 +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 1/2] fsl/fman: Save device references taken in mac_probe() Date: Tue, 15 Oct 2024 09:01:21 +0300 Message-ID: <20241015060122.25709-2-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: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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}, mx1.t-argos.ru.ru:7.1.1;d41d8cd98f00b204e9800998ecf8427e.com:7.1.1;127.0.0.199:7.1.2;t-argos.ru:7.1.1, 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 Content-Type: text/plain; charset="utf-8" In mac_probe() there are calls to of_find_device_by_node() which takes references to of_dev->dev. These references are not saved and not released later on error path in mac_probe() and in mac_remove(). Add new fields into mac_device structure to save references taken for future use in mac_probe() and mac_remove(). This is a preparation for further reference leaks fix. Signed-off-by: Aleksandr Mishin --- drivers/net/ethernet/freescale/fman/mac.c | 6 ++++-- drivers/net/ethernet/freescale/fman/mac.h | 6 +++++- 2 files changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/freescale/fman/mac.c b/drivers/net/ethern= et/freescale/fman/mac.c index 9767586b4eb3..9b863db0bf08 100644 --- a/drivers/net/ethernet/freescale/fman/mac.c +++ b/drivers/net/ethernet/freescale/fman/mac.c @@ -197,6 +197,7 @@ static int mac_probe(struct platform_device *_of_dev) err =3D -EINVAL; goto _return_of_node_put; } + mac_dev->fman_dev =3D &of_dev->dev; =20 /* Get the FMan cell-index */ err =3D of_property_read_u32(dev_node, "cell-index", &val); @@ -208,7 +209,7 @@ static int mac_probe(struct platform_device *_of_dev) /* cell-index 0 =3D> FMan id 1 */ fman_id =3D (u8)(val + 1); =20 - priv->fman =3D fman_bind(&of_dev->dev); + priv->fman =3D fman_bind(mac_dev->fman_dev); if (!priv->fman) { dev_err(dev, "fman_bind(%pOF) failed\n", dev_node); err =3D -ENODEV; @@ -284,8 +285,9 @@ static int mac_probe(struct platform_device *_of_dev) err =3D -EINVAL; goto _return_of_node_put; } + mac_dev->fman_port_devs[i] =3D &of_dev->dev; =20 - mac_dev->port[i] =3D fman_port_bind(&of_dev->dev); + mac_dev->port[i] =3D fman_port_bind(mac_dev->fman_port_devs[i]); if (!mac_dev->port[i]) { dev_err(dev, "dev_get_drvdata(%pOF) failed\n", dev_node); diff --git a/drivers/net/ethernet/freescale/fman/mac.h b/drivers/net/ethern= et/freescale/fman/mac.h index fe747915cc73..8b5b43d50f8e 100644 --- a/drivers/net/ethernet/freescale/fman/mac.h +++ b/drivers/net/ethernet/freescale/fman/mac.h @@ -19,12 +19,13 @@ struct fman_mac; struct mac_priv_s; =20 +#define PORT_NUM 2 struct mac_device { void __iomem *vaddr; struct device *dev; struct resource *res; u8 addr[ETH_ALEN]; - struct fman_port *port[2]; + struct fman_port *port[PORT_NUM]; struct phylink *phylink; struct phylink_config phylink_config; phy_interface_t phy_if; @@ -52,6 +53,9 @@ struct mac_device { =20 struct fman_mac *fman_mac; struct mac_priv_s *priv; + + struct device *fman_dev; + struct device *fman_port_devs[PORT_NUM]; }; =20 static inline struct mac_device --=20 2.30.2 From nobody Wed Nov 27 00:34:41 2024 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; 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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: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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 Content-Type: text/plain; charset="utf-8" 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/ethern= et/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 =3D -EINVAL; - goto _return_of_node_put; + goto _return_dev_put; } /* cell-index 0 =3D> FMan id 1 */ fman_id =3D (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 =3D -ENODEV; - goto _return_of_node_put; + goto _return_dev_put; } =20 + /* 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 =3D NULL; =20 /* Get the address of the memory mapped registers */ mac_dev->res =3D platform_get_mem_or_io(_of_dev, 0); if (!mac_dev->res) { dev_err(dev, "could not get registers\n"); - return -EINVAL; + err =3D -EINVAL; + goto _return_dev_put; } =20 err =3D 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; } =20 mac_dev->vaddr =3D 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 =3D -EIO; + goto _return_dev_put; } =20 - if (!of_device_is_available(mac_node)) - return -ENODEV; + if (!of_device_is_available(mac_node)) { + err =3D -ENODEV; + goto _return_dev_put; + } =20 /* Get the cell-index */ err =3D 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 =3D -EINVAL; + goto _return_dev_put; } priv->cell_index =3D (u8)val; =20 @@ -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 =3D nph; + goto _return_dev_put; } =20 if (nph !=3D ARRAY_SIZE(mac_dev->port)) { dev_err(dev, "Not supported number of fman-ports handles of mac node %pO= F from device tree\n", mac_node); - return -EINVAL; + err =3D -EINVAL; + goto _return_dev_put; } =20 - for (i =3D 0; i < ARRAY_SIZE(mac_dev->port); i++) { + /* PORT_NUM determines the size of the port array */ + for (i =3D 0; i < PORT_NUM; i++) { /* Find the port node */ dev_node =3D 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 =3D -EINVAL; + goto _return_dev_arr_put; } =20 of_dev =3D 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 =3D -EINVAL; - goto _return_of_node_put; + goto _return_dev_arr_put; } mac_dev->fman_port_devs[i] =3D &of_dev->dev; =20 @@ -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 =3D -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 =3D NULL; } =20 /* Get the PHY connection type */ @@ -314,7 +335,7 @@ static int mac_probe(struct platform_device *_of_dev) =20 err =3D init(mac_dev, mac_node, ¶ms); if (err < 0) - return err; + goto _return_dev_arr_put; =20 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) =20 return err; =20 +_return_dev_arr_put: + /* mac_dev is kzalloc'ed */ + for (i =3D 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 =3D platform_get_drvdata(pdev); + int i; + + for (i =3D 0; i < PORT_NUM; i++) + put_device(mac_dev->fman_port_devs[i]); + put_device(mac_dev->fman_dev); =20 platform_device_unregister(mac_dev->priv->eth_dev); } --=20 2.30.2