From patchwork Mon Apr 19 11:25:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wong Vee Khee X-Patchwork-Id: 424352 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B261AC433B4 for ; Mon, 19 Apr 2021 11:21:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8AC636108B for ; Mon, 19 Apr 2021 11:21:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238058AbhDSLVn (ORCPT ); Mon, 19 Apr 2021 07:21:43 -0400 Received: from mga03.intel.com ([134.134.136.65]:61008 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237765AbhDSLVn (ORCPT ); Mon, 19 Apr 2021 07:21:43 -0400 IronPort-SDR: KqJDVvEPYAFDtkd7dGJ+o8X4NzwjvUqrZtsGbfgv6D4UKrirR5fswb8cT/KzRX9Ft+V3k6s/Mu /H4fL6sHteNQ== X-IronPort-AV: E=McAfee;i="6200,9189,9958"; a="195336831" X-IronPort-AV: E=Sophos;i="5.82,234,1613462400"; d="scan'208";a="195336831" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Apr 2021 04:20:56 -0700 IronPort-SDR: gG9C6LbgTpQvO1pgi3EUWUtteiHAWMr3es6AOL9cOIY9BL44ntzJSGacgAPQMcVOriHIa6Wfu3 F5yC971w9myg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.82,234,1613462400"; d="scan'208";a="390630159" Received: from linux.intel.com ([10.54.29.200]) by fmsmga007.fm.intel.com with ESMTP; 19 Apr 2021 04:20:55 -0700 Received: from glass.png.intel.com (glass.png.intel.com [10.158.65.59]) by linux.intel.com (Postfix) with ESMTP id 669915808CA; Mon, 19 Apr 2021 04:20:53 -0700 (PDT) From: Wong Vee Khee To: Giuseppe Cavallaro , Alexandre Torgue , Jose Abreu , "David S . Miller" , Jakub Kicinski , Maxime Coquelin Cc: Ong Boon Leong , netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next 1/1] net: stmmac: fix memory leak during driver probe Date: Mon, 19 Apr 2021 19:25:30 +0800 Message-Id: <20210419112530.20395-1-vee.khee.wong@linux.intel.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On driver probe, kmemleak reported the following memory leak which was due to allocated bitmap that was not being freed in stmmac_dvr_probe(). unreferenced object 0xffff9276014b13c0 (size 8): comm "systemd-udevd", pid 2143, jiffies 4294681112 (age 116.720s) hex dump (first 8 bytes): 00 00 00 00 00 00 00 00 ........ backtrace: [<00000000c51e34b2>] stmmac_dvr_probe+0x1c0/0x440 [stmmac] [<00000000b530eb41>] intel_eth_pci_probe.cold+0x2b/0x14e [dwmac_intel] [<00000000b10f8929>] pci_device_probe+0xd2/0x150 [<00000000fb254c74>] really_probe+0xf8/0x410 [<0000000034128a59>] driver_probe_device+0x5d/0x150 [<00000000016104d5>] device_driver_attach+0x53/0x60 [<00000000cb18cd07>] __driver_attach+0x96/0x140 [<00000000da9ffd5c>] bus_for_each_dev+0x7a/0xc0 [<00000000af061a88>] bus_add_driver+0x184/0x1f0 [<000000008be5c1c5>] driver_register+0x6c/0xc0 [<0000000052b18a9e>] do_one_initcall+0x4d/0x210 [<00000000154d4f07>] do_init_module+0x5c/0x230 [<000000009b648d09>] load_module+0x2a5a/0x2d40 [<000000000d86b76d>] __do_sys_finit_module+0xb5/0x120 [<000000002b0cef95>] do_syscall_64+0x33/0x40 [<0000000067b45bbb>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 Fixes: bba2556efad6 ("net: stmmac: Enable RX via AF_XDP zero-copy") Cc: Ong Boon Leong Signed-off-by: Wong Vee Khee --- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 9f396648d76f..d1ca07c846e6 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -7035,6 +7035,7 @@ int stmmac_dvr_probe(struct device *device, error_hw_init: destroy_workqueue(priv->wq); stmmac_bus_clks_config(priv, false); + bitmap_free(priv->af_xdp_zc_qps); return ret; } @@ -7077,6 +7078,7 @@ int stmmac_dvr_remove(struct device *dev) stmmac_mdio_unregister(ndev); destroy_workqueue(priv->wq); mutex_destroy(&priv->lock); + bitmap_free(priv->af_xdp_zc_qps); return 0; }