From patchwork Thu Feb 2 15:32:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 650600 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3931FC636D6 for ; Thu, 2 Feb 2023 15:37:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232773AbjBBPhM (ORCPT ); Thu, 2 Feb 2023 10:37:12 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58410 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232889AbjBBPgq (ORCPT ); Thu, 2 Feb 2023 10:36:46 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 538E44F86B; Thu, 2 Feb 2023 07:36:06 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id CAF0DB826AD; Thu, 2 Feb 2023 15:33:20 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1103CC4339C; Thu, 2 Feb 2023 15:33:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1675351999; bh=LxA279H1FvrJsAusP/AZ5gRL/bHuKKZsq2ugyns8LMw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nI3g5+y7Skra/emw8kuhlV9ktB54HmaJDyN9sJzPlqo2gT+e3C4eBZPR45Q0u0aTR IFhRpwUt1zN7PyvBl4KkQYwzP378dY0AnGSMaorT+oBkD74KNcivMoZ12rtxkZhLND IpbzE1DsHQB4xwq9QJ/X3HcY9OlL3vNXM/yKZzzc= From: Greg Kroah-Hartman To: linux-usb@vger.kernel.org Cc: Greg Kroah-Hartman , Vladimir Zapolskiy , Jakob Koschel , Miaoqian Lin , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 10/13] USB: gadget: lpc32xx_udc: fix memory leak with using debugfs_lookup() Date: Thu, 2 Feb 2023 16:32:32 +0100 Message-Id: <20230202153235.2412790-10-gregkh@linuxfoundation.org> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230202153235.2412790-1-gregkh@linuxfoundation.org> References: <20230202153235.2412790-1-gregkh@linuxfoundation.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1121; i=gregkh@linuxfoundation.org; h=from:subject; bh=LxA279H1FvrJsAusP/AZ5gRL/bHuKKZsq2ugyns8LMw=; b=owGbwMvMwCRo6H6F97bub03G02pJDMm3r086e3N95v++mDfTLTbt0d/4QEnTJjFWIcH9wqPd6inn b1mc7ohlYRBkYpAVU2T5so3n6P6KQ4pehranYeawMoEMYeDiFICJLGljmF8ovfvh1wSfn47J/rqXPE Js3l270cawYI17wtnLkyWb380Kjgz0Fo07PCvkLQA= X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org When calling debugfs_lookup() the result must have dput() called on it, otherwise the memory will leak over time. To make things simpler, just call debugfs_lookup_and_remove() instead which handles all of the logic at once. Cc: Vladimir Zapolskiy Cc: Jakob Koschel Cc: Miaoqian Lin Cc: linux-usb@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/udc/lpc32xx_udc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/gadget/udc/lpc32xx_udc.c b/drivers/usb/gadget/udc/lpc32xx_udc.c index cea10cdb83ae..fe62db32dd0e 100644 --- a/drivers/usb/gadget/udc/lpc32xx_udc.c +++ b/drivers/usb/gadget/udc/lpc32xx_udc.c @@ -532,7 +532,7 @@ static void create_debug_file(struct lpc32xx_udc *udc) static void remove_debug_file(struct lpc32xx_udc *udc) { - debugfs_remove(debugfs_lookup(debug_filename, NULL)); + debugfs_lookup_and_remove(debug_filename, NULL); } #else