From patchwork Thu Feb 2 15:32:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 13126400 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 963C9C64ED9 for ; Thu, 2 Feb 2023 15:35:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232363AbjBBPfd (ORCPT ); Thu, 2 Feb 2023 10:35:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56236 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232067AbjBBPf1 (ORCPT ); Thu, 2 Feb 2023 10:35:27 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B26296E9B; Thu, 2 Feb 2023 07:34:57 -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 53041B826B7; Thu, 2 Feb 2023 15:33:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9486EC4339B; Thu, 2 Feb 2023 15:33:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1675351983; bh=Qda/PQv4RqX7g5dgxLcjBeYi+1CYJvm2YonTqRTHp+g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KALluE7lJtGUkrnFm20tyBKum8/w3TbICvviZ/It3rBf/4T+x5MOQTu4Co3Mp7DRP HVwrCAWzC0nkk6c7wLAlmtfCHRxkYrB9Zu1eqBYbJV2mOh6rHSXmQ0PVQNgnTV53rH k9SebNJCICbs7COFDLc91CaG9GPBBBfAPuOD6y8A= From: Greg Kroah-Hartman To: linux-usb@vger.kernel.org Cc: Greg Kroah-Hartman , Vincent Mailhol , linux-kernel@vger.kernel.org Subject: [PATCH 04/13] USB: sl811: fix memory leak with using debugfs_lookup() Date: Thu, 2 Feb 2023 16:32:26 +0100 Message-Id: <20230202153235.2412790-4-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=1041; i=gregkh@linuxfoundation.org; h=from:subject; bh=Qda/PQv4RqX7g5dgxLcjBeYi+1CYJvm2YonTqRTHp+g=; b=owGbwMvMwCRo6H6F97bub03G02pJDMm3r08sePN5rmds879195Im6Tst7F/gf63qZGBjj+j9Q5tP tIh7d8SyMAgyMciKKbJ82cZzdH/FIUUvQ9vTMHNYmUCGMHBxCsBErKUZFjSoLnryeQODXe79UyKlxm 3nBRc4VjPMj3k5v+/JJDGv46VTpEQ/bGnWMgg3BAA= 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: Vincent Mailhol Cc: linux-usb@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/sl811-hcd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/host/sl811-hcd.c b/drivers/usb/host/sl811-hcd.c index d206bd95c7bb..b8b90eec9107 100644 --- a/drivers/usb/host/sl811-hcd.c +++ b/drivers/usb/host/sl811-hcd.c @@ -1501,7 +1501,7 @@ static void create_debug_file(struct sl811 *sl811) static void remove_debug_file(struct sl811 *sl811) { - debugfs_remove(debugfs_lookup("sl811h", usb_debug_root)); + debugfs_lookup_and_remove("sl811h", usb_debug_root); } /*-------------------------------------------------------------------------*/