From patchwork Thu Feb 2 15:32:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "gregkh@linuxfoundation.org" X-Patchwork-Id: 650599 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 39735C61DA4 for ; Thu, 2 Feb 2023 15:40:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232196AbjBBPk6 (ORCPT ); Thu, 2 Feb 2023 10:40:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37586 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232391AbjBBPky (ORCPT ); Thu, 2 Feb 2023 10:40:54 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9037EBB9D; Thu, 2 Feb 2023 07:40:30 -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 dfw.source.kernel.org (Postfix) with ESMTPS id 74A2C61B8C; Thu, 2 Feb 2023 15:33:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8C54CC433EF; Thu, 2 Feb 2023 15:33:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1675351993; bh=OCpQGd9y36W01Js+1AiolPPhc/FDiwwFSG64ouudZug=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KtEH7vhpb2gAmASrAaDeEBopioNdxclZKkTX7mUVj6INLSzh8G5eTL1+IguvHPu02 gfH+ZYc1bWES9rretKPDf19QyNUwUIzRAsyibdHI4jRQe1gYPCGQvzBQhf7e/IFy8W TOGpzuL3ZlWBmB6LHJkjbj5mghGUkzObB+CNXp6c= From: Greg Kroah-Hartman To: linux-usb@vger.kernel.org Cc: Greg Kroah-Hartman , Jakob Koschel , linux-kernel@vger.kernel.org Subject: [PATCH 08/13] USB: gadget: gr_udc: fix memory leak with using debugfs_lookup() Date: Thu, 2 Feb 2023 16:32:30 +0100 Message-Id: <20230202153235.2412790-8-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=1020; i=gregkh@linuxfoundation.org; h=from:subject; bh=OCpQGd9y36W01Js+1AiolPPhc/FDiwwFSG64ouudZug=; b=owGbwMvMwCRo6H6F97bub03G02pJDMm3r0+6Jjrf0IQv3T1LNdVebeNUmRsbr/fMWSLx8o5sYMfp en7rjlgWBkEmBlkxRZYv23iO7q84pOhlaHsaZg4rE8gQBi5OAZiIxWGG+TFX25p4vs5aIeC55XN9VO 7r+G07ZzPMj/CSbLzMalPfWxzscXd/XH+DtRA7AA== 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: Jakob Koschel Cc: linux-usb@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/udc/gr_udc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/gadget/udc/gr_udc.c b/drivers/usb/gadget/udc/gr_udc.c index 22096f8505de..52c12c96c275 100644 --- a/drivers/usb/gadget/udc/gr_udc.c +++ b/drivers/usb/gadget/udc/gr_udc.c @@ -215,7 +215,7 @@ static void gr_dfs_create(struct gr_udc *dev) static void gr_dfs_delete(struct gr_udc *dev) { - debugfs_remove(debugfs_lookup(dev_name(dev->dev), usb_debug_root)); + debugfs_lookup_and_remove(dev_name(dev->dev), usb_debug_root); } #else /* !CONFIG_USB_GADGET_DEBUG_FS */