From patchwork Fri Jan 6 15:28:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 640025 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 27668C5479D for ; Fri, 6 Jan 2023 15:28:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235111AbjAFP2j (ORCPT ); Fri, 6 Jan 2023 10:28:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42704 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235366AbjAFP2e (ORCPT ); Fri, 6 Jan 2023 10:28:34 -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 7CD8D6C283; Fri, 6 Jan 2023 07:28:33 -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 0BC736172C; Fri, 6 Jan 2023 15:28:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id ECAC0C433D2; Fri, 6 Jan 2023 15:28:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673018912; bh=15nO7ikH9WcmjcSYjC3pbic2yBoSfe31epbJuYmddYE=; h=From:To:Cc:Subject:Date:From; b=DoIqPMDnsCYhQsnrxh7KXa4t4s2otZF4k/OBK3fUX97C3o9BxR8WmzBrmw5XYwenY eIBv85fAMH2VPkuFX58sWysE8CglHL8OlZkaAHPtCWLXzFnV2BnCWM4HO0bj7IbZxK LC3XxnNiV52GOtm5bL8SpWNnAK1MQ6Lf8RS62zz4= From: Greg Kroah-Hartman To: linux-usb@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Greg Kroah-Hartman , Alan Stern , Jilin Yuan Subject: [PATCH] USB: fix memory leak with using debugfs_lookup() Date: Fri, 6 Jan 2023 16:28:28 +0100 Message-Id: <20230106152828.3790902-1-gregkh@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=875; i=gregkh@linuxfoundation.org; h=from:subject; bh=15nO7ikH9WcmjcSYjC3pbic2yBoSfe31epbJuYmddYE=; b=owGbwMvMwCRo6H6F97bub03G02pJDMk77KSOfHllqLrNJL7r/UfV65zRQZMD9CdEms1NXRp5cZe1 y7a8jlgWBkEmBlkxRZYv23iO7q84pOhlaHsaZg4rE8gQBi5OAZhIfQTDPAWvyfaad8TXPfhq3/Quj9 tr7u1TvQzzzI2EF106cVP8o9GpdTWvol8kvmK6BQA= 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: Alan Stern Cc: Jilin Yuan Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/usb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index 11b15d7b357a..a415206cab04 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -998,7 +998,7 @@ static void usb_debugfs_init(void) static void usb_debugfs_cleanup(void) { - debugfs_remove(debugfs_lookup("devices", usb_debug_root)); + debugfs_lookup_and_remove("devices", usb_debug_root); } /*