From mboxrd@z Thu Jan 1 00:00:00 1970 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 EDA5CC636CC for ; Tue, 7 Feb 2023 13:14:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232441AbjBGNOh (ORCPT ); Tue, 7 Feb 2023 08:14:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60986 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232604AbjBGNOW (ORCPT ); Tue, 7 Feb 2023 08:14:22 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 125043A5AB for ; Tue, 7 Feb 2023 05:14:06 -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 dfw.source.kernel.org (Postfix) with ESMTPS id 098AC61452 for ; Tue, 7 Feb 2023 13:13:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 03A4BC433EF; Tue, 7 Feb 2023 13:13:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1675775593; bh=c3wjTMKDrHaQMQaifRoZbOSfF8kOcrUC6GKmohEviFs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ecPpeEqPs4bUJfgkcK3qoPCagrAtyvIdjBRUsWxgJoYQw8oqc4oxrtpy6y/PW3Cop 6C9bO6dJezidwUcjsS7u+VMGXYV7pfwnlUurkeTWzfAHicZOjuPG3CEIgorxGKqtqk fGxYzvp7m6Le813dHMv1USi/pz9+lX66F/AeEZdU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Thomas Gleixner , stable , Marc Zyngier Subject: [PATCH 5.15 092/120] kernel/irq/irqdomain.c: fix memory leak with using debugfs_lookup() Date: Tue, 7 Feb 2023 13:57:43 +0100 Message-Id: <20230207125622.680603686@linuxfoundation.org> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230207125618.699726054@linuxfoundation.org> References: <20230207125618.699726054@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Greg Kroah-Hartman commit d83d7ed260283560700d4034a80baad46620481b upstream. 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: Thomas Gleixner Cc: stable Reviewed-by: Marc Zyngier Link: https://lore.kernel.org/r/20230202151554.2310273-1-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman --- kernel/irq/irqdomain.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -1913,7 +1913,7 @@ static void debugfs_add_domain_dir(struc static void debugfs_remove_domain_dir(struct irq_domain *d) { - debugfs_remove(debugfs_lookup(d->name, domain_dir)); + debugfs_lookup_and_remove(d->name, domain_dir); } void __init irq_domain_debugfs_init(struct dentry *root)