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 B99BEC64EC4 for ; Fri, 10 Mar 2023 14:04:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231546AbjCJOEH (ORCPT ); Fri, 10 Mar 2023 09:04:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53384 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231531AbjCJODt (ORCPT ); Fri, 10 Mar 2023 09:03:49 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2EAA2EC76 for ; Fri, 10 Mar 2023 06:03:42 -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 B8D47B822BB for ; Fri, 10 Mar 2023 14:03:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 00447C433D2; Fri, 10 Mar 2023 14:03:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678457019; bh=ENlRig7qxIZqwpN/qXepTWkVpECOpKSodtH0h5/Rp70=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iIWcBt5Ss7Z0i0u29qCZaO5Dayep6JXtIPEyzTOfKDqgrPE8J1rTsYKmEc0kzPjhD +XcPYru5+VASZ57eRLoAWtUy6JWHgHsluKH+Pu1BEOCwNK9ZnqX4oYgNFW6lnW4VSi qeKn8n+YU+6FzzxicTRpQARn+h94oB4zR5lhK4GI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Nadav Amit , VMware PV-Drivers Reviewers , Arnd Bergmann , Sasha Levin Subject: [PATCH 6.2 177/211] misc: vmw_balloon: fix memory leak with using debugfs_lookup() Date: Fri, 10 Mar 2023 14:39:17 +0100 Message-Id: <20230310133724.199834434@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230310133718.689332661@linuxfoundation.org> References: <20230310133718.689332661@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 [ Upstream commit 209cdbd07cfaa4b7385bad4eeb47e5ec1887d33d ] 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: Nadav Amit Cc: VMware PV-Drivers Reviewers Cc: Arnd Bergmann Link: https://lore.kernel.org/r/20230202141100.2291188-1-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/misc/vmw_balloon.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c index 61a2be712bf7b..9ce9b9e0e9b63 100644 --- a/drivers/misc/vmw_balloon.c +++ b/drivers/misc/vmw_balloon.c @@ -1709,7 +1709,7 @@ static void __init vmballoon_debugfs_init(struct vmballoon *b) static void __exit vmballoon_debugfs_exit(struct vmballoon *b) { static_key_disable(&balloon_stat_enabled.key); - debugfs_remove(debugfs_lookup("vmmemctl", NULL)); + debugfs_lookup_and_remove("vmmemctl", NULL); kfree(b->stats); b->stats = NULL; } -- 2.39.2