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 5A0EFC4708D for ; Wed, 4 Jan 2023 16:13:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235151AbjADQNT (ORCPT ); Wed, 4 Jan 2023 11:13:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34730 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239589AbjADQMU (ORCPT ); Wed, 4 Jan 2023 11:12:20 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E634E5FE5 for ; Wed, 4 Jan 2023 08:12:08 -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 A00DFB8172E for ; Wed, 4 Jan 2023 16:12:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D1191C433EF; Wed, 4 Jan 2023 16:12:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672848726; bh=nPxBtxz6G++DwdQglkJOF6dm4xPDMrbf3WK8tdcieK4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=swt/72o5XTWK8ft65vUO5fNLuJ7ijHNKEsvNIxjEK+w2rxvEP8+upOK8nwzKU4Vys mmEzEuXj+B9BTLguDdILCrqmWK/D9nlHIRBQNKaiOeWHGDKzzvNJ1j2rQ8U9iQZRrp qqfUe4TKlDTRBZXA04A5Go/cMe1ZreEfHv4YlvCc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Luo Meng , Mike Snitzer Subject: [PATCH 6.1 073/207] dm cache: Fix UAF in destroy() Date: Wed, 4 Jan 2023 17:05:31 +0100 Message-Id: <20230104160514.256737921@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230104160511.905925875@linuxfoundation.org> References: <20230104160511.905925875@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: Luo Meng commit 6a459d8edbdbe7b24db42a5a9f21e6aa9e00c2aa upstream. Dm_cache also has the same UAF problem when dm_resume() and dm_destroy() are concurrent. Therefore, cancelling timer again in destroy(). Cc: stable@vger.kernel.org Fixes: c6b4fcbad044e ("dm: add cache target") Signed-off-by: Luo Meng Signed-off-by: Mike Snitzer Signed-off-by: Greg Kroah-Hartman --- drivers/md/dm-cache-target.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/md/dm-cache-target.c +++ b/drivers/md/dm-cache-target.c @@ -1887,6 +1887,7 @@ static void destroy(struct cache *cache) if (cache->prison) dm_bio_prison_destroy_v2(cache->prison); + cancel_delayed_work_sync(&cache->waker); if (cache->wq) destroy_workqueue(cache->wq);