From patchwork Wed Apr 15 13:00:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Giuliano Procida X-Patchwork-Id: 227954 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.4 required=3.0 tests=DKIMWL_WL_MED, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 345AEC2BA19 for ; Wed, 15 Apr 2020 13:01:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 03E292076D for ; Wed, 15 Apr 2020 13:01:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="Wa9Xmg6b" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2503397AbgDONAf (ORCPT ); Wed, 15 Apr 2020 09:00:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53172 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S2505694AbgDONAX (ORCPT ); Wed, 15 Apr 2020 09:00:23 -0400 Received: from mail-wm1-x349.google.com (mail-wm1-x349.google.com [IPv6:2a00:1450:4864:20::349]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 843C4C061A0C for ; Wed, 15 Apr 2020 06:00:22 -0700 (PDT) Received: by mail-wm1-x349.google.com with SMTP id c196so2982507wmd.3 for ; Wed, 15 Apr 2020 06:00:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=Qr0e9VaHHqUEVdV52kGzkSBgp7xij5RTH7G4zE2O468=; b=Wa9Xmg6bfy86HBfQeVsk5Y1Aa/ufXQfw7dRiBBOakPQuBtYm9XuPyTGPFDOtnOtmqT 0n9xXSA7nWmk51I4pP1echwnFqNiQZPknIxBu/0lOMnUJ4jexrLrNJImu5ThN+4Kuk+l kZGB4zmU1UISOmQuGfN7/kDYzfXKqg0eQe1DkYDGHeXLC9w+pUy7FEOQm+RdTNXS7Gne 56ji6riGdinwdfZLu+saBiThLg5E65rJOPd5UlnKogqCqiwyACXF+H9Vzc9ru4+80bgq vUe2RbCwtRqzTC9yXk7wZjEKFMGiloCEOjnMrHmX1Hl/hey6qkLdNcrwEzW+5jMvB+YU CaAA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=Qr0e9VaHHqUEVdV52kGzkSBgp7xij5RTH7G4zE2O468=; b=XfHK45A9AbRm5XlAJtKNqZjMXpjJC/5lqEs6tK6/nhb64hUnOSnWmkrx8gD1SHprcz lXkR20iLuxGR+icO+H9ThXgJ56ElrBS8BoH1kfOY1KT0Sl+l//fFkBqk7CQ+r3pjtnBD x9Jay58IkF05/oi88QlGQ7ZcNJ10xEwsMZ5vvy3ToN+L0I6FruAdSllQYCiuvO4Hm3kN UgKdZNgISBAA7eoSnhaGh1jev0sXS76zXPVmyrglDUxKi2vX/vwjzXRt53bR104+Vbr6 o3C0O5xtNCoHxQWh2kmhSAldy15E0ihD1GnvxFxciedl+T5UzyYIuUVhVnM8zD+plOY5 oFeQ== X-Gm-Message-State: AGi0Pub397AAbBMbeaU9qons0ep2N7T2zLl0d20GSOO6XhLLyH8VUzoE 0Ab72q7+ekwWNSDjwfJDQFWunaoyNfSqMQ== X-Google-Smtp-Source: APiQypJ8zbGCAM7bVwJTHDDsT0EXvyxKaXLpD9tRCSW8CAKoSEBGD/sEhbhaf3M8yYFysiJ+53dYhtgVWrBANQ== X-Received: by 2002:a5d:6851:: with SMTP id o17mr3667179wrw.267.1586955620879; Wed, 15 Apr 2020 06:00:20 -0700 (PDT) Date: Wed, 15 Apr 2020 14:00:13 +0100 In-Reply-To: Message-Id: <20200415130017.244979-1-gprocida@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.26.0.110.g2183baf09c-goog Subject: [PATCH v2 0/4] backport request for use-after-free blk_mq_queue_tag_busy_iter From: Giuliano Procida To: greg@kroah.com Cc: Giuliano Procida , stable@vger.kernel.org Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org v2: Updated commit messages following feedback from gregkh. Here are the patches for linux-4.4.y. There are 2 further patches over those for linux-4.9.y and the differences after back-porting are non-trivial. The code complies without warnings. However, I have no suitable hardware or virtual machine to test this on. Regards, Guiliano. Giuliano Procida (4): block: more locking around delayed work blk-mq: Allow timeouts to run while queue is freezing blk-mq: sync the update nr_hw_queues with blk_mq_queue_tag_busy_iter blk-mq: Allow blocking queue tag iter callbacks block/blk-mq-tag.c | 7 ++++++- block/blk-mq.c | 17 +++++++++++++++++ block/blk-timeout.c | 3 +++ 3 files changed, 26 insertions(+), 1 deletion(-)