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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 8A4F9C47257 for ; Mon, 4 May 2020 18:08:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 60970205ED for ; Mon, 4 May 2020 18:08:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588615733; bh=0iRX5pdG6hLfO5oiZwm3feE0J+0QYE/p8vgpjkEUCww=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=R0Il94A6xBSJnUxvxNQI2Ot0M31Exswt1xef73uX9wDHbu7uMDzro7zovbiiHfayk bGTAN9WIYJnd78PNGxJ2fX0TOf9E5GZEcPQNnNXKXB4uUSYK0EtJPsq9p14Hb+PShB 7thU520YUJo0fQudT00YYO0BAkCDh6u+/Jm2Aqi8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731857AbgEDSIw (ORCPT ); Mon, 4 May 2020 14:08:52 -0400 Received: from mail.kernel.org ([198.145.29.99]:38360 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732154AbgEDSH3 (ORCPT ); Mon, 4 May 2020 14:07:29 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 11DDF2087E; Mon, 4 May 2020 18:07:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588615649; bh=0iRX5pdG6hLfO5oiZwm3feE0J+0QYE/p8vgpjkEUCww=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dDEJQTYh+odTOwFQuXafEJgzit0DXAcpaHOqx4kTQnhNasg68IxY4mZA46INrs7jW ooTVZYeTMKYnsJIFVZXOsnW/eRATRrEw0VDOvEyhzU30O3uQfevSLsXogVMLHQkaEg BjFI0sZ/cL4miCpB9L2+b1jnyNgCWqMMq/TiOSXs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Niklas Cassel , Christoph Hellwig Subject: [PATCH 5.6 66/73] nvme: prevent double free in nvme_alloc_ns() error handling Date: Mon, 4 May 2020 19:58:09 +0200 Message-Id: <20200504165510.184799022@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200504165501.781878940@linuxfoundation.org> References: <20200504165501.781878940@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Niklas Cassel commit 132be62387c7a72a38872676c18b0dfae264adb8 upstream. When jumping to the out_put_disk label, we will call put_disk(), which will trigger a call to disk_release(), which calls blk_put_queue(). Later in the cleanup code, we do blk_cleanup_queue(), which will also call blk_put_queue(). Putting the queue twice is incorrect, and will generate a KASAN splat. Set the disk->queue pointer to NULL, before calling put_disk(), so that the first call to blk_put_queue() will not free the queue. The second call to blk_put_queue() uses another pointer to the same queue, so this call will still free the queue. Fixes: 85136c010285 ("lightnvm: simplify geometry enumeration") Signed-off-by: Niklas Cassel Signed-off-by: Christoph Hellwig Signed-off-by: Greg Kroah-Hartman --- drivers/nvme/host/core.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -3580,6 +3580,8 @@ static int nvme_alloc_ns(struct nvme_ctr return 0; out_put_disk: + /* prevent double queue cleanup */ + ns->disk->queue = NULL; put_disk(ns->disk); out_unlink_ns: mutex_lock(&ctrl->subsys->lock);