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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4159AC433EF for ; Mon, 30 May 2022 14:11:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=0YSUcpR+t3u4msnX+ngJySeql696Zuw9doNVdIig8gw=; b=4wPYzWxN8A2pDSX/eN+hnVbKkE oeINeRxDg3+i8dys//Thfz7yhO9MIBMKwMSzpeFamri2GtU5c+Mas2gy8TypVuF5vgwt+5vpvxw7V AsdjgjGeUiVD+Ddl983T0Gk0vSNPk5HtKpTdf1ujRuqi9kbCd/dipsT4TyLLp4tMbfnBqKJHdilvQ wliMeDFgaZzpPcGw4OlK1uXN92nj9AjUDuzLzZ/1ULcCDeJPv/XLuc63X9Q0bQ614oWBiFaE5o0dV 40WhhT0AdpjDEEbzs9eSp+61ye+L033OawMEFcmIxDZOl/H5DptFGTSTdi6wkWz/kp58Rbo/SqLK4 EgUKYhGg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nvg74-0075JT-Lp; Mon, 30 May 2022 14:11:18 +0000 Received: from ams.source.kernel.org ([145.40.68.75]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nvfix-006rcH-AM for linux-nvme@lists.infradead.org; Mon, 30 May 2022 13:46:27 +0000 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 BCB95B80D83; Mon, 30 May 2022 13:46:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 22551C3411C; Mon, 30 May 2022 13:46:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1653918380; bh=4+g9D5xTre7t5UvhEJEZqO+KyPzsgxnaoiiOJSFfVww=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=t3Fi8dzw8SVAqcbb9fzSWJrF1iQIJt6mHKuXYkQPjqS57OFLw5TkZmhPfkgqNvnEp f/fY4RCCLbJCJtNgW6wDfJDPqS3PxxClkV3PYAQnTrBmkXaLWYMymMSuXcOd3vuj1T 402h1/Yrzg3LVMz4gz6/0MmmGjRrMRGCwPttfpzfUv391I0E6fnMUOT4fNuD2EKTgQ WmTWn9vkfYYCyNPJTnrhbMb/reUWrdN9X5/J1MAxtLfL2MQL8uT8UvXndcBgeT+neo di4RZ4DkslX5k6qZZfiVx4DKDUlsTPtvcKXRMzvugioFNaIokgbchE2fOMgwD8YD03 mxwR8ZXsxJzZw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: "Smith, Kyle Miller (Nimble Kernel)" , Chaitanya Kulkarni , Hannes Reinecke , Christoph Hellwig , Sasha Levin , kbusch@kernel.org, axboe@fb.com, sagi@grimberg.me, linux-nvme@lists.infradead.org Subject: [PATCH AUTOSEL 5.10 60/76] nvme-pci: fix a NULL pointer dereference in nvme_alloc_admin_tags Date: Mon, 30 May 2022 09:43:50 -0400 Message-Id: <20220530134406.1934928-60-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220530134406.1934928-1-sashal@kernel.org> References: <20220530134406.1934928-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220530_064623_624734_63112AC8 X-CRM114-Status: GOOD ( 14.82 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org From: "Smith, Kyle Miller (Nimble Kernel)" [ Upstream commit da42761181627e9bdc37d18368b827948a583929 ] In nvme_alloc_admin_tags, the admin_q can be set to an error (typically -ENOMEM) if the blk_mq_init_queue call fails to set up the queue, which is checked immediately after the call. However, when we return the error message up the stack, to nvme_reset_work the error takes us to nvme_remove_dead_ctrl() nvme_dev_disable() nvme_suspend_queue(&dev->queues[0]). Here, we only check that the admin_q is non-NULL, rather than not an error or NULL, and begin quiescing a queue that never existed, leading to bad / NULL pointer dereference. Signed-off-by: Kyle Smith Reviewed-by: Chaitanya Kulkarni Reviewed-by: Hannes Reinecke Signed-off-by: Christoph Hellwig Signed-off-by: Sasha Levin --- drivers/nvme/host/pci.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index a36db0701d17..7de24a10dd92 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -1666,6 +1666,7 @@ static int nvme_alloc_admin_tags(struct nvme_dev *dev) dev->ctrl.admin_q = blk_mq_init_queue(&dev->admin_tagset); if (IS_ERR(dev->ctrl.admin_q)) { blk_mq_free_tag_set(&dev->admin_tagset); + dev->ctrl.admin_q = NULL; return -ENOMEM; } if (!blk_get_queue(dev->ctrl.admin_q)) { -- 2.35.1