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=-8.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 76122C48BE9 for ; Mon, 24 Jun 2019 10:04:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4BEB2205ED for ; Mon, 24 Jun 2019 10:04:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561370699; bh=VgWhUrVJchQpsFI0+NHb7ob7Q1OZC/5JE8+uJDsX3fo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=sVadXCCRYtv0hjGZE8FlTCezjfHX4WweOIJyV1rRHF59PcpJLTRvO48xhcY8q1xJj 4fONYMUitzkABWqQ2WCcthQY5LNgdW84wH17b35DwaOOqo5vMcZuIDBfIlh1U29kjU IkA4iHK1jrW4e2LH9s5iBnNUtGmdNKXGlGvsD4OE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729432AbfFXKE5 (ORCPT ); Mon, 24 Jun 2019 06:04:57 -0400 Received: from mail.kernel.org ([198.145.29.99]:36730 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729047AbfFXKE4 (ORCPT ); Mon, 24 Jun 2019 06:04:56 -0400 Received: from localhost (f4.8f.5177.ip4.static.sl-reverse.com [119.81.143.244]) (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 D2644208E3; Mon, 24 Jun 2019 10:04:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561370695; bh=VgWhUrVJchQpsFI0+NHb7ob7Q1OZC/5JE8+uJDsX3fo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GNsWcQ6+qnlpYAewQG2/bf2IiiAVmvwIMNU5Z/6pTMChOsAY1hrvJ1nmY28YrYhQR pOCegVquPtqQlNFJwAwYkZaDJhmJPKNEK/4RoREYB/54QJ35thCQs96D/v4xuLcnC5 3CFDUhyGD3mQ3/koBH5lMWlg6pxj+SQRBYdaXJPI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Christoph Hellwig , Sagi Grimberg , Chaitanya Kulkarni , Minwoo Im , Chaitanya Kulkarni , Sasha Levin Subject: [PATCH 4.19 58/90] nvmet: fix data_len to 0 for bdev-backed write_zeroes Date: Mon, 24 Jun 2019 17:56:48 +0800 Message-Id: <20190624092317.912727803@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190624092313.788773607@linuxfoundation.org> References: <20190624092313.788773607@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org [ Upstream commit 3562f5d9f21e7779ae442a45197fed6cb247fd22 ] The WRITE ZEROES command has no data transfer so that we need to initialize the struct (nvmet_req *req)->data_len to 0x0. While (nvmet_req *req)->transfer_len is initialized in nvmet_req_init(), data_len will be initialized by nowhere which might cause the failure with status code NVME_SC_SGL_INVALID_DATA | NVME_SC_DNR randomly. It's because nvmet_req_execute() checks like: if (unlikely(req->data_len != req->transfer_len)) { req->error_loc = offsetof(struct nvme_common_command, dptr); nvmet_req_complete(req, NVME_SC_SGL_INVALID_DATA | NVME_SC_DNR); } else req->execute(req); This patch fixes req->data_len not to be a randomly assigned by initializing it to 0x0 when preparing the command in nvmet_bdev_parse_io_cmd(). nvmet_file_parse_io_cmd() which is for file-backed I/O has already initialized the data_len field to 0x0, though. Cc: Christoph Hellwig Cc: Sagi Grimberg Cc: Chaitanya Kulkarni Signed-off-by: Minwoo Im Reviewed-by: Chaitanya Kulkarni Reviewed-by: Christoph Hellwig Signed-off-by: Sagi Grimberg Signed-off-by: Sasha Levin --- drivers/nvme/target/io-cmd-bdev.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/nvme/target/io-cmd-bdev.c b/drivers/nvme/target/io-cmd-bdev.c index 7bc9f6240432..1096dd01ca22 100644 --- a/drivers/nvme/target/io-cmd-bdev.c +++ b/drivers/nvme/target/io-cmd-bdev.c @@ -239,6 +239,7 @@ u16 nvmet_bdev_parse_io_cmd(struct nvmet_req *req) return 0; case nvme_cmd_write_zeroes: req->execute = nvmet_bdev_execute_write_zeroes; + req->data_len = 0; return 0; default: pr_err("unhandled cmd %d on qid %d\n", cmd->common.opcode, -- 2.20.1