From patchwork Fri Apr 8 03:56:49 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Douglas Gilbert X-Patchwork-Id: 12806042 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 2A7D5C433EF for ; Fri, 8 Apr 2022 04:06:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234222AbiDHEIr (ORCPT ); Fri, 8 Apr 2022 00:08:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39476 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234247AbiDHEIk (ORCPT ); Fri, 8 Apr 2022 00:08:40 -0400 Received: from smtp.infotech.no (smtp.infotech.no [82.134.31.41]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DDBA712FF88 for ; Thu, 7 Apr 2022 21:06:30 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by smtp.infotech.no (Postfix) with ESMTP id 560CA2041B2; Fri, 8 Apr 2022 05:57:04 +0200 (CEST) X-Virus-Scanned: by amavisd-new-2.6.6 (20110518) (Debian) at infotech.no Received: from smtp.infotech.no ([127.0.0.1]) by localhost (smtp.infotech.no [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lcZVVfYxalEx; Fri, 8 Apr 2022 05:57:03 +0200 (CEST) Received: from xtwo70.bingwo.ca (host-45-78-195-155.dyn.295.ca [45.78.195.155]) by smtp.infotech.no (Postfix) with ESMTPA id B8C342041CE; Fri, 8 Apr 2022 05:56:58 +0200 (CEST) From: Douglas Gilbert To: linux-scsi@vger.kernel.org Cc: martin.petersen@oracle.com, jejb@linux.vnet.ibm.com, hare@suse.de, bvanassche@acm.org, hch@lst.de Subject: [PATCH 4/6] bsg: allow cmd_len > 32 Date: Thu, 7 Apr 2022 23:56:49 -0400 Message-Id: <20220408035651.6472-5-dgilbert@interlog.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220408035651.6472-1-dgilbert@interlog.com> References: <20220408035651.6472-1-dgilbert@interlog.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Since the bsg interface accesses the CDB via scsi_cmnd::cmnd directly, change that to use the new access functions. Signed-off-by: Douglas Gilbert --- drivers/scsi/scsi_bsg.c | 22 +++++++++++++++------- 1 file changed, 15 insertions(+), 7 deletions(-) diff --git a/drivers/scsi/scsi_bsg.c b/drivers/scsi/scsi_bsg.c index 96ee35256a16..0001a95c6ce1 100644 --- a/drivers/scsi/scsi_bsg.c +++ b/drivers/scsi/scsi_bsg.c @@ -15,6 +15,7 @@ static int scsi_bsg_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr, struct scsi_cmnd *scmd; struct request *rq; struct bio *bio; + u8 *cdb; int ret; if (hdr->protocol != BSG_PROTOCOL_SCSI || @@ -33,17 +34,24 @@ static int scsi_bsg_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr, scmd = blk_mq_rq_to_pdu(rq); scmd->cmd_len = hdr->request_len; - if (scmd->cmd_len > sizeof(scmd->cmnd)) { + if (unlikely(scmd->cmd_len > SCSI_MAX_RUN_TIME_CDB_LEN)) { ret = -EINVAL; goto out_put_request; } + cdb = scsi_cmnd_set_cdb(scmd, NULL, scmd->cmd_len); + if (unlikely(!cdb)) { + ret = -ENOMEM; + goto out_put_request; + } - ret = -EFAULT; - if (copy_from_user(scmd->cmnd, uptr64(hdr->request), scmd->cmd_len)) + if (unlikely(copy_from_user(cdb, uptr64(hdr->request), scmd->cmd_len))) { + ret = -EFAULT; goto out_put_request; - ret = -EPERM; - if (!scsi_cmd_allowed(scmd->cmnd, mode)) + } + if (unlikely(!scsi_cmd_allowed(cdb, mode))) { + ret = -EPERM; goto out_put_request; + } ret = 0; if (hdr->dout_xfer_len) { @@ -54,7 +62,7 @@ static int scsi_bsg_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr, hdr->din_xfer_len, GFP_KERNEL); } - if (ret) + if (unlikely(ret)) goto out_put_request; bio = rq->bio; @@ -92,7 +100,7 @@ static int scsi_bsg_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr, blk_rq_unmap_user(bio); out_put_request: - blk_mq_free_request(rq); + scsi_free_cmnd(scmd); return ret; }