From patchwork Sat Nov 26 13:50:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: wangyufen X-Patchwork-Id: 13056499 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 E512AC4167B for ; Sat, 26 Nov 2022 13:30:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229548AbiKZNaw (ORCPT ); Sat, 26 Nov 2022 08:30:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32770 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229487AbiKZNaw (ORCPT ); Sat, 26 Nov 2022 08:30:52 -0500 Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D5F6DDF83; Sat, 26 Nov 2022 05:30:50 -0800 (PST) Received: from canpemm500010.china.huawei.com (unknown [172.30.72.54]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4NKCK02cZSz15Mdj; Sat, 26 Nov 2022 21:30:12 +0800 (CST) Received: from localhost.localdomain (10.175.112.70) by canpemm500010.china.huawei.com (7.192.105.118) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Sat, 26 Nov 2022 21:30:46 +0800 From: Wang Yufen To: , , , CC: , , , , , Wang Yufen Subject: [PATCH v3 2/2] RDMA/srp: Fix error return code in srp_parse_options() Date: Sat, 26 Nov 2022 21:50:54 +0800 Message-ID: <1669470654-45828-2-git-send-email-wangyufen@huawei.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1669470654-45828-1-git-send-email-wangyufen@huawei.com> References: <1669470654-45828-1-git-send-email-wangyufen@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.112.70] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To canpemm500010.china.huawei.com (7.192.105.118) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org In the previous while loop, "ret" may be assigned zero, , so the error return code may be incorrectly set to 0 instead of -EINVAL. Add out_with_einval goto label and covert all "goto out;" to "goto out_with_einval:" where it's appropriate, alse investigate each case separately as Andy suggessted. Fixes: e711f968c49c ("IB/srp: replace custom implementation of hex2bin()") Fixes: 2a174df0c602 ("IB/srp: Use kstrtoull() instead of simple_strtoull()") Fixes: 19f313438c77 ("IB/srp: Add RDMA/CM support") Signed-off-by: Wang Yufen --- drivers/infiniband/ulp/srp/ib_srp.c | 86 ++++++++++++++++++++++++++----------- 1 file changed, 60 insertions(+), 26 deletions(-) diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c index 1075c2a..23445b7 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.c +++ b/drivers/infiniband/ulp/srp/ib_srp.c @@ -3343,7 +3343,7 @@ static int srp_parse_options(struct net *net, const char *buf, bool has_port; int opt_mask = 0; int token; - int ret = -EINVAL; + int ret; int i; options = kstrdup(buf, GFP_KERNEL); @@ -3410,7 +3410,8 @@ static int srp_parse_options(struct net *net, const char *buf, break; case SRP_OPT_PKEY: - if (match_hex(args, &token)) { + ret = match_hex(args, &token); + if (ret) { pr_warn("bad P_Key parameter '%s'\n", p); goto out; } @@ -3470,7 +3471,8 @@ static int srp_parse_options(struct net *net, const char *buf, break; case SRP_OPT_MAX_SECT: - if (match_int(args, &token)) { + ret = match_int(args, &token); + if (ret) { pr_warn("bad max sect parameter '%s'\n", p); goto out; } @@ -3478,9 +3480,12 @@ static int srp_parse_options(struct net *net, const char *buf, break; case SRP_OPT_QUEUE_SIZE: - if (match_int(args, &token) || token < 1) { - pr_warn("bad queue_size parameter '%s'\n", p); + ret = match_int(args, &token); + if (ret) goto out; + if (token < 1) { + pr_warn("bad queue_size parameter '%s'\n", p); + goto out_with_einval; } target->scsi_host->can_queue = token; target->queue_size = token + SRP_RSP_SQ_SIZE + @@ -3490,25 +3495,32 @@ static int srp_parse_options(struct net *net, const char *buf, break; case SRP_OPT_MAX_CMD_PER_LUN: - if (match_int(args, &token) || token < 1) { + ret = match_int(args, &token); + if (ret) + goto out; + if (token < 1) { pr_warn("bad max cmd_per_lun parameter '%s'\n", p); - goto out; + goto out_with_einval; } target->scsi_host->cmd_per_lun = token; break; case SRP_OPT_TARGET_CAN_QUEUE: - if (match_int(args, &token) || token < 1) { + ret = match_int(args, &token); + if (ret) + goto out; + if (token < 1) { pr_warn("bad max target_can_queue parameter '%s'\n", p); - goto out; + goto out_with_einval; } target->target_can_queue = token; break; case SRP_OPT_IO_CLASS: - if (match_hex(args, &token)) { + ret = match_hex(args, &token); + if (ret) { pr_warn("bad IO class parameter '%s'\n", p); goto out; } @@ -3517,7 +3529,7 @@ static int srp_parse_options(struct net *net, const char *buf, pr_warn("unknown IO class parameter value %x specified (use %x or %x).\n", token, SRP_REV10_IB_IO_CLASS, SRP_REV16A_IB_IO_CLASS); - goto out; + goto out_with_einval; } target->io_class = token; break; @@ -3539,16 +3551,20 @@ static int srp_parse_options(struct net *net, const char *buf, break; case SRP_OPT_CMD_SG_ENTRIES: - if (match_int(args, &token) || token < 1 || token > 255) { + ret = match_int(args, &token); + if (ret) + goto out; + if (token < 1 || token > 255) { pr_warn("bad max cmd_sg_entries parameter '%s'\n", p); - goto out; + goto out_with_einval; } target->cmd_sg_cnt = token; break; case SRP_OPT_ALLOW_EXT_SG: - if (match_int(args, &token)) { + ret = match_int(args, &token); + if (ret) { pr_warn("bad allow_ext_sg parameter '%s'\n", p); goto out; } @@ -3556,44 +3572,58 @@ static int srp_parse_options(struct net *net, const char *buf, break; case SRP_OPT_SG_TABLESIZE: - if (match_int(args, &token) || token < 1 || - token > SG_MAX_SEGMENTS) { + ret = match_int(args, &token); + if (ret) + goto out; + if (token < 1 || token > SG_MAX_SEGMENTS) { pr_warn("bad max sg_tablesize parameter '%s'\n", p); - goto out; + goto out_with_einval; } target->sg_tablesize = token; break; case SRP_OPT_COMP_VECTOR: - if (match_int(args, &token) || token < 0) { - pr_warn("bad comp_vector parameter '%s'\n", p); + ret = match_int(args, &token); + if (ret) goto out; + if (token < 0) { + pr_warn("bad comp_vector parameter '%s'\n", p); + goto out_with_einval; } target->comp_vector = token; break; case SRP_OPT_TL_RETRY_COUNT: - if (match_int(args, &token) || token < 2 || token > 7) { + ret = match_int(args, &token); + if (ret) + goto out; + if (token < 2 || token > 7) { pr_warn("bad tl_retry_count parameter '%s' (must be a number between 2 and 7)\n", p); - goto out; + goto out_with_einval; } target->tl_retry_count = token; break; case SRP_OPT_MAX_IT_IU_SIZE: - if (match_int(args, &token) || token < 0) { - pr_warn("bad maximum initiator to target IU size '%s'\n", p); + ret = match_int(args, &token); + if (ret) goto out; + if (token < 0) { + pr_warn("bad maximum initiator to target IU size '%s'\n", p); + goto out_with_einval; } target->max_it_iu_size = token; break; case SRP_OPT_CH_COUNT: - if (match_int(args, &token) || token < 1) { - pr_warn("bad channel count %s\n", p); + ret = match_int(args, &token); + if (ret) goto out; + if (token < 1) { + pr_warn("bad channel count %s\n", p); + goto out_with_einval; } target->ch_count = token; break; @@ -3601,7 +3631,7 @@ static int srp_parse_options(struct net *net, const char *buf, default: pr_warn("unknown parameter or missing value '%s' in target creation request\n", p); - goto out; + goto out_with_einval; } } @@ -3623,6 +3653,10 @@ static int srp_parse_options(struct net *net, const char *buf, out: kfree(options); return ret; + +out_with_einval: + ret = -EINVAL; + goto out; } static ssize_t add_target_store(struct device *dev,