From patchwork Tue May 16 02:53:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Azeem Shaikh X-Patchwork-Id: 683862 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 A41CCC77B7D for ; Tue, 16 May 2023 02:53:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229879AbjEPCxv (ORCPT ); Mon, 15 May 2023 22:53:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60514 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229774AbjEPCxu (ORCPT ); Mon, 15 May 2023 22:53:50 -0400 Received: from mail-il1-x135.google.com (mail-il1-x135.google.com [IPv6:2607:f8b0:4864:20::135]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CECDB4C17; Mon, 15 May 2023 19:53:48 -0700 (PDT) Received: by mail-il1-x135.google.com with SMTP id e9e14a558f8ab-334f64c91aeso24588595ab.2; Mon, 15 May 2023 19:53:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1684205628; x=1686797628; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=PPK335sb4Cf31lJbZCxsHRj3PEm/5gZa6oNqr83Lzyw=; b=JogALCqy2cPwzHHhxfINXnYvM4vYAoJddwJgLf7BB5tI/43dNo45SpNpjzuoOne7rA 5P9WaVe3v9bEj/hdij4ez3dLu4Ro40GcKi/tOuvs4I87vp/eVD+MFYijwH7vFM4S+aw4 WQGgTE/W+Uj+1+gXjw1jbbcuzQx5htG0WeVuCxBebWfdVEj+L/KWsT7BPvNXniAf9aYK E7FuKddBuyGgfniD2Towkix3Wqds9yjeIx+d0lQhQTpfDK8Ek45h/BzN+hUILZwoeNHs dGVsmtPMfsBS5ef32//ggs74w/HQC+qGXxinu7a/NWnE7PUkD6CVxmXvHILVLGFYFwo3 6+mw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684205628; x=1686797628; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=PPK335sb4Cf31lJbZCxsHRj3PEm/5gZa6oNqr83Lzyw=; b=jE8gEf0nAR14FyEXCVzRrQRyBL5MiCP/yDt9Xk0dFVkzO8HNKM+7aRav6qHPLhLnGT /BR0cYd0FSq/kNOMndGT8tmvfBsimaX4kDEgvO2ZohXy8Ls94eC3nCvHgHQELlive+TE gOO5KJ7eY94csRV7GcgrxiRxcBc2S1Ss+KYuvh4yXqcxR9Pxx2f00IH/UWxiAPBevmen KYo+mCrU22XFntQBUHs1jgfyXMa3DDPXvB2rdcYqU4GeRtGdGLi6/bw9BhqwJm3NKuMO GADTy8Fppq4ApTGfxYrH1P7nIt+utEU2ahF7PB6FE3mu1vvxQVeacw56oycAtdxcoeoE oCNA== X-Gm-Message-State: AC+VfDxhvGGHJ+J4+BKbJjSMT2AWAROS7wmQnc1aQ+tCumuqeG6jxQdD KjQTsA90nqd0cMNXfszE/fo= X-Google-Smtp-Source: ACHHUZ4ct61Y0xN8dW0ABXsS/m04wf32vXiZfpsDBTi3wLsxXM5N+wUkrOluqNG14nrVsixQMV1Jlw== X-Received: by 2002:a92:d8cb:0:b0:331:2e7b:9efa with SMTP id l11-20020a92d8cb000000b003312e7b9efamr22051000ilo.19.1684205627983; Mon, 15 May 2023 19:53:47 -0700 (PDT) Received: from azeems-kspp.c.googlers.com.com (54.70.188.35.bc.googleusercontent.com. [35.188.70.54]) by smtp.gmail.com with ESMTPSA id u1-20020a02aa81000000b00418849c2ea7sm2784139jai.122.2023.05.15.19.53.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 May 2023 19:53:47 -0700 (PDT) From: Azeem Shaikh To: "Martin K. Petersen" Cc: linux-hardening@vger.kernel.org, Azeem Shaikh , linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-kernel@vger.kernel.org, Mike Christie , Maurizio Lombardi , Al Viro Subject: [PATCH] scsi: target: Replace all non-returning strlcpy with strscpy Date: Tue, 16 May 2023 02:53:22 +0000 Message-ID: <20230516025322.2804923-1-azeemshaikh38@gmail.com> X-Mailer: git-send-email 2.40.1.606.ga4b1b128d6-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org strlcpy() reads the entire source buffer first. This read may exceed the destination size limit. This is both inefficient and can lead to linear read overflows if a source string is not NUL-terminated [1]. In an effort to remove strlcpy() completely [2], replace strlcpy() here with strscpy(). No return values were used, so direct replacement is safe. [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy [2] https://github.com/KSPP/linux/issues/89 Signed-off-by: Azeem Shaikh --- drivers/target/iscsi/iscsi_target_parameters.c | 4 ++-- drivers/target/iscsi/iscsi_target_util.c | 4 ++-- drivers/target/target_core_configfs.c | 10 +++++----- drivers/target/target_core_device.c | 6 +++--- 4 files changed, 12 insertions(+), 12 deletions(-) diff --git a/drivers/target/iscsi/iscsi_target_parameters.c b/drivers/target/iscsi/iscsi_target_parameters.c index 557516c642c3..5b90c22ee3dc 100644 --- a/drivers/target/iscsi/iscsi_target_parameters.c +++ b/drivers/target/iscsi/iscsi_target_parameters.c @@ -726,8 +726,8 @@ static int iscsi_add_notunderstood_response( } INIT_LIST_HEAD(&extra_response->er_list); - strlcpy(extra_response->key, key, sizeof(extra_response->key)); - strlcpy(extra_response->value, NOTUNDERSTOOD, + strscpy(extra_response->key, key, sizeof(extra_response->key)); + strscpy(extra_response->value, NOTUNDERSTOOD, sizeof(extra_response->value)); list_add_tail(&extra_response->er_list, diff --git a/drivers/target/iscsi/iscsi_target_util.c b/drivers/target/iscsi/iscsi_target_util.c index 26dc8ed3045b..dc1ac5a0f806 100644 --- a/drivers/target/iscsi/iscsi_target_util.c +++ b/drivers/target/iscsi/iscsi_target_util.c @@ -1321,7 +1321,7 @@ void iscsit_collect_login_stats( if (conn->param_list) intrname = iscsi_find_param_from_key(INITIATORNAME, conn->param_list); - strlcpy(ls->last_intr_fail_name, + strscpy(ls->last_intr_fail_name, (intrname ? intrname->value : "Unknown"), sizeof(ls->last_intr_fail_name)); @@ -1360,7 +1360,7 @@ void iscsit_fill_cxn_timeout_err_stats(struct iscsit_session *sess) return; spin_lock_bh(&tiqn->sess_err_stats.lock); - strlcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, + strscpy(tiqn->sess_err_stats.last_sess_fail_rem_name, sess->sess_ops->InitiatorName, sizeof(tiqn->sess_err_stats.last_sess_fail_rem_name)); tiqn->sess_err_stats.last_sess_failure_type = diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c index 74b67c346dfe..936e5ff1b209 100644 --- a/drivers/target/target_core_configfs.c +++ b/drivers/target/target_core_configfs.c @@ -649,7 +649,7 @@ static void dev_set_t10_wwn_model_alias(struct se_device *dev) * here without potentially breaking existing setups, so continue to * truncate one byte shorter than what can be carried in INQUIRY. */ - strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN); + strscpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN); } static ssize_t emulate_model_alias_store(struct config_item *item, @@ -675,7 +675,7 @@ static ssize_t emulate_model_alias_store(struct config_item *item, if (flag) { dev_set_t10_wwn_model_alias(dev); } else { - strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod, + strscpy(dev->t10_wwn.model, dev->transport->inquiry_prod, sizeof(dev->t10_wwn.model)); } da->emulate_model_alias = flag; @@ -1426,7 +1426,7 @@ static ssize_t target_wwn_vendor_id_store(struct config_item *item, } BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); - strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor)); + strscpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor)); pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:" " %s\n", dev->t10_wwn.vendor); @@ -1482,7 +1482,7 @@ static ssize_t target_wwn_product_id_store(struct config_item *item, } BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); - strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model)); + strscpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model)); pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n", dev->t10_wwn.model); @@ -1538,7 +1538,7 @@ static ssize_t target_wwn_revision_store(struct config_item *item, } BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); - strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision)); + strscpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision)); pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n", dev->t10_wwn.revision); diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c index 90f3f4926172..b7ac60f4a219 100644 --- a/drivers/target/target_core_device.c +++ b/drivers/target/target_core_device.c @@ -789,10 +789,10 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name) xcopy_lun->lun_tpg = &xcopy_pt_tpg; /* Preload the default INQUIRY const values */ - strlcpy(dev->t10_wwn.vendor, "LIO-ORG", sizeof(dev->t10_wwn.vendor)); - strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod, + strscpy(dev->t10_wwn.vendor, "LIO-ORG", sizeof(dev->t10_wwn.vendor)); + strscpy(dev->t10_wwn.model, dev->transport->inquiry_prod, sizeof(dev->t10_wwn.model)); - strlcpy(dev->t10_wwn.revision, dev->transport->inquiry_rev, + strscpy(dev->t10_wwn.revision, dev->transport->inquiry_rev, sizeof(dev->t10_wwn.revision)); return dev;