From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1B4AA53B4 for ; Sun, 17 Sep 2023 19:33:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4290DC433C7; Sun, 17 Sep 2023 19:33:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1694979218; bh=cOb+I8G+kFo0ngTRsoVoKRIuhzLEZUlcJJX6QKK6ndQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MLB9GPcS1hWwE6tFIISKb3C+kZpj7DbJstMvNcrQyTKi1X541Gqx8c+zJvtnOJ4B9 koiFANIHn3nHoWR+kzcPN+YQ3H9HNljuSepX3H9DQ0WSWFmVSYDGzbYW/sDlSSylAc 7b8QXtbQaAolZU/gbvEB/hfdO0cQ+3q2cx5n/Meg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Lin Ma , Chris Leech , "Martin K. Petersen" , Sasha Levin Subject: [PATCH 5.10 222/406] scsi: qla4xxx: Add length check when parsing nlattrs Date: Sun, 17 Sep 2023 21:11:16 +0200 Message-ID: <20230917191107.040661289@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230917191101.035638219@linuxfoundation.org> References: <20230917191101.035638219@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Lin Ma [ Upstream commit 47cd3770e31df942e2bb925a9a855c79ed0662eb ] There are three places that qla4xxx parses nlattrs: - qla4xxx_set_chap_entry() - qla4xxx_iface_set_param() - qla4xxx_sysfs_ddb_set_param() and each of them directly converts the nlattr to specific pointer of structure without length checking. This could be dangerous as those attributes are not validated and a malformed nlattr (e.g., length 0) could result in an OOB read that leaks heap dirty data. Add the nla_len check before accessing the nlattr data and return EINVAL if the length check fails. Fixes: 26ffd7b45fe9 ("[SCSI] qla4xxx: Add support to set CHAP entries") Fixes: 1e9e2be3ee03 ("[SCSI] qla4xxx: Add flash node mgmt support") Fixes: 00c31889f751 ("[SCSI] qla4xxx: fix data alignment and use nl helpers") Signed-off-by: Lin Ma Link: https://lore.kernel.org/r/20230723080053.3714534-1-linma@zju.edu.cn Reviewed-by: Chris Leech Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/qla4xxx/ql4_os.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c index 8d82d2a83059d..05ae9b1157096 100644 --- a/drivers/scsi/qla4xxx/ql4_os.c +++ b/drivers/scsi/qla4xxx/ql4_os.c @@ -973,6 +973,11 @@ static int qla4xxx_set_chap_entry(struct Scsi_Host *shost, void *data, int len) memset(&chap_rec, 0, sizeof(chap_rec)); nla_for_each_attr(attr, data, len, rem) { + if (nla_len(attr) < sizeof(*param_info)) { + rc = -EINVAL; + goto exit_set_chap; + } + param_info = nla_data(attr); switch (param_info->param) { @@ -2755,6 +2760,11 @@ qla4xxx_iface_set_param(struct Scsi_Host *shost, void *data, uint32_t len) } nla_for_each_attr(attr, data, len, rem) { + if (nla_len(attr) < sizeof(*iface_param)) { + rval = -EINVAL; + goto exit_init_fw_cb; + } + iface_param = nla_data(attr); if (iface_param->param_type == ISCSI_NET_PARAM) { @@ -8119,6 +8129,11 @@ qla4xxx_sysfs_ddb_set_param(struct iscsi_bus_flash_session *fnode_sess, memset((void *)&chap_tbl, 0, sizeof(chap_tbl)); nla_for_each_attr(attr, data, len, rem) { + if (nla_len(attr) < sizeof(*fnode_param)) { + rc = -EINVAL; + goto exit_set_param; + } + fnode_param = nla_data(attr); switch (fnode_param->param) { -- 2.40.1