linux-hardening - [PATCH] scsi: qla2xxx: Replace all non-returning strlcpy with strscpy

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 16 May 2023 02:54:04 +0000
From:   Azeem Shaikh <azeemshaikh38@...il.com>
To:     Nilesh Javali <njavali@...vell.com>,
        GR-QLogic-Storage-Upstream@...vell.com
Cc:     linux-hardening@...r.kernel.org,
        Azeem Shaikh <azeemshaikh38@...il.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [PATCH] scsi: qla2xxx: Replace all non-returning strlcpy with strscpy

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 <azeemshaikh38@...il.com>
---
 drivers/scsi/qla2xxx/qla_init.c |    8 ++++----
 drivers/scsi/qla2xxx/qla_mr.c   |   20 ++++++++++----------
 2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index ec0423ec6681..e831d14a4044 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -4861,7 +4861,7 @@ qla2x00_set_model_info(scsi_qla_host_t *vha, uint8_t *model, size_t len,
 		if (use_tbl &&
 		    ha->pdev->subsystem_vendor == PCI_VENDOR_ID_QLOGIC &&
 		    index < QLA_MODEL_NAMES)
-			strlcpy(ha->model_desc,
+			strscpy(ha->model_desc,
 			    qla2x00_model_name[index * 2 + 1],
 			    sizeof(ha->model_desc));
 	} else {
@@ -4869,14 +4869,14 @@ qla2x00_set_model_info(scsi_qla_host_t *vha, uint8_t *model, size_t len,
 		if (use_tbl &&
 		    ha->pdev->subsystem_vendor == PCI_VENDOR_ID_QLOGIC &&
 		    index < QLA_MODEL_NAMES) {
-			strlcpy(ha->model_number,
+			strscpy(ha->model_number,
 				qla2x00_model_name[index * 2],
 				sizeof(ha->model_number));
-			strlcpy(ha->model_desc,
+			strscpy(ha->model_desc,
 			    qla2x00_model_name[index * 2 + 1],
 			    sizeof(ha->model_desc));
 		} else {
-			strlcpy(ha->model_number, def,
+			strscpy(ha->model_number, def,
 				sizeof(ha->model_number));
 		}
 	}
diff --git a/drivers/scsi/qla2xxx/qla_mr.c b/drivers/scsi/qla2xxx/qla_mr.c
index f726eb8449c5..083f94e43fba 100644
--- a/drivers/scsi/qla2xxx/qla_mr.c
+++ b/drivers/scsi/qla2xxx/qla_mr.c
@@ -691,7 +691,7 @@ qlafx00_pci_info_str(struct scsi_qla_host *vha, char *str, size_t str_len)
 	struct qla_hw_data *ha = vha->hw;
 
 	if (pci_is_pcie(ha->pdev))
-		strlcpy(str, "PCIe iSA", str_len);
+		strscpy(str, "PCIe iSA", str_len);
 	return str;
 }
 
@@ -1850,21 +1850,21 @@ qlafx00_fx_disc(scsi_qla_host_t *vha, fc_port_t *fcport, uint16_t fx_type)
 			phost_info = &preg_hsi->hsi;
 			memset(preg_hsi, 0, sizeof(struct register_host_info));
 			phost_info->os_type = OS_TYPE_LINUX;
-			strlcpy(phost_info->sysname, p_sysid->sysname,
+			strscpy(phost_info->sysname, p_sysid->sysname,
 				sizeof(phost_info->sysname));
-			strlcpy(phost_info->nodename, p_sysid->nodename,
+			strscpy(phost_info->nodename, p_sysid->nodename,
 				sizeof(phost_info->nodename));
 			if (!strcmp(phost_info->nodename, "(none)"))
 				ha->mr.host_info_resend = true;
-			strlcpy(phost_info->release, p_sysid->release,
+			strscpy(phost_info->release, p_sysid->release,
 				sizeof(phost_info->release));
-			strlcpy(phost_info->version, p_sysid->version,
+			strscpy(phost_info->version, p_sysid->version,
 				sizeof(phost_info->version));
-			strlcpy(phost_info->machine, p_sysid->machine,
+			strscpy(phost_info->machine, p_sysid->machine,
 				sizeof(phost_info->machine));
-			strlcpy(phost_info->domainname, p_sysid->domainname,
+			strscpy(phost_info->domainname, p_sysid->domainname,
 				sizeof(phost_info->domainname));
-			strlcpy(phost_info->hostdriver, QLA2XXX_VERSION,
+			strscpy(phost_info->hostdriver, QLA2XXX_VERSION,
 				sizeof(phost_info->hostdriver));
 			preg_hsi->utc = (uint64_t)ktime_get_real_seconds();
 			ql_dbg(ql_dbg_init, vha, 0x0149,
@@ -1909,9 +1909,9 @@ qlafx00_fx_disc(scsi_qla_host_t *vha, fc_port_t *fcport, uint16_t fx_type)
 	if (fx_type == FXDISC_GET_CONFIG_INFO) {
 		struct config_info_data *pinfo =
 		    (struct config_info_data *) fdisc->u.fxiocb.rsp_addr;
-		strlcpy(vha->hw->model_number, pinfo->model_num,
+		strscpy(vha->hw->model_number, pinfo->model_num,
 			ARRAY_SIZE(vha->hw->model_number));
-		strlcpy(vha->hw->model_desc, pinfo->model_description,
+		strscpy(vha->hw->model_desc, pinfo->model_description,
 			ARRAY_SIZE(vha->hw->model_desc));
 		memcpy(&vha->hw->mr.symbolic_name, pinfo->symbolic_name,
 		    sizeof(vha->hw->mr.symbolic_name));