linux-kernel - [PATCH][next] scsi: lpfc: replace snprintf with strscpy

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Date:   Thu, 20 Dec 2018 17:08:05 +0000
From:   Colin King <colin.king@...onical.com>
To:     James Smart <jsmart2021@...il.com>,
        Dick Kennedy <dick.kennedy@...adcom.com>,
        "James E . J . Bottomley" <jejb@...ux.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][next] scsi: lpfc: replace snprintf with strscpy

From: Colin Ian King <colin.king@...onical.com>

Using snprintf without a format specifier is potentially risky if the
string phba->ModelDesc contains format specifiers. Replace this with
the safer and more efficient strscpy.

Cleans up clang warning:
drivers/scsi/lpfc/lpfc_scsi.c:4543:31: warning: format string is not a
string literal (potentially insecure) [-Wformat-security]

Fixes: 5021267af132 ("scsi: lpfc: Adding ability to reset chip via pci bus reset")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/scsi/lpfc/lpfc_scsi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index b4f1a840b3b4..7b0cce3b42ed 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -4540,7 +4540,7 @@ lpfc_info(struct Scsi_Host *host)
 	memset(lpfcinfobuf, 0, sizeof(lpfcinfobuf));
 	if (phba && phba->pcidev){
 		/* Model Description */
-		scnprintf(tmp, sizeof(tmp), phba->ModelDesc);
+		strscpy(tmp, phba->ModelDesc, sizeof(tmp));
 		if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
 		    sizeof(lpfcinfobuf))
 			goto buffer_done;
-- 
2.19.1