linux-kernel - [PATCH v3 1/2] Staging: rts5208: Replace strncpy() 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]

Message-Id: <20231030142751.49913-1-nicymimz@gmail.com>
Date:   Mon, 30 Oct 2023 17:27:47 +0300
From:   Nancy Nyambura <nicymimz@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     nicydaniels@...il.com, outreachy@...ts.linux.dev,
        Nancy Nyambura <nicymimz@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: [PATCH v3 1/2] Staging: rts5208: Replace strncpy() with strscpy()

Warning found by checkpath.pl
I replaced strncpy with strscpy because strscpy is suitable when the destination buffer is NUL-terminated, which is often the case when copying strings. Strscpy ensures that the destination buffer is properly NUL-terminated without padding. In the code, the objective is to copy a string (inquiry_string) to the buf buffer, and it's likely that the buf buffer is NUL-terminated since it is handling a string. Strscpy_pad is used when you have afixed-size buffer, and you want to copy a string into it while ensuring the remaining space is padded with a specific character (like '\0') hence not appropriate for this context.

Signed-off-by: Nancy Nyambura <nicymimz@...il.com>
---
Changes in v2:
  - Explain why strscpy and not strscpy_pad

 drivers/staging/rts5208/rtsx_scsi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/rts5208/rtsx_scsi.c b/drivers/staging/rts5208/rtsx_scsi.c
index 08bd768ad34d..52324b8ebbc7 100644
--- a/drivers/staging/rts5208/rtsx_scsi.c
+++ b/drivers/staging/rts5208/rtsx_scsi.c
@@ -523,7 +523,7 @@ static int inquiry(struct scsi_cmnd *srb, struct rtsx_chip *chip)

 	if (sendbytes > 8) {
 		memcpy(buf, inquiry_buf, 8);
-		strncpy(buf + 8, inquiry_string, sendbytes - 8);
+		strscpy(buf + 8, inquiry_string, sendbytes - 8);
 		if (pro_formatter_flag) {
 			/* Additional Length */
 			buf[4] = 0x33;
-- 
2.40.1