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From:   Azeem Shaikh <azeemshaikh38@gmail.com>
To:     "James E.J. Bottomley" <jejb@linux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        Bodo Stroesser <bostroesser@gmail.com>
Cc:     linux-hardening@vger.kernel.org,
        Azeem Shaikh <azeemshaikh38@gmail.com>,
        linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 1/2] scsi: Replace strlcpy with strscpy
Date:   Wed, 21 Jun 2023 03:00:32 +0000
Message-ID: <20230621030033.3800351-2-azeemshaikh38@gmail.com>
In-Reply-To: <20230621030033.3800351-1-azeemshaikh38@gmail.com>
References: <20230621030033.3800351-1-azeemshaikh38@gmail.com>
MIME-Version: 1.0
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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@gmail.com>
---
 drivers/scsi/ncr53c8xx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/ncr53c8xx.c b/drivers/scsi/ncr53c8xx.c
index 4458449c960b..35869b4f9329 100644
--- a/drivers/scsi/ncr53c8xx.c
+++ b/drivers/scsi/ncr53c8xx.c
@@ -4555,7 +4555,7 @@ static void ncr_detach(struct ncb *np)
 	char inst_name[16];
 
 	/* Local copy so we don't access np after freeing it! */
-	strlcpy(inst_name, ncr_name(np), sizeof(inst_name));
+	strscpy(inst_name, ncr_name(np), sizeof(inst_name));
 
 	printk("%s: releasing host resources\n", ncr_name(np));
 
-- 
2.41.0.162.gfafddb0af9-goog