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From: Azeem Shaikh <azeemshaikh38@gmail.com>
To: Matthew Wilcox <willy@infradead.org>
Cc: linux-hardening@vger.kernel.org,
	Azeem Shaikh <azeemshaikh38@gmail.com>,
	linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
	"James E.J. Bottomley" <jejb@linux.ibm.com>,
	"Martin K. Petersen" <martin.petersen@oracle.com>
Subject: [PATCH] scsi: sym53c8xx: Replace all non-returning strlcpy with strscpy
Date: Tue, 30 May 2023 16:03:23 +0000	[thread overview]
Message-ID: <20230530160323.412484-1-azeemshaikh38@gmail.com> (raw)

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/sym53c8xx_2/sym_glue.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/sym53c8xx_2/sym_glue.c b/drivers/scsi/sym53c8xx_2/sym_glue.c
index ee36a9c15d9c..17491ba10439 100644
--- a/drivers/scsi/sym53c8xx_2/sym_glue.c
+++ b/drivers/scsi/sym53c8xx_2/sym_glue.c
@@ -1286,7 +1286,7 @@ static struct Scsi_Host *sym_attach(const struct scsi_host_template *tpnt, int u
 	/*
 	 *  Edit its name.
 	 */
-	strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
+	strscpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
 	sprintf(np->s.inst_name, "sym%d", np->s.unit);
 
 	if ((SYM_CONF_DMA_ADDRESSING_MODE > 0) && (np->features & FE_DAC) &&


             reply	other threads:[~2023-05-30 16:03 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-30 16:03 Azeem Shaikh [this message]
2023-05-30 23:17 ` [PATCH] scsi: sym53c8xx: Replace all non-returning strlcpy with strscpy Kees Cook
2023-05-31 22:04 ` Martin K. Petersen
2023-06-08  1:42 ` Martin K. Petersen

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