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From: Azeem Shaikh <azeemshaikh38@gmail.com>
To: Adam Radford <aradford@gmail.com>
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: 3w-9xxx: Replace all non-returning strlcpy with strscpy
Date: Wed, 17 May 2023 14:29:55 +0000	[thread overview]
Message-ID: <20230517142955.1519572-1-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/3w-9xxx.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/3w-9xxx.c b/drivers/scsi/3w-9xxx.c
index 38d20a69ee12..f925f8664c2c 100644
--- a/drivers/scsi/3w-9xxx.c
+++ b/drivers/scsi/3w-9xxx.c
@@ -617,7 +617,7 @@ static int twa_check_srl(TW_Device_Extension *tw_dev, int *flashed)
 	}
 
 	/* Load rest of compatibility struct */
-	strlcpy(tw_dev->tw_compat_info.driver_version, TW_DRIVER_VERSION,
+	strscpy(tw_dev->tw_compat_info.driver_version, TW_DRIVER_VERSION,
 		sizeof(tw_dev->tw_compat_info.driver_version));
 	tw_dev->tw_compat_info.driver_srl_high = TW_CURRENT_DRIVER_SRL;
 	tw_dev->tw_compat_info.driver_branch_high = TW_CURRENT_DRIVER_BRANCH;


             reply	other threads:[~2023-05-17 14:30 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-17 14:29 Azeem Shaikh [this message]
2023-05-17 19:13 ` [PATCH] scsi: 3w-9xxx: Replace all non-returning strlcpy with strscpy Kees Cook
2023-05-22 19:39 ` Kees Cook
2023-05-22 22:41   ` Martin K. Petersen
2023-05-23  1:21     ` Kees Cook

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