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/qedi/qedi_main.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/qedi/qedi_main.c b/drivers/scsi/qedi/qedi_main.c
index 45d359554182..450522b204d6 100644
--- a/drivers/scsi/qedi/qedi_main.c
+++ b/drivers/scsi/qedi/qedi_main.c
@@ -2593,7 +2593,7 @@ static int __qedi_probe(struct pci_dev *pdev, int mode)
 	sp_params.drv_minor = QEDI_DRIVER_MINOR_VER;
 	sp_params.drv_rev = QEDI_DRIVER_REV_VER;
 	sp_params.drv_eng = QEDI_DRIVER_ENG_VER;
-	strlcpy(sp_params.name, "qedi iSCSI", QED_DRV_VER_STR_SIZE);
+	strscpy(sp_params.name, "qedi iSCSI", QED_DRV_VER_STR_SIZE);
 	rc = qedi_ops->common->slowpath_start(qedi->cdev, &sp_params);
 	if (rc) {
 		QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath\n");

On Wed, 17 May 2023 14:35:09 +0000, Azeem Shaikh wrote:
> 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.
> 
> [...]

Applied to for-next/hardening, thanks!

[1/1] scsi: qedi: Replace all non-returning strlcpy with strscpy
      https://git.kernel.org/kees/c/66f7f4013aa9

-- 
Kees Cook

On Wed, May 17, 2023 at 02:35:09PM +0000, Azeem Shaikh wrote:
> 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>

Reviewed-by: Kees Cook <keescook@chromium.org>

-- 
Kees Cook