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Message-Id: <20231005195812.549776-6-mkl@pengutronix.de> Date: Thu, 5 Oct 2023 21:57:40 +0200 From: Marc Kleine-Budde <mkl@...gutronix.de> To: netdev@...r.kernel.org Cc: davem@...emloft.net, kuba@...nel.org, linux-can@...r.kernel.org, kernel@...gutronix.de, Justin Stitt <justinstitt@...gle.com>, linux-hardening@...r.kernel.org, Kees Cook <keescook@...omium.org>, Marc Kleine-Budde <mkl@...gutronix.de> Subject: [PATCH net-next 05/37] can: peak_pci: replace deprecated strncpy with strscpy From: Justin Stitt <justinstitt@...gle.com> `strncpy` is deprecated for use on NUL-terminated destination strings [1] and as such we should prefer more robust and less ambiguous string interfaces. NUL-padding is not required since card is already zero-initialized: | card = kzalloc(sizeof(*card), GFP_KERNEL); A suitable replacement is `strscpy` [2] due to the fact that it guarantees NUL-termination on the destination buffer without unnecessarily NUL-padding. Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1] Link: https://manpages.debian.org/testing/linux-manual-4.8/strscpy.9.en.html [2] Link: https://github.com/KSPP/linux/issues/90 Cc: linux-hardening@...r.kernel.org Signed-off-by: Justin Stitt <justinstitt@...gle.com> Reviewed-by: Kees Cook <keescook@...omium.org> Link: https://lore.kernel.org/all/20231005-strncpy-drivers-net-can-sja1000-peak_pci-c-v1-1-c36e1702cd56@google.com Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de> --- drivers/net/can/sja1000/peak_pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/can/sja1000/peak_pci.c b/drivers/net/can/sja1000/peak_pci.c index 84f34020aafb..da396d641e24 100644 --- a/drivers/net/can/sja1000/peak_pci.c +++ b/drivers/net/can/sja1000/peak_pci.c @@ -462,7 +462,7 @@ static int peak_pciec_probe(struct pci_dev *pdev, struct net_device *dev) card->led_chip.owner = THIS_MODULE; card->led_chip.dev.parent = &pdev->dev; card->led_chip.algo_data = &card->i2c_bit; - strncpy(card->led_chip.name, "peak_i2c", + strscpy(card->led_chip.name, "peak_i2c", sizeof(card->led_chip.name)); card->i2c_bit = peak_pciec_i2c_bit_ops; -- 2.40.1
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