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Message-ID: <20231005-strncpy-drivers-net-can-sja1000-peak_pci-c-v1-1-c36e1702cd56@google.com> Date: Thu, 05 Oct 2023 00:05:35 +0000 From: Justin Stitt <justinstitt@...gle.com> To: Wolfgang Grandegger <wg@...ndegger.com>, Marc Kleine-Budde <mkl@...gutronix.de>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com> Cc: linux-can@...r.kernel.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org, Justin Stitt <justinstitt@...gle.com> Subject: [PATCH] can: peak_pci: replace deprecated strncpy with strscpy `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> --- Note: build-tested only. --- 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; --- base-commit: cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 change-id: 20231004-strncpy-drivers-net-can-sja1000-peak_pci-c-9c2e5e32be83 Best regards, -- Justin Stitt <justinstitt@...gle.com>
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