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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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