strncpy() is deprecated for use on NUL-terminated destination strings [1] and as such we should prefer more robust and less ambiguous string interfaces.
ethtool_sprintf() is designed specifically for get_strings() usage. Let's replace strncpy in favor of this dedicated helper function. 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: [email protected] Signed-off-by: Justin Stitt <[email protected]> --- Note: build-tested only. Found with: $ rg "strncpy\(" --- drivers/net/phy/smsc.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/net/phy/smsc.c b/drivers/net/phy/smsc.c index c88edb19d2e7..1c7306a1af13 100644 --- a/drivers/net/phy/smsc.c +++ b/drivers/net/phy/smsc.c @@ -507,10 +507,8 @@ static void smsc_get_strings(struct phy_device *phydev, u8 *data) { int i; - for (i = 0; i < ARRAY_SIZE(smsc_hw_stats); i++) { - strncpy(data + i * ETH_GSTRING_LEN, - smsc_hw_stats[i].string, ETH_GSTRING_LEN); - } + for (i = 0; i < ARRAY_SIZE(smsc_hw_stats); i++) + ethtool_sprintf(&data, "%s", smsc_hw_stats[i].string); } static u64 smsc_get_stat(struct phy_device *phydev, int i) --- base-commit: cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 change-id: 20231012-strncpy-drivers-net-phy-smsc-c-75dff87bab53 Best regards, -- Justin Stitt <[email protected]>
