| Message ID | 20231012-strncpy-drivers-net-phy-nxp-cbtx-c-v1-1-4510f20aa0e6@google.com (mailing list archive) |
|---|---|
| State | Changes Requested |
| Headers | show |
| Series | net: phy: replace deprecated strncpy with ethtool_sprintf | expand |
Hi Justin The Subject line should say which PHY you are patching, nxp-cbtx. The patches which follow do have driver names. Please repost with the Subject corrected. Please also take a look at https://www.kernel.org/doc/html/latest/process/maintainer-netdev.html which will tell you about networking subsystem specific processes it would be nice to follow. > 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: linux-hardening@vger.kernel.org > Signed-off-by: Justin Stitt <justinstitt@google.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Andrew --- pw-bot: cr
diff --git a/drivers/net/phy/nxp-cbtx.c b/drivers/net/phy/nxp-cbtx.c index 145703f0a406..6a2c0c193255 100644 --- a/drivers/net/phy/nxp-cbtx.c +++ b/drivers/net/phy/nxp-cbtx.c @@ -182,7 +182,7 @@ static int cbtx_get_sset_count(struct phy_device *phydev) static void cbtx_get_strings(struct phy_device *phydev, u8 *data) { - strncpy(data, "100btx_rx_err", ETH_GSTRING_LEN); + ethtool_sprintf(&data, "100btx_rx_err"); } static void cbtx_get_stats(struct phy_device *phydev,
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: linux-hardening@vger.kernel.org Signed-off-by: Justin Stitt <justinstitt@google.com> --- Note: build-tested only. Found with: $ rg "strncpy\(" --- drivers/net/phy/nxp-cbtx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- base-commit: cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 change-id: 20231012-strncpy-drivers-net-phy-nxp-cbtx-c-266285682759 Best regards, -- Justin Stitt <justinstitt@google.com>