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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, Justin Stitt Content-Type: text/plain; charset="utf-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable 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#strncp= y-on-nul-terminated-strings [1] Link: https://manpages.debian.org/testing/linux-manual-4.8/strscpy.9.en.htm= l [2] Link: https://github.com/KSPP/linux/issues/90 Cc: linux-hardening@vger.kernel.org Signed-off-by: Justin Stitt Reviewed-by: Kees Cook --- Note: build-tested only. Found with: $ rg "strncpy\(" --- drivers/net/phy/nxp-tja11xx.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/net/phy/nxp-tja11xx.c b/drivers/net/phy/nxp-tja11xx.c index b13e15310feb..a71399965142 100644 --- a/drivers/net/phy/nxp-tja11xx.c +++ b/drivers/net/phy/nxp-tja11xx.c @@ -414,10 +414,8 @@ static void tja11xx_get_strings(struct phy_device *phy= dev, u8 *data) { int i; =20 - for (i =3D 0; i < ARRAY_SIZE(tja11xx_hw_stats); i++) { - strncpy(data + i * ETH_GSTRING_LEN, - tja11xx_hw_stats[i].string, ETH_GSTRING_LEN); - } + for (i =3D 0; i < ARRAY_SIZE(tja11xx_hw_stats); i++) + ethtool_sprintf(&data, "%s", tja11xx_hw_stats[i].string); } =20 static void tja11xx_get_stats(struct phy_device *phydev, --- base-commit: cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 change-id: 20231012-strncpy-drivers-net-phy-nxp-tja11xx-c-99019080b1d4 Best regards, -- Justin Stitt