| Message ID | 20231011-strncpy-drivers-net-ethernet-microchip-sparx5-sparx5_ethtool-c-v1-1-410953d07f42@google.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | net: sparx5: replace deprecated strncpy with ethtool_sprintf | expand |
On Wed, Oct 11, 2023 at 09:37:18PM +0000, Justin Stitt wrote: > 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 more robust and easier to > understand interface. > > 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> Another direct ethtool_sprintf() replacement. Thanks! Reviewed-by: Kees Cook <keescook@chromium.org>
Hello: This patch was applied to netdev/net-next.git (main) by Jakub Kicinski <kuba@kernel.org>: On Wed, 11 Oct 2023 21:37:18 +0000 you wrote: > 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 more robust and easier to > understand interface. > > [...] Here is the summary with links: - net: sparx5: replace deprecated strncpy with ethtool_sprintf https://git.kernel.org/netdev/net-next/c/e343023e03d2 You are awesome, thank you!
diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_ethtool.c b/drivers/net/ethernet/microchip/sparx5/sparx5_ethtool.c index 01f3a3a41cdb..37d2584b48a7 100644 --- a/drivers/net/ethernet/microchip/sparx5/sparx5_ethtool.c +++ b/drivers/net/ethernet/microchip/sparx5/sparx5_ethtool.c @@ -1012,8 +1012,7 @@ static void sparx5_get_sset_strings(struct net_device *ndev, u32 sset, u8 *data) return; for (idx = 0; idx < sparx5->num_ethtool_stats; idx++) - strncpy(data + idx * ETH_GSTRING_LEN, - sparx5->stats_layout[idx], ETH_GSTRING_LEN); + ethtool_sprintf(&data, "%s", sparx5->stats_layout[idx]); } static void sparx5_get_sset_data(struct net_device *ndev,
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 more robust and easier to understand interface. 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/ethernet/microchip/sparx5/sparx5_ethtool.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- base-commit: cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 change-id: 20231011-strncpy-drivers-net-ethernet-microchip-sparx5-sparx5_ethtool-c-793896db6cf4 Best regards, -- Justin Stitt <justinstitt@google.com>