From ed9417206de7d306d6f79340fbe4849d3bdfae4e Mon Sep 17 00:00:00 2001 From: Justin Stitt Date: Mon, 9 Oct 2023 18:24:20 +0000 Subject: [PATCH] net: dsa: lantiq_gswip: replace deprecated strncpy with ethtool_sprintf `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 Signed-off-by: Justin Stitt Reviewed-by: Kees Cook Reviewed-by: Florian Fainelli Link: https://lore.kernel.org/r/20231009-strncpy-drivers-net-dsa-lantiq_gswip-c-v1-1-d55a986a14cc@google.com Signed-off-by: Jakub Kicinski --- drivers/net/dsa/lantiq_gswip.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/net/dsa/lantiq_gswip.c b/drivers/net/dsa/lantiq_gswip.c index 25abf2caf5fb..1a2d5797bf98 100644 --- a/drivers/net/dsa/lantiq_gswip.c +++ b/drivers/net/dsa/lantiq_gswip.c @@ -1759,8 +1759,7 @@ static void gswip_get_strings(struct dsa_switch *ds, int port, u32 stringset, return; for (i = 0; i < ARRAY_SIZE(gswip_rmon_cnt); i++) - strncpy(data + i * ETH_GSTRING_LEN, gswip_rmon_cnt[i].name, - ETH_GSTRING_LEN); + ethtool_sprintf(&data, "%s", gswip_rmon_cnt[i].name); } static u32 gswip_bcm_ram_entry_read(struct gswip_priv *priv, u32 table,