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Date: Wed, 27 Mar 2019 14:19:46 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Florian Fainelli <f.fainelli@...il.com>, "David S . Miller" <davem@...emloft.net>, Sasha Levin <sashal@...nel.org>, netdev@...r.kernel.org Subject: [PATCH AUTOSEL 4.9 33/87] mlxsw: spectrum: Avoid -Wformat-truncation warnings From: Florian Fainelli <f.fainelli@...il.com> [ Upstream commit ab2c4e2581ad32c28627235ff0ae8c5a5ea6899f ] Give precision identifiers to the two snprintf() formatting the priority and TC strings to avoid producing these two warnings: drivers/net/ethernet/mellanox/mlxsw/spectrum.c: In function 'mlxsw_sp_port_get_prio_strings': drivers/net/ethernet/mellanox/mlxsw/spectrum.c:2132:37: warning: '%d' directive output may be truncated writing between 1 and 3 bytes into a region of size between 0 and 31 [-Wformat-truncation=] snprintf(*p, ETH_GSTRING_LEN, "%s_%d", ^~ drivers/net/ethernet/mellanox/mlxsw/spectrum.c:2132:3: note: 'snprintf' output between 3 and 36 bytes into a destination of size 32 snprintf(*p, ETH_GSTRING_LEN, "%s_%d", ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ mlxsw_sp_port_hw_prio_stats[i].str, prio); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/mellanox/mlxsw/spectrum.c: In function 'mlxsw_sp_port_get_tc_strings': drivers/net/ethernet/mellanox/mlxsw/spectrum.c:2143:37: warning: '%d' directive output may be truncated writing between 1 and 11 bytes into a region of size between 0 and 31 [-Wformat-truncation=] snprintf(*p, ETH_GSTRING_LEN, "%s_%d", ^~ drivers/net/ethernet/mellanox/mlxsw/spectrum.c:2143:3: note: 'snprintf' output between 3 and 44 bytes into a destination of size 32 snprintf(*p, ETH_GSTRING_LEN, "%s_%d", ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ mlxsw_sp_port_hw_tc_stats[i].str, tc); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Signed-off-by: Florian Fainelli <f.fainelli@...il.com> Reviewed-by: Ido Schimmel <idosch@...lanox.com> Signed-off-by: David S. Miller <davem@...emloft.net> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c index 22a5916e477e..cc847e0cac2d 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c @@ -1565,7 +1565,7 @@ static void mlxsw_sp_port_get_prio_strings(u8 **p, int prio) int i; for (i = 0; i < MLXSW_SP_PORT_HW_PRIO_STATS_LEN; i++) { - snprintf(*p, ETH_GSTRING_LEN, "%s_%d", + snprintf(*p, ETH_GSTRING_LEN, "%.29s_%.1d", mlxsw_sp_port_hw_prio_stats[i].str, prio); *p += ETH_GSTRING_LEN; } @@ -1576,7 +1576,7 @@ static void mlxsw_sp_port_get_tc_strings(u8 **p, int tc) int i; for (i = 0; i < MLXSW_SP_PORT_HW_TC_STATS_LEN; i++) { - snprintf(*p, ETH_GSTRING_LEN, "%s_%d", + snprintf(*p, ETH_GSTRING_LEN, "%.29s_%.1d", mlxsw_sp_port_hw_tc_stats[i].str, tc); *p += ETH_GSTRING_LEN; } -- 2.19.1
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