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Message-ID: <20231017190411.2199743-2-jacob.e.keller@intel.com>
Date: Tue, 17 Oct 2023 12:04:03 -0700
From: Jacob Keller <jacob.e.keller@...el.com>
To: netdev@...r.kernel.org,
David Miller <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
Cc: Jesse Brandeburg <jesse.brandeburg@...el.com>,
Alexander Lobakin <aleksander.lobakin@...el.com>,
Przemek Kitszel <przemyslaw.kitszel@...el.com>,
Pucha Himasekhar Reddy <himasekharx.reddy.pucha@...el.com>,
Jacob Keller <jacob.e.keller@...el.com>
Subject: [PATCH net-next 1/9] intel: fix string truncation warnings
From: Jesse Brandeburg <jesse.brandeburg@...el.com>
Fix -Wformat-truncated warnings to complete the intel directories' W=1
clean efforts. The W=1 recently got enhanced with a few new flags and
this brought up some new warnings.
Switch to using kasprintf() when possible so we always allocate the
right length strings.
summary of warnings:
drivers/net/ethernet/intel/iavf/iavf_virtchnl.c:1425:60: warning: ‘%s’ directive output may be truncated writing 4 bytes into a region of size between 1 and 11 [-Wformat-truncation=]
drivers/net/ethernet/intel/iavf/iavf_virtchnl.c:1425:17: note: ‘snprintf’ output between 7 and 17 bytes into a destination of size 13
drivers/net/ethernet/intel/ice/ice_ptp.c:43:27: warning: ‘%s’ directive output may be truncated writing up to 479 bytes into a region of size 64 [-Wformat-truncation=]
drivers/net/ethernet/intel/ice/ice_ptp.c:42:17: note: ‘snprintf’ output between 1 and 480 bytes into a destination of size 64
drivers/net/ethernet/intel/igb/igb_main.c:3092:53: warning: ‘%d’ directive output may be truncated writing between 1 and 5 bytes into a region of size between 1 and 13 [-Wformat-truncation=]
drivers/net/ethernet/intel/igb/igb_main.c:3092:34: note: directive argument in the range [0, 65535]
drivers/net/ethernet/intel/igb/igb_main.c:3092:34: note: directive argument in the range [0, 65535]
drivers/net/ethernet/intel/igb/igb_main.c:3090:25: note: ‘snprintf’ output between 23 and 43 bytes into a destination of size 32
Suggested-by: Alexander Lobakin <aleksander.lobakin@...el.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@...el.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@...el.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@...el.com> (A Contingent worker at Intel)
Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
---
.../net/ethernet/intel/iavf/iavf_ethtool.c | 4 +-
.../net/ethernet/intel/iavf/iavf_virtchnl.c | 22 ++++-------
drivers/net/ethernet/intel/ice/ice_ptp.c | 4 +-
drivers/net/ethernet/intel/igb/igb_main.c | 37 +++++++++----------
4 files changed, 30 insertions(+), 37 deletions(-)
diff --git a/drivers/net/ethernet/intel/iavf/iavf_ethtool.c b/drivers/net/ethernet/intel/iavf/iavf_ethtool.c
index 90397293525f..9246172c9c33 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_ethtool.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_ethtool.c
@@ -396,8 +396,8 @@ static void iavf_get_priv_flag_strings(struct net_device *netdev, u8 *data)
unsigned int i;
for (i = 0; i < IAVF_PRIV_FLAGS_STR_LEN; i++) {
- snprintf(data, ETH_GSTRING_LEN, "%s",
- iavf_gstrings_priv_flags[i].flag_string);
+ strscpy(data, iavf_gstrings_priv_flags[i].flag_string,
+ ETH_GSTRING_LEN);
data += ETH_GSTRING_LEN;
}
}
diff --git a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
index 8ce6389b5815..82b84a93bcc8 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
@@ -1378,8 +1378,6 @@ void iavf_disable_vlan_insertion_v2(struct iavf_adapter *adapter, u16 tpid)
VIRTCHNL_OP_DISABLE_VLAN_INSERTION_V2);
}
-#define IAVF_MAX_SPEED_STRLEN 13
-
/**
* iavf_print_link_message - print link up or down
* @adapter: adapter structure
@@ -1397,10 +1395,6 @@ static void iavf_print_link_message(struct iavf_adapter *adapter)
return;
}
- speed = kzalloc(IAVF_MAX_SPEED_STRLEN, GFP_KERNEL);
- if (!speed)
- return;
-
if (ADV_LINK_SUPPORT(adapter)) {
link_speed_mbps = adapter->link_speed_mbps;
goto print_link_msg;
@@ -1438,17 +1432,17 @@ static void iavf_print_link_message(struct iavf_adapter *adapter)
print_link_msg:
if (link_speed_mbps > SPEED_1000) {
- if (link_speed_mbps == SPEED_2500)
- snprintf(speed, IAVF_MAX_SPEED_STRLEN, "2.5 Gbps");
- else
+ if (link_speed_mbps == SPEED_2500) {
+ speed = kasprintf(GFP_KERNEL, "%s", "2.5 Gbps");
+ } else {
/* convert to Gbps inline */
- snprintf(speed, IAVF_MAX_SPEED_STRLEN, "%d %s",
- link_speed_mbps / 1000, "Gbps");
+ speed = kasprintf(GFP_KERNEL, "%d Gbps",
+ link_speed_mbps / 1000);
+ }
} else if (link_speed_mbps == SPEED_UNKNOWN) {
- snprintf(speed, IAVF_MAX_SPEED_STRLEN, "%s", "Unknown Mbps");
+ speed = kasprintf(GFP_KERNEL, "%s", "Unknown Mbps");
} else {
- snprintf(speed, IAVF_MAX_SPEED_STRLEN, "%d %s",
- link_speed_mbps, "Mbps");
+ speed = kasprintf(GFP_KERNEL, "%d Mbps", link_speed_mbps);
}
netdev_info(netdev, "NIC Link is Up Speed is %s Full Duplex\n", speed);
diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.c b/drivers/net/ethernet/intel/ice/ice_ptp.c
index 5293df2d57a8..1eddcbe89b0c 100644
--- a/drivers/net/ethernet/intel/ice/ice_ptp.c
+++ b/drivers/net/ethernet/intel/ice/ice_ptp.c
@@ -39,8 +39,8 @@ ice_get_sma_config_e810t(struct ice_hw *hw, struct ptp_pin_desc *ptp_pins)
/* initialize with defaults */
for (i = 0; i < NUM_PTP_PINS_E810T; i++) {
- snprintf(ptp_pins[i].name, sizeof(ptp_pins[i].name),
- "%s", ice_pin_desc_e810t[i].name);
+ strscpy(ptp_pins[i].name, ice_pin_desc_e810t[i].name,
+ sizeof(ptp_pins[i].name));
ptp_pins[i].index = ice_pin_desc_e810t[i].index;
ptp_pins[i].func = ice_pin_desc_e810t[i].func;
ptp_pins[i].chan = ice_pin_desc_e810t[i].chan;
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 2ac9dffd0bf8..fdadf3e84f59 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -3069,6 +3069,7 @@ void igb_set_fw_version(struct igb_adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
struct e1000_fw_version fw;
+ char *lbuf;
igb_get_fw_version(hw, &fw);
@@ -3076,36 +3077,34 @@ void igb_set_fw_version(struct igb_adapter *adapter)
case e1000_i210:
case e1000_i211:
if (!(igb_get_flash_presence_i210(hw))) {
- snprintf(adapter->fw_version,
- sizeof(adapter->fw_version),
- "%2d.%2d-%d",
- fw.invm_major, fw.invm_minor,
- fw.invm_img_type);
+ lbuf = kasprintf(GFP_KERNEL, "%2d.%2d-%d",
+ fw.invm_major, fw.invm_minor,
+ fw.invm_img_type);
break;
}
fallthrough;
default:
- /* if option is rom valid, display its version too */
+ /* if option rom is valid, display its version too */
if (fw.or_valid) {
- snprintf(adapter->fw_version,
- sizeof(adapter->fw_version),
- "%d.%d, 0x%08x, %d.%d.%d",
- fw.eep_major, fw.eep_minor, fw.etrack_id,
- fw.or_major, fw.or_build, fw.or_patch);
+ lbuf = kasprintf(GFP_KERNEL, "%d.%d, 0x%08x, %d.%d.%d",
+ fw.eep_major, fw.eep_minor,
+ fw.etrack_id, fw.or_major, fw.or_build,
+ fw.or_patch);
/* no option rom */
} else if (fw.etrack_id != 0X0000) {
- snprintf(adapter->fw_version,
- sizeof(adapter->fw_version),
- "%d.%d, 0x%08x",
- fw.eep_major, fw.eep_minor, fw.etrack_id);
+ lbuf = kasprintf(GFP_KERNEL, "%d.%d, 0x%08x",
+ fw.eep_major, fw.eep_minor,
+ fw.etrack_id);
} else {
- snprintf(adapter->fw_version,
- sizeof(adapter->fw_version),
- "%d.%d.%d",
- fw.eep_major, fw.eep_minor, fw.eep_build);
+ lbuf = kasprintf(GFP_KERNEL, "%d.%d.%d", fw.eep_major,
+ fw.eep_minor, fw.eep_build);
}
break;
}
+
+ /* the truncate happens here if it doesn't fit */
+ strscpy(adapter->fw_version, lbuf, sizeof(adapter->fw_version));
+ kfree(lbuf);
}
/**
--
2.41.0
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