`strncpy` is deprecated for use on NUL-terminated destination strings [1] and as such we should prefer more robust and less ambiguous string interfaces.
NUL-padding is not required as drvinfo is memset to 0: | memset(drvinfo, 0, sizeof(struct ethtool_drvinfo)); A suitable replacement is `strscpy` [2] due to the fact that it guarantees NUL-termination on the destination buffer without unnecessarily NUL-padding. 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: [email protected] Signed-off-by: Justin Stitt <[email protected]> --- Note: build-tested only. --- drivers/net/ethernet/cavium/liquidio/lio_ethtool.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/cavium/liquidio/lio_ethtool.c b/drivers/net/ethernet/cavium/liquidio/lio_ethtool.c index 9d56181a301f..d3e07b6ed5e1 100644 --- a/drivers/net/ethernet/cavium/liquidio/lio_ethtool.c +++ b/drivers/net/ethernet/cavium/liquidio/lio_ethtool.c @@ -442,10 +442,11 @@ lio_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *drvinfo) oct = lio->oct_dev; memset(drvinfo, 0, sizeof(struct ethtool_drvinfo)); - strcpy(drvinfo->driver, "liquidio"); - strncpy(drvinfo->fw_version, oct->fw_info.liquidio_firmware_version, - ETHTOOL_FWVERS_LEN); - strncpy(drvinfo->bus_info, pci_name(oct->pci_dev), 32); + strscpy(drvinfo->driver, "liquidio", sizeof(drvinfo->driver)); + strscpy(drvinfo->fw_version, oct->fw_info.liquidio_firmware_version, + sizeof(drvinfo->fw_version)); + strscpy(drvinfo->bus_info, pci_name(oct->pci_dev), + sizeof(drvinfo->bus_info)); } static void @@ -458,10 +459,11 @@ lio_get_vf_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *drvinfo) oct = lio->oct_dev; memset(drvinfo, 0, sizeof(struct ethtool_drvinfo)); - strcpy(drvinfo->driver, "liquidio_vf"); - strncpy(drvinfo->fw_version, oct->fw_info.liquidio_firmware_version, - ETHTOOL_FWVERS_LEN); - strncpy(drvinfo->bus_info, pci_name(oct->pci_dev), 32); + strscpy(drvinfo->driver, "liquidio_vf", sizeof(drvinfo->driver)); + strscpy(drvinfo->fw_version, oct->fw_info.liquidio_firmware_version, + sizeof(drvinfo->fw_version)); + strscpy(drvinfo->bus_info, pci_name(oct->pci_dev), + sizeof(drvinfo->bus_info)); } static int --- base-commit: cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 change-id: 20231005-strncpy-drivers-net-ethernet-cavium-liquidio-lio_ethtool-c-b6932c0f80f1 Best regards, -- Justin Stitt <[email protected]>
