From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alice Michael Date: Thu, 4 Oct 2018 15:18:26 -0700 Subject: [Intel-wired-lan] [next PATCH S97 3/7] i40e: Replace strncpy with strlcpy to ensure null termination In-Reply-To: <20181004221830.16212-1-alice.michael@intel.com> References: <20181004221830.16212-1-alice.michael@intel.com> Message-ID: <20181004221830.16212-3-alice.michael@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: intel-wired-lan@osuosl.org List-ID: From: Patryk Ma?ek Using strncpy allows destination buffer to be not null terminated after the copying takes place. strlcpy ensures that's not the case by explicitly setting last element in the buffer as '\0'. Signed-off-by: Patryk Ma?ek --- drivers/net/ethernet/intel/i40e/i40e_main.c | 14 +++++++------- drivers/net/ethernet/intel/i40e/i40e_ptp.c | 2 +- 2 files changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index f98e0bd..de82129 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -14525,23 +14525,23 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent) switch (hw->bus.speed) { case i40e_bus_speed_8000: - strncpy(speed, "8.0", PCI_SPEED_SIZE); break; + strlcpy(speed, "8.0", PCI_SPEED_SIZE); break; case i40e_bus_speed_5000: - strncpy(speed, "5.0", PCI_SPEED_SIZE); break; + strlcpy(speed, "5.0", PCI_SPEED_SIZE); break; case i40e_bus_speed_2500: - strncpy(speed, "2.5", PCI_SPEED_SIZE); break; + strlcpy(speed, "2.5", PCI_SPEED_SIZE); break; default: break; } switch (hw->bus.width) { case i40e_bus_width_pcie_x8: - strncpy(width, "8", PCI_WIDTH_SIZE); break; + strlcpy(width, "8", PCI_WIDTH_SIZE); break; case i40e_bus_width_pcie_x4: - strncpy(width, "4", PCI_WIDTH_SIZE); break; + strlcpy(width, "4", PCI_WIDTH_SIZE); break; case i40e_bus_width_pcie_x2: - strncpy(width, "2", PCI_WIDTH_SIZE); break; + strlcpy(width, "2", PCI_WIDTH_SIZE); break; case i40e_bus_width_pcie_x1: - strncpy(width, "1", PCI_WIDTH_SIZE); break; + strlcpy(width, "1", PCI_WIDTH_SIZE); break; default: break; } diff --git a/drivers/net/ethernet/intel/i40e/i40e_ptp.c b/drivers/net/ethernet/intel/i40e/i40e_ptp.c index 1199f05..e6fc0af 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_ptp.c +++ b/drivers/net/ethernet/intel/i40e/i40e_ptp.c @@ -694,7 +694,7 @@ static long i40e_ptp_create_clock(struct i40e_pf *pf) if (!IS_ERR_OR_NULL(pf->ptp_clock)) return 0; - strncpy(pf->ptp_caps.name, i40e_driver_name, + strlcpy(pf->ptp_caps.name, i40e_driver_name, sizeof(pf->ptp_caps.name) - 1); pf->ptp_caps.owner = THIS_MODULE; pf->ptp_caps.max_adj = 999999999; -- 2.9.5