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ixgbe: cleanup ixgbe_get_drvinfo to be extra careful with buffer boundaries

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Make the code in ixgbe_get_drvinfo more protected against buffer overflow
boundaries by using snprintf and sizeof with snprintf.

Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Don Skidmore 2010-08-19 13:33:16 +00:00 committed by David S. Miller
parent 357e8b5f72
commit 083fc582b8
1 changed files with 11 additions and 8 deletions
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13
drivers/net/ixgbe/ixgbe_ethtool.c
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@ -820,16 +820,19 @@ static void ixgbe_get_drvinfo(struct net_device *netdev,
struct ixgbe_adapter *adapter = netdev_priv(netdev); struct ixgbe_adapter *adapter = netdev_priv(netdev);
char firmware_version[32]; char firmware_version[32];
strncpy(drvinfo->driver, ixgbe_driver_name, 32); strncpy(drvinfo->driver, ixgbe_driver_name, sizeof(drvinfo->driver));
strncpy(drvinfo->version, ixgbe_driver_version, 32); strncpy(drvinfo->version, ixgbe_driver_version,
sizeof(drvinfo->version));
sprintf(firmware_version, "%d.%d-%d", snprintf(firmware_version, sizeof(firmware_version), "%d.%d-%d",
(adapter->eeprom_version & 0xF000) >> 12, (adapter->eeprom_version & 0xF000) >> 12,
(adapter->eeprom_version & 0x0FF0) >> 4, (adapter->eeprom_version & 0x0FF0) >> 4,
adapter->eeprom_version & 0x000F); adapter->eeprom_version & 0x000F);
strncpy(drvinfo->fw_version, firmware_version, 32); strncpy(drvinfo->fw_version, firmware_version,
strncpy(drvinfo->bus_info, pci_name(adapter->pdev), 32); sizeof(drvinfo->fw_version));
strncpy(drvinfo->bus_info, pci_name(adapter->pdev),
sizeof(drvinfo->bus_info));
drvinfo->n_stats = IXGBE_STATS_LEN; drvinfo->n_stats = IXGBE_STATS_LEN;
drvinfo->testinfo_len = IXGBE_TEST_LEN; drvinfo->testinfo_len = IXGBE_TEST_LEN;
drvinfo->regdump_len = ixgbe_get_regs_len(netdev); drvinfo->regdump_len = ixgbe_get_regs_len(netdev);