diff options
| author | Justin Stitt <justinstitt@google.com> | 2023-10-17 12:04:08 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-10-18 18:10:17 -0700 |
| commit | be39d0a61aedafc6e7ec401d93fc7c477779996c (patch) | |
| tree | 1faadcfe2a60f378ead27f1cf66bc500ca5a9073 | |
| parent | 48b238461b90bcfba1177674031aaaa5e8ffc207 (diff) | |
i40e: use scnprintf over strncpy+strncat
`strncpy` is deprecated for use on NUL-terminated destination strings
[1] and as such we should prefer more robust and less ambiguous string
interfaces.
Moreover, `strncat` shouldn't really be used either as per
fortify-string.h:
* Do not use this function. While FORTIFY_SOURCE tries to avoid
* read and write overflows, this is only possible when the sizes
* of @p and @q are known to the compiler. Prefer building the
* string with formatting, via scnprintf() or similar.
Instead, use `scnprintf` with "%s%s" format string. This code is now
more readable and robust.
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
Signed-off-by: Justin Stitt <justinstitt@google.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20231017190411.2199743-7-jacob.e.keller@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_ddp.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_ddp.c b/drivers/net/ethernet/intel/i40e/i40e_ddp.c index 6b68b6575a1d..cf25bfc5dc3f 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_ddp.c +++ b/drivers/net/ethernet/intel/i40e/i40e_ddp.c @@ -456,10 +456,9 @@ int i40e_ddp_flash(struct net_device *netdev, struct ethtool_flash *flash) char profile_name[sizeof(I40E_DDP_PROFILE_PATH) + I40E_DDP_PROFILE_NAME_MAX]; - profile_name[sizeof(profile_name) - 1] = 0; - strncpy(profile_name, I40E_DDP_PROFILE_PATH, - sizeof(profile_name) - 1); - strncat(profile_name, flash->data, I40E_DDP_PROFILE_NAME_MAX); + scnprintf(profile_name, sizeof(profile_name), "%s%s", + I40E_DDP_PROFILE_PATH, flash->data); + /* Load DDP recipe. */ status = request_firmware(&ddp_config, profile_name, &netdev->dev); |