Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | Date | Thu, 05 Oct 2023 21:05:42 +0000 | Subject | [PATCH] bna: replace deprecated strncpy with strscpy | From | Justin Stitt <> |
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`strncpy` is deprecated for use on NUL-terminated destination strings [1] and as such we should prefer more robust and less ambiguous string interfaces.
bfa_ioc_get_adapter_manufacturer() simply copies a string literal into `manufacturer`.
NUL-padding is not needed because bfa_ioc_get_adapter_manufacturer()'s only caller passes `ad_attr` (which is from ioc_attr) which is then memset to 0. bfa_nw_ioc_get_attr() -> bfa_ioc_get_adapter_attr() -> bfa_nw_ioc_get_attr() -> memset((void *)ioc_attr, 0, sizeof(struct bfa_ioc_attr));
Considering the above, 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: linux-hardening@vger.kernel.org Signed-off-by: Justin Stitt <justinstitt@google.com> --- Note: build-tested only. --- drivers/net/ethernet/brocade/bna/bfa_ioc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/brocade/bna/bfa_ioc.c b/drivers/net/ethernet/brocade/bna/bfa_ioc.c index b07522ac3e74..497cb65f2d06 100644 --- a/drivers/net/ethernet/brocade/bna/bfa_ioc.c +++ b/drivers/net/ethernet/brocade/bna/bfa_ioc.c @@ -2839,7 +2839,7 @@ bfa_ioc_get_adapter_optrom_ver(struct bfa_ioc *ioc, char *optrom_ver) static void bfa_ioc_get_adapter_manufacturer(struct bfa_ioc *ioc, char *manufacturer) { - strncpy(manufacturer, BFA_MFG_NAME, BFA_ADAPTER_MFG_NAME_LEN); + strscpy(manufacturer, BFA_MFG_NAME, sizeof(manufacturer)); } static void --- base-commit: cbf3a2cb156a2c911d8f38d8247814b4c07f49a2 change-id: 20231005-strncpy-drivers-net-ethernet-brocade-bna-bfa_ioc-c-68f13966f388 Best regards, -- Justin Stitt <justinstitt@google.com>
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